| Dongduan area located on the edge of Pearl River where with abundant surface water resource and air condition system is the basic requirement in local architecture, so it is necessary to research the feasibility of Surface Water Source Heat Pump(SWHP) used for public building air conditioning system in Dongduan area. This paper first introduce the classification and working principle, and then basic on the weather condition and water resource and energy consumption of local area build a lake water thermodynamic Model, apply program Visual Basic6.0 to check the accuracy of the Model. Combine two project cases analog and compute the lake water variation condition under SWHP working condition, demonstrate the technical feasibility of SWHP in Dongduan area, and build economic model, compare and analyze the economy and energy conservation. The conclusion as fellows:(1)The research shows that open type SWHP used in Project A working under the maximum cold load a week can get 1.1℃water temperature increase in summer, not meet the demand of GB3838-2002 Enriromental quality standards for surface water,while closed type SWHP can get 0.38℃in Project B at same operating condition in summer and get 0.08℃water temperature increase in winter, meet the demand of GB3838-2002 Enriromental quality standards for surface water.(2)Economic model analysis shows that initial investment of SWHP is highest while annual operational cost is least; static state payback time of SWHP in project A compare to chiller system is 5.6 years, compare to air-cooled unit system is 4.5 years; static state payback time of SWHP in project B compare to gas fired-boiler with chiller system is 2.4 years.(3)Energy analysis results shows that SWHP system in project A save 1.2 tons and 3.3 tons standard coal each year compare to chiller system and air-cooled unit; SWHP system in project B save 1123 tons standard coal each year compare to gas fired-boiler with chiller system. |
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