<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cde3e-1acd-7da4-8ace-4b46d3937eb5,g:d4d7a322-6152-45cf-a7c5-81e12a1aa300-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:npwr="http://netpower.com/20260331" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://netpower.com/20260331">
  <xs:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="npwr-20260331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="npwr-20260331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="npwr-20260331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="npwr-20260331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://netpower.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsUnaudited" roleURI="http://netpower.com/role/CondensedConsolidatedBalanceSheetsUnaudited">
        <link:definition>9952151 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsUnauditedParenthetical" roleURI="http://netpower.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical">
        <link:definition>9952152 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsandComprehensiveLossUnaudited" roleURI="http://netpower.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLossUnaudited">
        <link:definition>9952153 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofShareholdersEquityandMezzanineShareholdersEquityUnaudited" roleURI="http://netpower.com/role/CondensedConsolidatedStatementsofShareholdersEquityandMezzanineShareholdersEquityUnaudited">
        <link:definition>9952154 - Statement - Condensed Consolidated Statements of Shareholders' Equity and Mezzanine Shareholders' Equity (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsUnaudited" roleURI="http://netpower.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited">
        <link:definition>9952155 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureofBusinessandBasisofPresentation" roleURI="http://netpower.com/role/NatureofBusinessandBasisofPresentation">
        <link:definition>9952156 - Disclosure - Nature of Business and Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPolicies" roleURI="http://netpower.com/role/SignificantAccountingPolicies">
        <link:definition>9952157 - Disclosure - Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Investments" roleURI="http://netpower.com/role/Investments">
        <link:definition>9952158 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://netpower.com/role/FairValueMeasurements">
        <link:definition>9952159 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssets" roleURI="http://netpower.com/role/GoodwillandIntangibleAssets">
        <link:definition>9952160 - Disclosure - Goodwill and Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipment" roleURI="http://netpower.com/role/PropertyPlantandEquipment">
        <link:definition>9952161 - Disclosure - Property, Plant, and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilities" roleURI="http://netpower.com/role/AccruedLiabilities">
        <link:definition>9952162 - Disclosure - Accrued Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RedeemableNonControllingInterestsinSubsidiary" roleURI="http://netpower.com/role/RedeemableNonControllingInterestsinSubsidiary">
        <link:definition>9952163 - Disclosure - Redeemable Non-Controlling Interests in Subsidiary</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensation" roleURI="http://netpower.com/role/ShareBasedCompensation">
        <link:definition>9952164 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossperShare" roleURI="http://netpower.com/role/LossperShare">
        <link:definition>9952165 - Disclosure - Loss per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://netpower.com/role/IncomeTaxes">
        <link:definition>9952166 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactions" roleURI="http://netpower.com/role/RelatedPartyTransactions">
        <link:definition>9952167 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OnetimeEmployeeTerminationCosts" roleURI="http://netpower.com/role/OnetimeEmployeeTerminationCosts">
        <link:definition>9952168 - Disclosure - One-time Employee Termination Costs</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://netpower.com/role/CommitmentsandContingencies">
        <link:definition>9952169 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesPolicies" roleURI="http://netpower.com/role/SignificantAccountingPoliciesPolicies">
        <link:definition>9955511 - Disclosure - Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsTables" roleURI="http://netpower.com/role/InvestmentsTables">
        <link:definition>9955512 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://netpower.com/role/FairValueMeasurementsTables">
        <link:definition>9955513 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsTables" roleURI="http://netpower.com/role/GoodwillandIntangibleAssetsTables">
        <link:definition>9955514 - Disclosure - Goodwill and Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentTables" roleURI="http://netpower.com/role/PropertyPlantandEquipmentTables">
        <link:definition>9955515 - Disclosure - Property, Plant, and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesTables" roleURI="http://netpower.com/role/AccruedLiabilitiesTables">
        <link:definition>9955516 - Disclosure - Accrued Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RedeemableNonControllingInterestsinSubsidiaryTables" roleURI="http://netpower.com/role/RedeemableNonControllingInterestsinSubsidiaryTables">
        <link:definition>9955517 - Disclosure - Redeemable Non-Controlling Interests in Subsidiary (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationTables" roleURI="http://netpower.com/role/ShareBasedCompensationTables">
        <link:definition>9955518 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossperShareTables" roleURI="http://netpower.com/role/LossperShareTables">
