Abstract
The paper presents the results of observations of a brine-to-water a solar-assisted ground-source heat pump (SAGSHP) system located in building “INNO–EKO–TECH Innovative Research and Didactic Center for Alternative Energy Sources, Energy Efficient Construction and Environmental Protection” in the Bialystok University of Technology, north-east Poland. As the heat source of the system are three vertical ground heat exchanger (VGHE), length 70, 85 and 100 m. Independently, there are three control probes to monitor the temperature in the vicinity of VGHEs. The experimental results indicate that soil temperature raises from 0.2°C for 5 m distance, up to 0.5°C for 5 m distance.
Highlights
A large number ground source heat pump (GSHP) systems are used in the world
The performance of a solar-assisted ground-source heat pump (SAGSHP) system is a new type of high efficiency, energy saving and environmental protection air-conditioning technology
The results indicate that the excess solar energy collected during day can be stored in ground by the GHE to improve the operation performance of GSHP during night
Summary
A large number ground source heat pump (GSHP) systems are used in the world. The advantage of this kind of system is relatively stable temperature of the ground and high efficiency and environmental friendliness. The performance of a solar-assisted ground-source heat pump (SAGSHP) system is a new type of high efficiency, energy saving and environmental protection air-conditioning technology. Solar thermal collectors can balance ground loads over a yearly cycle and can assist in maintaining more efficient heat pumps, with the results, soil temperature raised by 0.2oC. A systematic review on the past and present solar assisted heat pump systems for low temperature water heating applications was describe in [6]. Yang et al [7] experimental studies and numerical simulation on the performance of a solar-ground source heat pump system operated in different heating modes were presented. The numerical simulation of a solar assisted ground coupled heat pump system which can provide both space heating and domestic hot water was presented by Chen and Yang [10]. The use of the solar thermal energy for heat storage is recommended by using VGHE as low source of energy for compressor heat pump
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