OPTIMIZATION DESIGN FOR THE HEAT-EXCHANGE CONDITIONS OF THE SEWAGE SOURCE HEAT PUMP SYSTEM

In terms of the characteristics of the city untreated sewage source heat pump system, this paper puts forward an integrated optimal mathematical model with an objective function of the annual total costs (the sum of the initial cost and the operating cost) by analyzing the relationship of the optimal operating parameters and their influencing factors according to the technical and economic optical principle. In order to improve the performance of the sewage source heat pump on the different using conditions. A computation program is also developed. On the premise of ensuring the units to fulfill the heating and cooling requirements of buildings, this model is used to calculate and optimize some key operating parameters and components to different temperature of the sewage. This paper gives the optimal systemic design parameters by combining with the actual case, and analyzes the influences of several parameters variation for the annual total costs and the performance of the system. This method combines the reliability and economy of heating and cooling and achieves the most optimal match of each part of the system. The present method will lead to a greater improvement in the integrated performance of the sewage source heat pump system than conventional method.