Transcription
niversity5/15/2015
Executive dloopsolutionutilizescross- usingclosed- fPEXapipeallowsacontinuouslengthofpipetobefactory- ‐formedinatight180- ‐degreeU- holeandback.ThePEXadoubleU- U- ‐bends(left)andhelixcoils(right)RMEH011
TheREHAUMontanaEcosmartHouseinBozemanisaLEED - Hwasconstructedusingfour300ft- ‐deepverticalboreholeswith1”PEXadoubleU- measuredtheheattransferofboththedoubleU- othedoubleU- uivalentheatexchangeasone300ftdoubleU- ‐bend.Experiment npossible.Thewater- ‐to- ‐waterground- hermalfieldcomprisesthree18- ‐feetdeep1”PEXapipehelicalprobesandfour300- ‐feetdeep1”PEXapipedouble- icalProbe(Trial2)2- ‐UVerticalBorehole(Trial1)Cooling2- ‐UVerticalBorehole(Trial2)HelicalProbe2- (*)Totalpipe(ft)(Btu/hr.probe)(W/probe)(Btu/hr.ft- ‐depth)(Btu/hr.ft- ely6to10feet.RMEH012
anceanalysisofRAUGEOhelixduringTrial2RMEH013
TheoutputperformanceoftheRAUGEO2- ngTrial2RMEH014
rRAUGEOvertical2U- ealreadycloseto32 0- ‐750W/probecouldRMEH015
esonthegroundloopsconsistentlyaround80 F.DoubleU- eingsustainedintherangeof32- ‐38 of3700W/probewouldbesustainablefordoubleU- formancerate,wehave:5 𝐻𝑒𝑙𝑖𝑥 725 𝑊/𝐻𝑒𝑙𝑖𝑥 3625 𝑊 1 𝐷𝑜𝑢𝑏𝑙𝑒 𝑈 𝐵𝑒𝑛𝑑Experiment Data vedAug1to5,2014(4days)74.7 F51 Btu/hr- ‐ft- ‐ W9gal/min78.1 F/79.6 F1( )ThermalpropertiesfromverticalboreholeRMEH016
,2014(8days)51.9 F55 26Btu/hr- ‐ft- ‐ 4W9.8gal/min77.6 F/79.1 F1( ngMode2- 22,2014(4days)77.7 F56.4 88Btu/hr- ‐ft- ‐ F)19ft1.26Btu/hr- ‐ft- ‐ /min66.6 F/71.7 FRMEH017
Table5.CoolingMode2- 30,2014(4days)69.6 F58.0 88Btu/hr- ‐ft- ‐ F)19ft1.26Btu/hr- ‐ft- ‐ al/min78.1 F/83.2 43.9 F53.6 26Btu/hr- ‐ft- ‐ yLast72hr1945W9.9gal/min38.7 F/36.4 F1( )ThermalpropertiesfromverticalboreholeRMEH018
Table7.HeatingMode2- 27.0 F54.4 88Btu/hr- ‐ft- ‐ F)19ft1.26Btu/hr- ‐ft- ‐ 6hr3171W5.3gal/min39.7 F/34.7 eadystatesystems.𝑞 𝑚 𝐶! ficheatoffluid(Btu/lbm- ‐ F) T:AveragedtemperaturedifferencebetweenEWTandLWT( tscenario.Inturn,𝑚 𝑄 PM)ρ:Densityofthefluid(lbm/gal)RMEH019
𝑡 !𝑙𝑏𝑚 60𝑚𝑖𝑛𝑙𝑏𝑚𝑚 9.86 0.1337 62.72 ! And,𝑙𝑏𝑚𝐵𝑡𝑢𝐵𝑡𝑢𝑞 4961 0.964 2.29 𝐹 10952ℎ𝑟𝑙𝑏𝑚 curacy.RMEH0110
Appendix A. Test Schedule SheetRMEH0111
Appendix B. Experiment ollowingdates: CoolingHelixTrial1:01- ‐Ago- ‐14–05- ‐Ago- ‐14 CoolingHelixTrial2:10- ‐Oct- ‐14–18- ‐Oct- ‐14 CoolingVerticalBoreholeTrial1:18- ‐Jul- ‐14–22- ‐Jul- ‐14 CoolingVerticalBoreholeTrial2:26- ‐Ago- ‐14–30- ‐Ago- ‐14 HeatingHelix:09- ‐Feb- ‐15–14- ‐Feb- ‐15 HeatingVerticalBorehole:02- ‐Mar- ‐15–06- ‐Mar- ‐15RMEH0112
Appendix C. Data Collection information):RSCDataPoints RAUGEOEnteringWaterTemperature(EWT) RAUGEOLeavingWaterTemperature(LWT) HeatPumpSupplyWaterTemperature(SWT) HeatPumpReturnWaterTemperature(RWT) BufferTankTemperature OutdoorAirTemperatureNIDataPoints BoreholesTemperatures GeoFieldFlowRate HeatPumpFlowRate HeatPumpEnergyUsageRMEH0113
Appendix D. Experiment igure9.InstallationofahelixprobeRMEH0114
Figure10.Sensorinstallationonavertical2- wardsthehouseRMEH0115
Appendix E. References1. Submittal153.RAUGEO 66708/ps153- ‐raugeo- ‐helix.pdf2. BaroidIDP(2011).BAROIDBarotherm ididp.com/public idp/pubsdata/Data Sheets/A H/BAROTHERM%20GOLD.pdf3. /dx.doi.org/10.1016/j.apenergy.2012.09.0124. artHouse,Bozeman,MT.GRTI.Bowie,TX.5. 6. niversity.Bozeman,MT.7. .AmericanSocietyofHeating,RefrigeratingandAir- nergy.RMEH0116
RMEH!01! 1! Executive Summary e! which!can!be .
