The Analysis And Assessment Of District Cooling Schems In Cloud Computing Industrial Park

At present stage, advocating low carbon concept is committed to improve the efficiency of energy utilization, encouraging the development of environmentally friendly energy systems in our country. Using the district cooling technology can reduce the cooling and heating source and power system capacity and palys a positive role on reducing energy consumption and pollutant emissions. In recent years district cooling is widely used and fast developmentFirstly, classified cloud computing park buildings into three types, which are class room building, office building and residential building. For these three types of buildings, testablish the standard building models, by using the software of DeST can simulated calculation the all-year hourly dynamic cooling and heating load. Then, by using the regional load forecasting method can figure out the peak heating load of the cloud computing park is 8801.2 kW and the peak cooling load of the cloud computing park is 238234.2 kW.Secondly, the available conventional sources of energy in the park, heat source existing in the park and renewable energy(solar energy, shallow water) are analyzed, and combined with the principle of the selection of cold and heat source, two schemes of district cooling have been proposed, they are centralized heating modes of river water source heat pump and steam double-effect lithium bromide absorption unit centralized district cooling scheme. For comparison, also proposed a conventional cooling and heating scheme.Thirdly, based on the idea of value engineering the life cycle cost and functionality of the three schems are been analyzed. Water source heat pump district cooling and heating scheme has the highest score of function, although its initial investment cost is the highest but as the life time operating cost is lowest makes its life cycle cost coefficient is lowest, and its value coefficient of 1.076 is the highest in three schmes; conventional distributed cooling and heating scheme function score is lowest, although its initial investment cost minimum due to the high life time operating cost, make its value coefficient is 0.907, the lowest in the three schems.Then, by using the method of the end-point, three schemes’ s environmental load of the life cycle were analyzed, and in the life cycle, the water source heat pump district cooling and heating scheme of the environmental load is 6.39% less than conventional distributed cooling and heating scheme, double-effect lithium bromide absorption unit for the environmental load is 67.13% less than conventional distributed cooling and heating scheme. From the perspective of human health and ecological environment sustainable development, two district cooling scheme is more environmentally friendly than conventional scheme, and the double-effect lithium bromide absorption unit scheme is the best.Finally, a new index—cost benefit index(CBI)has been proposed, and the index is used for comprehensivly evaluating the relationship of cost, functionality and environmental implication. The cost benefit coefficient of the two district cooling a schemes were been analyzed, respectively were 1.34 and 6.02, indicated that incremental cost of double-effect lithium bromide absorption unit can benefit more than incremental cost of water source heat pump, and double-effect lithium bromide absorption unit is an optimal scheme for district cooling.