Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 79, Issue -, Pages 334-343Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2013.11.045
Keywords
Heating; Ground source heat pump; Absorption heat pump; Borehole free cooling; Thermal imbalance; Primary energy efficiency
Categories
Funding
- National Natural Science Foundation of China [51125030]
- National Basic Research Program of China [2010CB227305]
Ask authors/readers for more resources
Ground source absorption heat pumps (GSAHPs) extract less heat from the ground than ground source electrical heat pumps (GSEHPs) and therefore require fewer boreholes and can reduce the deterioration in heating performance. GSAHP integrated with borehole free cooling is proposed to reduce the thermal imbalance further and keep the heat pump system working efficiently for a longer period. Dynamic simulations of different applications in three typical cities are conducted in TRNSYS to investigate the potential of GSAHP + borehole free cooling. The results show that the soil temperature reduction for GSAHP can reach 6-7 degrees C after 10 years but can be reduced to 0-3 degrees C by floor radiation cooling, and the coefficient of performance (COP) and heating capacity can be kept at a high level. Moreover, the unguaranteed heating hours can be greatly reduced, while the guaranteed cooling hours are in the range of 800-1500 in different areas. Additionally, the primary energy efficiency of GSAHP with heating only is 95-120%, while that of the hybrid GSAHP + borehole free cooling can reach 111-156% in typical cities. The proposed system provides additional cooling and indoor comfort while also reducing the underground thermal imbalance, slowing the deterioration of soil temperature and system performance, improving the heating reliability, and reducing the system's energy consumption. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available