1. Case study the “GEOCOOL” heat pump system in UPV campus
José M. Corberán
Instituto de Ingeniería Energética
Universidad Politécnica de Valencia
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

2. GEOCOOL Geothermal Heat Pump for Cooling-and Heating
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, José M. Corberán

3. GEOCOOL Geothermal Heat Pump for Cooling-and Heating
THE FIFTH FRAMEWORK PROGRAMME
GEOCOOL
Geothermal Heat Pump
for Cooling-and Heating
along European Coastal Areas
UPV UNIVERSIDAD POLITÉCNICA DE VALENCIA Spain
GROHOL GROENHOLLAND Holland
CIATESA Compañía Industrial de Aplicaciones Térmicas S.A. Spain
AUTH Aristotle University of Thessaloniki Greece
ENEA Ente per le Nuove Tecnologie, l’Energia e l’Ambiente Italy
AEDIE Asociación para la Investigación y la Diagnosis de la Energía Spain
Duration: 3 years Feb
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

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, José M. Corberán

5. Ground Source HE main parameters
BOREHOLE
Configuration: 6 : 2 x 3, rectangle
Borehole depth m
Borehole spacing 3 m
Borehole installation SINGLE-U
Borehole diameter m
U-pipe diameter m
U-pipe thermal conductivity W/m·K(Polyethylene)
HEAT CARRIER FLUID: Water
HEAT PUMP: IZE70 + R (UPV-CIATESA)
GROUND(test IN-SITU)
Ground thermal conductivity W/m·K
Volumetric heat capacity 2.4MJ/m3·K
Ground surface temperature °C
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

6. Hydr. switch
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

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, José M. Corberán

8. Ground Source HE
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

9. GeoCool data acquisition system
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, José M. Corberán

10. Internal hydraulic group
Analysis of data
Internal hydraulic group
Heat pump system
Building
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

11. GeoCoolizer Instantaneous values Cooling/Heating capacity
Absorbed/Transferred capacity from/to the ground
Instantaneous COP
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

12. Integrated or averaged values
GeoCoolizer
Integrated or averaged values
Heating and cooling load
Total energy absorbed/ transferred from/to the ground
- From 7 a.m to 10 p.m
- The selected period
(one week, all the season…)
Electric energy
Seasonal Performance Factor (SPF)
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

13. Dynamic behaviour Cooling Mode
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

14. System performance in heating mode
Experimental results
System performance in heating mode
COP – WW
SPF – WW
COP – AW
SPF - AW
SUMMER
3.46
73 %
2.00
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

15. Total electricity savings
Two systems with the same heating load 42
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

16. Heating mode – Return WT
SUMMER
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

17. Energy distribution in heating
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

18. COP and SPF in cooling mode
4.36
COP – WW
SPF – WW
COP – AW
SPF - AW
60 %
2.72
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

19. Total electricity savings
Two systems with the same cooling load
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

20. Cooling mode - Return WT
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

21. Energy distribution in cooling
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

22. JANUARY 2005-APRIL 2010

23. SYSTEM OPTIMIZATION
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

24. OPTIMUM FLOW RATES: Cooling mode
20%
25%
Pump freq. (Hz)
Pump freq. (Hz)
Both pumps at same speed
40%
Pump freq. (Hz)
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

25. OPTIMUM FLOW RATES: Cooling mode
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

26. OPTIMUM FLOW RATES: Cooling mode
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

27. OPTIMUM FLOW RATES: Cooling mode
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

28. OPTIMUM FLOW RATES: Cooling mode
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

29. MODELLING WITH TRNSYS
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

30. TRNSYS MODEL
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

31. BUILDING THERMAL LOADS: Calculated vs. experiments
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

32. DAILY TEMPERATURES: Calculated vs. experiments
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán

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.
Seminar: GSHP Systems of High Efficiency – The Ground-Med case study. Madrid, June 23, José M. Corberán