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Building and Use

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.

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Building and Use

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  1. Polytechnic University of ValenciaCAMPUS 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 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 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 Chiller Cooling Capacity @ 15/10°C ; 32/26°C [kW] 17,2Compressor 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 UPV building (demo site location) photo 2 Energy Performance 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. annualair temp.: 17.3 ºC Aver. annual  air  rel.  humidity :68 % Heat power demand:17 kW Cooling power demand: 15 kW photo 1 Water temperature evolution (1 operational day, cooling mode). Borehole Heat Exchanger (HEX) Energy performance of Ground-Med heat pump compared to the Geo-Cool one. BHE field cross section Monthly Energy Delivered Ground SourceHEX, 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 Boreholespacing :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·m3 Monthly loads [kW·h]    

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