30 September 2014

Large scale and city level ground source heat pump system

A large number of ground-source heat pumps (GSHP) systems have been used in residential and commercial buildings in different climate zones in China because it was considered as an environmentally-friendly and cost-effective alternative with potential to
replace fossil fuels and help mitigate global warming by the central government since 2006. The total floor area that uses this technology is nearly 10 times at the end of 2012 compared
with 2006. Ground heat exchanger heat pump system in China are always used for large scale residential and commercial building with the floor area more than 20,000 m2 and some
surface water and sea water heat pump system could reach to city level, such as provide heating and cooling with several large GSHP energy station for an new district with the building floor area more than 5 million m2. At the same time, how to planning, design and operation such large system correctly to achieve higher COP is still needed to be answered. With latest research and development information of large scale and city level GSHP
collected from EU, USA and Japan, this paper raise a series of questions that needed to be solved in China in the future to keep promoting this technology, such as simultaneity usage
coefficient of different buildings selection in one district, more accurate TRT and ground water flow consideration during the load calculation, heat extraction and rejection Point selection and control strategy for hybrid system.