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Case study the GEOCOOL heat pump system in UPV campus 1 Jos M. Corbern Instituto de Ingeniera Energtica Universidad Politcnica de Valencia Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 2 2 THE FIFTH FRAMEWORK PROGRAMME GEOCOOL Geothermal Heat Pump for Cooling-and Heating along European Coastal Areas Project No: NNE5 2001 00847,July 2002 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 3 3 THE FIFTH FRAMEWORK PROGRAMME GEOCOOL Geothermal Heat Pump for Cooling-and Heating along European Coastal Areas UPVUNIVERSIDAD POLITCNICA DE VALENCIA Spain GROHOLGROENHOLLANDHolland CIATESACompaa Industrial de Aplicaciones Trmicas S.A.Spain AUTH Aristotle University of ThessalonikiGreece ENEAEnte per le Nuove Tecnologie, lEnergia e lAmbienteItaly AEDIE Asociacin para la Investigacin y la Diagnosis de la EnergaSpain Duration:3 years Feb. 2003 - 2006 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 4 4 GEOCOOL OBJECTIVES To design, construct and demonstrate a GSHP case system in order to produce fair and rigorous data about the: Energy saving potential in comparison to a realistic nowadays alternative system Economic and technical feasibility of GSHP technology in our area Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 5 BOREHOLE Configuration:6 : 2 x 3, rectangle Borehole depth50 m Borehole spacing3 m Borehole installationSINGLE-U Borehole diameter0.14 m U-pipe diameter0.032 m U-pipe thermal conductivity0.430 W/mK(Polyethylene) HEAT CARRIER FLUID:Water HEAT PUMP:IZE70 + R290 (UPV-CIATESA) GROUND (test IN-SITU) Ground thermal conductivity1.800 W/mK Volumetric heat capacity2.4MJ/m3K Ground surface temperature18.5 C 5 Ground Source HE main parameters Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 6 6 Hydr. switch Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 7 7 Ground Source HE Backfilling: sand (course and fine) or sand/bentonite alternative use of spacers Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 8 Ground Source HE 8 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 9 GeoCool data acquisition system 9 44 sensors in the loop (PT100, coriolis mass flowmeters and wattmeters) On site automatic meteorological station w. 22 parameters 1 min sampling during 1 year 44 sensors in the loop (PT100, coriolis mass flowmeters and wattmeters) On site automatic meteorological station w. 22 parameters 1 min sampling during 1 year Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 10 Analysis of data 10 Internal hydraulic group Heat pump system Building Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 11 GeoCoolizer 11 Cooling/Heating capacity Absorbed/Transferred capacity from/to the ground Instantaneous COP Instantaneous values Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 12 Integrated or averaged values 12 Electric energy - From 7 a.m to 10 p.m - The selected period (one week, all the season) Seasonal Performance Factor (SPF) Heating and cooling load Total energy absorbed/ transferred from/to the ground GeoCoolizer Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 13 Dynamic behaviour 13 Cooling Mode Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 14 System performance in heating mode 14 3.46 2.00 73 % Experimental results Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern COP WW SPF WW COP AW SPF - AW SUMMER Slide 15 Total electricity savings 15 Two systems with the same heating load 42 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 16 Heating mode Return WT 16 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern SUMMER Slide 17 Energy distribution in heating 17 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 18 COP and SPF in cooling mode 18 4.36 2.72 60 % COP WW SPF WW COP AW SPF - AW Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 19 Total electricity savings 19 Two systems with the same cooling load Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 20 Cooling mode - Return WT 20 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 21 Energy distribution in cooling 21 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 22 JANUARY 2005-APRIL 2010 Slide 23 23 SYSTEM OPTIMIZATION Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 24 24 20% 25% 40% Both pumps at same speed Pump freq. (Hz) Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern OPTIMUM FLOW RATES: Cooling mode Slide 25 25 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern OPTIMUM FLOW RATES: Cooling mode Slide 26 26 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern OPTIMUM FLOW RATES: Cooling mode Slide 27 27 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern OPTIMUM FLOW RATES: Cooling mode Slide 28 28 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern OPTIMUM FLOW RATES: Cooling mode Slide 29 MODELLING WITH TRNSYS 29 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 30 TRNSYS MODEL 30 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 31 BUILDING THERMAL LOADS: Calculated vs. experiments 31 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern Slide 32 32 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern DAILY TEMPERATURES: Calculated vs. experiments Slide 33 Conclusions In heating mode, GSHP saves, in terms of primary energy consumption, 41% compared to the air to water roof top system. In cooling mode a 38% saving was obtained. The impact in electricity consumption of the auxiliary elements of the HVAC system was found to be large and should be taken into account to improve overall system efficiency, Capacity adaptation strategies are needed to improve load factor and efficiency of (both) systems. Improved control strategies are being investigated. 33 Seminar: GSHP Systems of High Efficiency The Ground-Med case study. Madrid, June 23, 2010 Jos M. Corbern