23 September 2011
In this paper, the principles and methods for designing a software program are demonstrated. The program simulates the thermal performance of a shallow lake that
functions as a supplemental heat rejecter of ground water-source heat pump systems. Chongqing, one of the municipalities in China, has an advantage to apply water-source heat
pump system due to the abundant water resources in its area. As the water is one of renewable energy resources, the application of water-source heat pump system would contribute to the reduction of greenhouse gas emissions and the amelioration of the adverse
impact to built environments. The developed software was applied to the project to reconstruct a school building in Chongqing. The programming, verification, parameter testing and optimization of the software are shown in this paper. The energy saving rate of the ground water-source heat pump system against an electrically heated boiler is predicted as could be 74.86% and that is equivalent to 432375.2 kW·h of electricity consumption. The
software also predicts the environmental effect. Decrease of water temperature by 0.62°C during the operation of the lake water-source heat pump system satisfies the environmental protection requirement in Chinese standard GB3838-2002.