ASHRAE.HandBook_32-2007 GEOTHERMAL ENERGY

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1、RelatedCommercialResourcesCHAPTER32GEOTHERMALENERGYResources.................................................................................32.1GROUND-SOURCEHEATPUMPS........................................32.9DIRECT-USESYSTEMSDESIGN...........................................32.3

2、Terminology............................................................................32.10CostFactors.............................................................................32.3Ground-CoupledHeatPumps................................................32.12MaterialsandEquipment

3、.........................................................32.5GroundwaterHeatPumps......................................................32.22ResidentialandCommercialBuildingApplications................32.8WaterWells...................................................................

4、..........32.23IndustrialApplications............................................................32.9SurfaceWaterHeatPumps....................................................32.26HEuseofgeothermalresourcescanbesubdividedintothreeGeopressuredresources,presentwidelyintheGulfCoastoft

5、heTgeneralcategories:high-temperature(>300°F)electricpowerUnitedStates,consistofregionaloccurrencesofconfinedhotwaterproduction,intermediate-andlow-temperature(<300°F)direct-useindeepsedimentarystrata,wherepressuresofgreaterthan10,000psiapplications,andground-sourceheatpumpapplica

6、tions(generallyarecommon.Thisresourcealsocontainsmethane,whichisdissolved<90°F).Thischaptercoversonlydirectuse(includingwells,equip-inthegeothermalfluid.ment,andapplications)andground-sourceheatpumps.DesignRadiogenicheatsourcesexistinvariousregionsasgraniticplu-aspectsofthebuildin

7、gheatpumploopmaybefoundinChapter8tonicrocksthatarerelativelyrichinuraniumandthorium.Theseofthe2004ASHRAEHandbook—HVACSystemsandEquipment.plutonshaveahigherheatflowthanthesurroundingrock;iftheplutonsareblanketedbysedimentsoflowthermalconductivity,anRESOURCESelevatedtemperatureatthe

8、baseofthesedimentarysectioncanres