        <link:definition>9955519 - Disclosure - Loss per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsTables" roleURI="http://netpower.com/role/RelatedPartyTransactionsTables">
        <link:definition>9955520 - Disclosure - Related Party Transactions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://netpower.com/role/CommitmentsandContingenciesTables">
        <link:definition>9955521 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureofBusinessandBasisofPresentationDetails" roleURI="http://netpower.com/role/NatureofBusinessandBasisofPresentationDetails">
        <link:definition>9955522 - Disclosure - Nature of Business and Basis of Presentation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantAccountingPoliciesDetails" roleURI="http://netpower.com/role/SignificantAccountingPoliciesDetails">
        <link:definition>9955523 - Disclosure - Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsDetails" roleURI="http://netpower.com/role/InvestmentsDetails">
        <link:definition>9955524 - Disclosure - Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsScheduleofFairValueofAssetsandLiabilitiesMeasuredonaRecurringBasisDetails" roleURI="http://netpower.com/role/FairValueMeasurementsScheduleofFairValueofAssetsandLiabilitiesMeasuredonaRecurringBasisDetails">
        <link:definition>9955525 - Disclosure - Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsReconciliationofLevel3FairValueofLiabilitiesDetails" roleURI="http://netpower.com/role/FairValueMeasurementsReconciliationofLevel3FairValueofLiabilitiesDetails">
        <link:definition>9955526 - Disclosure - Fair Value Measurements - Reconciliation of Level 3 Fair Value of Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsNarrativeDetails" roleURI="http://netpower.com/role/FairValueMeasurementsNarrativeDetails">
        <link:definition>9955527 - Disclosure - Fair Value Measurements - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasuresandDisclosuresFairValueMeasurementInputsandValuationTechniquesDetails" roleURI="http://netpower.com/role/FairValueMeasuresandDisclosuresFairValueMeasurementInputsandValuationTechniquesDetails">
        <link:definition>9955528 - Disclosure - Fair Value Measures and Disclosures - Fair Value Measurement Inputs and Valuation Techniques (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsNarrativeDetails" roleURI="http://netpower.com/role/GoodwillandIntangibleAssetsNarrativeDetails">
        <link:definition>9955529 - Disclosure - Goodwill and Intangible Assets - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails" roleURI="http://netpower.com/role/GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails">
        <link:definition>9955530 - Disclosure - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsAmortizationExpenseDetails" roleURI="http://netpower.com/role/GoodwillandIntangibleAssetsAmortizationExpenseDetails">
        <link:definition>9955531 - Disclosure - Goodwill and Intangible Assets - Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" roleURI="http://netpower.com/role/GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails">
        <link:definition>9955532 - Disclosure - Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" roleURI="http://netpower.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails">
        <link:definition>9955533 - Disclosure - Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentNarrativeDetails" roleURI="http://netpower.com/role/PropertyPlantandEquipmentNarrativeDetails">
        <link:definition>9955534 - Disclosure - Property, Plant, and Equipment - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentDepreciationandAmortizationDetails" roleURI="http://netpower.com/role/PropertyPlantandEquipmentDepreciationandAmortizationDetails">
        <link:definition>9955535 - Disclosure - Property, Plant, and Equipment - Depreciation and Amortization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesDetails" roleURI="http://netpower.com/role/AccruedLiabilitiesDetails">
        <link:definition>9955536 - Disclosure - Accrued Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RedeemableNonControllingInterestsinSubsidiaryScheduleOfConsolidationLessthanWhollyOwnedSubsidiaryParentOwnershipInterestDetails" roleURI="http://netpower.com/role/RedeemableNonControllingInterestsinSubsidiaryScheduleOfConsolidationLessthanWhollyOwnedSubsidiaryParentOwnershipInterestDetails">
        <link:definition>9955537 - Disclosure - Redeemable Non-Controlling Interests in Subsidiary - Schedule Of Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RedeemableNonControllingInterestsinSubsidiaryNarrativeDetails" roleURI="http://netpower.com/role/RedeemableNonControllingInterestsinSubsidiaryNarrativeDetails">
        <link:definition>9955538 - Disclosure - Redeemable Non-Controlling Interests in Subsidiary - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationNarrativeDetails" roleURI="http://netpower.com/role/ShareBasedCompensationNarrativeDetails">
        <link:definition>9955539 - Disclosure - Share-Based Compensation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofShareBasedPaymentArrangementDetails" roleURI="http://netpower.com/role/ShareBasedCompensationScheduleofShareBasedPaymentArrangementDetails">
        <link:definition>9955540 - Disclosure - Share-Based Compensation -Schedule of Share-Based Payment Arrangement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofUnvestedRestrictedStockUnitsDetails" roleURI="http://netpower.com/role/ShareBasedCompensationScheduleofUnvestedRestrictedStockUnitsDetails">
        <link:definition>9955541 - Disclosure - Share-Based Compensation - Schedule of Unvested Restricted Stock Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationScheduleofPerformanceStockUnitsActivityDetails" roleURI="http://netpower.com/role/ShareBasedCompensationScheduleofPerformanceStockUnitsActivityDetails">
