Building and Use
1
Advanced ground source heat pump systems for heating and cooling in Mediterranean climate Building and Use Building and Use Heating & Cooling System Heating & Cooling System Energy Energy P P erformance erformance POLYTECHNIC UNIVERSITY OF VALENCIA CAMPUS DEMO SYSTEM, SPAIN Prof. José Miguel Corberán Salvador Prof. José Miguel Corberán Salvador PhD. Carla Montagud PhD. Carla Montagud UNIVERSITAT POLITÈCNICA DE VALÈNCIA UNIVERSITAT POLITÈCNICA DE VALÈNCIA Borehole Heat Exchanger (HEX) Borehole Heat Exchanger (HEX) Heat Pump Heat Pump Air conditioned spaces in building The UPV demo site is located in an institutional building (5J) at the Polytechnic University of Valencia in Spain. The building includes corridors, offices, computer and service rooms and other facilities. Total area of air-conditioned spaces: 250 m 2 Aver. annual air temp. : 17.3 ºC Aver. annual air rel. humidity : 68 % Heat power demand: 17 kW Cooling power demand: 15 kW building photo Ground Source HEX, single-U tube, HDPE, Ø 25 mm. 6 boreholes in a 2x3 rectangular grid (18 m 2 ) are connected in a balanced parallel configuration. Every borehole is back-filled with a different filling. Borehole depth : 50 m Borehole diameter : 150 mm Borehole spacing : 3 m Heat transfer fluid : water Soil Parameters General soil profile: gravel & clay Thermal conductivity: 2 W/m·K Volumetric heat capacity: 3000 kJ/K·m 3 BHE field cross section photo 1 photo 2 Monthly Energy Monthly Energy Delivered Delivered Monthly loads [kW·h] UPV building (demo site location) Water temperature evolution (1 operational day, cooling mode). Energy performance of Ground-Med heat pump compared to the Geo-Cool one. The already existing heat pump from the Geo-Cool EU project was replaced by a new one manufactured by HIREF, model GSH212SX, designed specifically for the GROUND- MED project. It consists of a reversible water to water heat pump which works with R410A. It is reversible on both the refrigerant and the secondary fluid (water) sides. It comprises two brazed plate heat exchangers and two Copeland compressors working in tandem in order to be able to adapt the heat pump capacity to the building energy demand. Water temperature conditions Water temperature conditions User Side Water Temperatures (Chiller) IN/OUT [°C] 15/10 User Side Water Temperatures (Heat Pump) IN/OUT [°C] 35 / 40 Source Side Water Temperatures (Chiller) IN/OUT [°C] 26 / 32 Source Side Water Temperatures (Heat Pump) IN/OUT [°C] 15/10 Heat pump operating parameters Heat pump operating parameters Chiller Cooling Capacity @ 15/10°C ; 32/26°C [kW] 17,2 Compressor Absorbed Power [kW] 2,8 Compressor Absorbed Current [A] 6,3 EER [-] 6,1 User side water-flow [l/h] 2.958 User side pressure drops [kPa] 14 Source side water-flow [l/h] 2.847 Source side pressure drops [kPa] 12 Heat-Pump Heating Capacity @ 35/40°C ; 15/10°C [kW] 19,2 Compressor Absorbed Power [kW] 3,6 Compressor Absorbed Current [A] 7,2 COP [-] 5,3 User side water-flow [l/h] 3.302 User side pressure drops [kPa] 15 BCE BCI G RO UND HEAT EXCHANG ER IN TER N AL TAN K FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL FAN CO IL W ATER TO W ATER HEAT PUM P EXTERNAL CIRC U IT IN TER N AL CIRC UIT 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 0:00:00 2:24:00 4:48:00 7:12:00 9:36:00 12:00:00 14:24:00 16:48:00 19:12:00 21:36:00 0:00:00 2:24:00 Tem perature (ºC ) Time TIC inlet(ºC ) TIC outlet(ºC ) TEC inlet(ºC ) TEC outlet(ºC ) Ttank outlet(ºC ) 0 500 1000 1500 2000 2500 3000 3500 1 2 3 4 5 6 7 8 9 10 11 12 Heating (kW h) Cooling (kW h)
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Polytechnic University of Valencia CAMPUS DEMO SYSTEM, SPAIN Prof. José Miguel Corberán Salvador PhD. Carla Montagud UNIVERSITAT POLITÈCNICA DE VALÈNCIA. Building and Use. Heating & Cooling System. Heat Pump. building photo. photo 1. - PowerPoint PPT Presentation
Transcript of Building and Use
Advanced ground source heat pump systems for heating and cooling in Mediterranean climate
Building and UseBuilding and Use Heating & Cooling SystemHeating & Cooling System
Energy Energy PPerformanceerformance
POLYTECHNIC UNIVERSITY OF VALENCIA CAMPUS DEMO SYSTEM, SPAIN
Prof. José Miguel Corberán SalvadorProf. José Miguel Corberán SalvadorPhD. Carla Montagud PhD. Carla Montagud
UNIVERSITAT POLITÈCNICA DE VALÈNCIAUNIVERSITAT POLITÈCNICA DE VALÈNCIA
Borehole Heat Exchanger (HEX)Borehole Heat Exchanger (HEX)
Heat PumpHeat Pump
Air conditioned spaces in building
The UPV demo site is located in an institutional building (5J) at the Polytechnic University of Valencia in Spain. The building includes corridors, offices, computer and service rooms and other facilities.
