Research On The Application Of Fresh-Water Source Heat Pumps In Chongqing

With the exhausting of primary energy, and the increasing deterioration of the global environment, energy saving and environmental protection are also mentioned in the international diplomatic agenda. China is also at a period of rapid urbanization, rapid development of construction makes energy consumption increase. People are seeking more comfortable and healthy living and working environment, a large number of air-conditioning systems are eating off almost 1/2 of building energy consumption. Therefore, studying energy-saving of air conditioning, reducing building energy consumption and environmental pollution, and achieving energy saving and environmental protection have profound and lasting significance.Fresh water source heat pump technology uses surface freshwater resources for the building heating and refrigeration. For the distribution of surface water's temperature is relatively stable in a year, and the water can absorb and store almost inexhaustible solar energy, so that the water-source heat pump technology has energy-saving, environmental protection, stable and renewable characteristics. Research and development of this technology is favored by more and more air-conditioning technicians.This paper relies on the carrying out of freshwater source heat pumps demonstration projects, the feasibility and operation effect of freshwater source heat pump technology in Chongqing was studied. The article first introduced the reseach progress of water-source heat pumps and its characteristics. For Chongqing is rich in freshwater resources, the advantages of using freshwater source heat pump technology in Chongqing is proposed, but there are also some key technical problems to be solved. Then the temperature of Chongqing Jialing River water is tested and analyzed, results show that the water temperature distribution are relatively stability in winter, and the average temperature is between 9.2 to 13.1℃. So the river water is a good source for winter heating. The simulation and test analysis show that the impact of proper capacity freshwater source heat pump which operates in the river water is very small. Two times sampling test and analysis prov that Chongqing Yangtze River water is very suitable for freshwater source heat pump technology application. The good quality and low sediment concentration make the water and water treatment technology for water source heat pump relatively easy. And then, the operation of Yangtze River water source heat pump system on cooling condition is tested, results show that the system EER is as high as 3.52, unit integrated EER is 5.09, the cooling effect is very good. Therefore, it has a good energy saving effect using Yangtze River water as heating or cooling resouces for freshwater source heat pumps. The water-water treatment technology for freshwater source heat pump was also discussed. After reviewing the water treatment technology and the development status both at home and abroad, six species common of water-water treatment technology of water source heat pumps, and how to choose suitable technical according to the features of river water in Chongqing area were introduced. Finally, a technological-economic feasibility analysis of water source heat pump technology application in practical project was introduced. Results prove again that freshwater source heat pump technology is suitable for Chongqing, seizing opportunity of the fresh water source heat pump demonstration project to develop this technology and make it applicate in large area in Chongqing.