        <link:definition>9955542 - Disclosure - Share-Based Compensation - Schedule of Performance Stock Units Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossperShareScheduleofLossPerShareBasicandDilutedForCommonStockDetails" roleURI="http://netpower.com/role/LossperShareScheduleofLossPerShareBasicandDilutedForCommonStockDetails">
        <link:definition>9955543 - Disclosure - Loss per Share - Schedule of Loss Per Share, Basic, and Diluted, For Common Stock (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LossperShareScheduleofAntidilutiveSecuritiesExcludedFromComputationofDilutedLossPerShareSuccessorDetails" roleURI="http://netpower.com/role/LossperShareScheduleofAntidilutiveSecuritiesExcludedFromComputationofDilutedLossPerShareSuccessorDetails">
        <link:definition>9955544 - Disclosure - Loss per Share - Schedule of Antidilutive Securities Excluded From Computation of Diluted Loss Per Share (Successor) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetails" roleURI="http://netpower.com/role/IncomeTaxesDetails">
        <link:definition>9955545 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsStatementOfOperationsRelatedPartyTransactionsDetails" roleURI="http://netpower.com/role/RelatedPartyTransactionsStatementOfOperationsRelatedPartyTransactionsDetails">
        <link:definition>9955546 - Disclosure - Related Party Transactions - Statement Of Operations Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsNarrativeDetails" roleURI="http://netpower.com/role/RelatedPartyTransactionsNarrativeDetails">
        <link:definition>9955547 - Disclosure - Related Party Transactions - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsScheduleofShareBasedPaymentsIssuedtoBHESDetails" roleURI="http://netpower.com/role/RelatedPartyTransactionsScheduleofShareBasedPaymentsIssuedtoBHESDetails">
        <link:definition>9955548 - Disclosure - Related Party Transactions - Schedule of Share-Based Payments Issued to BHES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OnetimeEmployeeTerminationCostsDetails" roleURI="http://netpower.com/role/OnetimeEmployeeTerminationCostsDetails">
        <link:definition>9955549 - Disclosure - One-time Employee Termination Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesReconciliationofAssetRetirementObligationsDetails" roleURI="http://netpower.com/role/CommitmentsandContingenciesReconciliationofAssetRetirementObligationsDetails">
        <link:definition>9955550 - Disclosure - Commitments and Contingencies - Reconciliation of Asset Retirement Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesNarrativeDetails" roleURI="http://netpower.com/role/CommitmentsandContingenciesNarrativeDetails">
        <link:definition>9955551 - Disclosure - Commitments and Contingencies - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="npwr_WarrantLiabilityNoncurrent" abstract="false" name="WarrantLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_ProjectDevelopmentExpense" abstract="false" name="ProjectDevelopmentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_GainLossOnChangeInEarnoutSharesLiability" abstract="false" name="GainLossOnChangeInEarnoutSharesLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_GainLossOnChangeInTaxReceivableAgreementLiability" abstract="false" name="GainLossOnChangeInTaxReceivableAgreementLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_AdjustmentsToAdditionalPaidInCapitalRemeasurementAdjustmentToRedeemableNonControllingInterest" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalRemeasurementAdjustmentToRedeemableNonControllingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_AdjustmentsToAdditionalPaidInCapitalTaxReceivableAgreement" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalTaxReceivableAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_NonCashInterestIncomeExpense" abstract="false" name="NonCashInterestIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_FairValueAdjustmentContingentConsiderationAndWarrantLiabilities" abstract="false" name="FairValueAdjustmentContingentConsiderationAndWarrantLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_IncreaseDecreaseInCapitalExpendituresIncurredButNotYetPaid" abstract="false" name="IncreaseDecreaseInCapitalExpendituresIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_CleanGasProductMaximumPower" abstract="false" name="CleanGasProductMaximumPower" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="npwr_DebtSecuritiesAvailableForSaleUnrealizedGainCurrent" abstract="false" name="DebtSecuritiesAvailableForSaleUnrealizedGainCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_DebtSecuritiesAvailableForSaleUnrealizedLossCurrent" abstract="false" name="DebtSecuritiesAvailableForSaleUnrealizedLossCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_DebtSecuritiesAvailableForSaleUnrealizedGainNoncurrent" abstract="false" name="DebtSecuritiesAvailableForSaleUnrealizedGainNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_DebtSecuritiesAvailableForSaleUnrealizedLossNoncurrent" abstract="false" name="DebtSecuritiesAvailableForSaleUnrealizedLossNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_PublicWarrantMember" abstract="true" name="PublicWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_PrivateWarrantMember" abstract="true" name="PrivateWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_EarnoutSharesMember" abstract="true" name="EarnoutSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_PrivatePlacementWarrantMember" abstract="true" name="PrivatePlacementWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_OpCoMember" abstract="true" name="OpCoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_SharePriceRangeAxis" abstract="true" name="SharePriceRangeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="npwr_SharePriceRangeDomain" abstract="true" name="SharePriceRangeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_SharePriceEqualsOrExceedsEighteenUSDollarsMember" abstract="true" name="SharePriceEqualsOrExceedsEighteenUSDollarsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_SharePriceEqualsOrExceedsTenUSDollarsMember" abstract="true" name="SharePriceEqualsOrExceedsTenUSDollarsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_SharePriceIsBelowEighteenUSDollarsMember" abstract="true" name="SharePriceIsBelowEighteenUSDollarsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_MeasurementInputStrikePriceMember" abstract="true" name="MeasurementInputStrikePriceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_ValuationBlackScholesMertonModelMember" abstract="true" name="ValuationBlackScholesMertonModelMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_ClassOfWarrantOrRightRedemptionPricePerWarrant" abstract="false" name="ClassOfWarrantOrRightRedemptionPricePerWarrant" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="npwr_ClassOfWarrantsOrRightConvertibleThresholdTradingDays" abstract="false" name="ClassOfWarrantsOrRightConvertibleThresholdTradingDays" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="npwr_ClassOfWarrantsOrRightConvertibleThresholdConsecutiveTradingDays" abstract="false" name="ClassOfWarrantsOrRightConvertibleThresholdConsecutiveTradingDays" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="npwr_FiniteLivedIntangibleAssetExpectedAmortizationYearFiveAndThereafter" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationYearFiveAndThereafter" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_PropertyPlantAndEquipmentConstructionExpense" abstract="false" name="PropertyPlantAndEquipmentConstructionExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_AccruedCapitalExpenditures" abstract="false" name="AccruedCapitalExpenditures" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_FranchiseTaxPayable" abstract="false" name="FranchiseTaxPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_AccruedProjectExpenses" abstract="false" name="AccruedProjectExpenses" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_NonControllingInterestHoldersMember" abstract="true" name="NonControllingInterestHoldersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_NETPowerIncMember" abstract="true" name="NETPowerIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_RedeemableNoncontrollingInterestPercentageOfCommonUnits" abstract="false" name="RedeemableNoncontrollingInterestPercentageOfCommonUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="npwr_OmnibusIncentivePlanMember" abstract="true" name="OmnibusIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_CommonStockSharesReservedForFutureIssuanceAnnualIncreasePercentage" abstract="false" name="CommonStockSharesReservedForFutureIssuanceAnnualIncreasePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="npwr_CommonStockSharesReservedForFutureIssuancePercentage" abstract="false" name="CommonStockSharesReservedForFutureIssuancePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="npwr_BonusSharesMember" abstract="true" name="BonusSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_MakeWholeAwardsMember" abstract="true" name="MakeWholeAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_CommonClassAUnvestedMember" abstract="true" name="CommonClassAUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_EffectiveIncomeTaxRateReconciliationEstimatedAnnualPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationEstimatedAnnualPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="npwr_TaxReceivableAgreementLiability" abstract="false" name="TaxReceivableAgreementLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_AdministrativeCostsMember" abstract="true" name="AdministrativeCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_CostsForDemonstrationFacilityMember" abstract="true" name="CostsForDemonstrationFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_BakerHughesEnergyServicesLLCMember" abstract="true" name="BakerHughesEnergyServicesLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_BHESJDASuspensionAgreementMember" abstract="true" name="BHESJDASuspensionAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_JointDevelopmentAgreementsMember" abstract="true" name="JointDevelopmentAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_AssetPurchaseCommitmentMember" abstract="true" name="AssetPurchaseCommitmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_RelatedPartyTransactionSuspensionAgreementExtensionPeriod" abstract="false" name="RelatedPartyTransactionSuspensionAgreementExtensionPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="npwr_GainLossOnStockIssuedDuringPeriodValueIssuedForServices" abstract="false" name="GainLossOnStockIssuedDuringPeriodValueIssuedForServices" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_GainLossOnStockIssuedDuringPeriodValueIssuedForServicesInceptionToDate" abstract="false" name="GainLossOnStockIssuedDuringPeriodValueIssuedForServicesInceptionToDate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="npwr_UnrecordedUnconditionalPurchaseObligationThresholdTradingDays" abstract="false" name="UnrecordedUnconditionalPurchaseObligationThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="npwr_UnrecordedUnconditionalPurchaseObligationWeightedAverageSharePrice" abstract="false" name="UnrecordedUnconditionalPurchaseObligationWeightedAverageSharePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="npwr_JointDevelopmentAgreementsPaidInCashMember" abstract="true" name="JointDevelopmentAgreementsPaidInCashMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_JointDevelopmentAgreementsPaidInShareBasedPaymentsMember" abstract="true" name="JointDevelopmentAgreementsPaidInShareBasedPaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="npwr_UnrecordedUnconditionalPurchaseObligationPercentage" abstract="false" name="UnrecordedUnconditionalPurchaseObligationPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