Total area of air-conditioned spaces: 250 m2
Aver. annual air temp. : 17.3 ºC Aver. annual air rel. humidity : 68 %
Heat power demand: 17 kWCooling power demand: 15 kW
building photo
Ground Source HEX, single-U tube, HDPE, Ø 25 mm. 6 boreholes in a 2x3 rectangular grid (18 m2) are connected in a balanced parallel configuration. Every borehole is back-filled with a different filling.
Borehole depth : 50 m Borehole diameter : 150 mm Borehole spacing : 3 m Heat transfer fluid : water
Soil ParametersGeneral soil profile: gravel & clayThermal conductivity: 2 W/m·KVolumetric heat capacity: 3000 kJ/K·m3
BHE field cross section
photo 1
photo 2
Monthly Energy Monthly Energy DeliveredDelivered
Monthly loads [kW·h]
photo 1
UPV building (demo site location)
Water temperature evolution (1 operational day, cooling mode).
Energy performance of Ground-Med heat pump compared to the Geo-Cool one.
The already existing heat pump from the Geo-Cool EU project was replaced by a new one manufactured by HIREF, model GSH212SX,designed specifically for the GROUND-MED project. It consists of a reversible water to water heat pump which works with R410A. It is reversible on both the refrigerant and the secondary fluid (water) sides.
It comprises two brazed plate heat exchangers and two Copeland compressors working in tandem in order to be able to adapt the heat pump capacity to the building energy demand.
Water temperature conditionsWater temperature conditions
User Side Water Temperatures (Chiller) IN/OUT [°C] 15/10 User Side Water Temperatures (Heat Pump) IN/OUT [°C] 35 / 40 Source Side Water Temperatures (Chiller) IN/OUT [°C] 26 / 32 Source Side Water Temperatures (Heat Pump) IN/OUT [°C] 15/10
Heat pump operating parametersHeat pump operating parameters
Chiller Cooling Capacity @ 15/10°C ; 32/26°C
[kW] 17,2 Compressor Absorbed Power
[kW] 2,8 Compressor Absorbed Current
[A] 6,3
EER [-] 6,1
User side water-flow [l/h] 2.958
User side pressure drops [kPa] 14
Source side water-flow [l/h] 2.847
Source side pressure drops [kPa] 12
Heat-Pump Heating Capacity @ 35/40°C ; 15/10°C
[kW] 19,2 Compressor Absorbed Power
[kW] 3,6 Compressor Absorbed Current
[A] 7,2
COP [-] 5,3
User side water-flow [l/h] 3.302
User side pressure drops [kPa] 15
Source side water-flow [l/h] 2.718
Source side pressure drops [kPa] 12
BCE
BCI
GROUND HEAT EXCHANGER
INTERNAL TANK
FAN COIL
FAN COIL
FAN COILFAN COIL
FAN COILFAN COIL
FAN COIL
FAN COIL
FAN COIL
FAN COIL
FAN COIL
FAN COIL
FAN COIL
FAN COIL
WATER TO WATER HEAT PUMP
EXTERNAL CIRCUIT
INTERNAL CIRCUIT
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
27.5
0:00:00 2:24:00 4:48:00 7:12:00 9:36:00 12:00:00 14:24:00 16:48:00 19:12:00 21:36:00 0:00:00 2:24:00
Tem
pera
ture
(ºC
)
TimeTIC inlet (ºC) TIC outlet (ºC) TEC inlet (ºC) TEC outlet (ºC) Ttank outlet (ºC)
0
500
1000
1500
2000
2500
3000
3500
1 2 3 4 5 6 7 8 9 10 11 12
Heating (kWh)
Cooling (kWh)
