Ground Source Heat Pump In The Subway Project

As a main public transportation means for its efficiency in improving the traffic condition, subway will be developed rapidly in the future two or three decades in our country. The subway transportation elevates year by year, the train number and speed is gradually improved, the energy of the environmental control system of subway therefore increases year by year. But because of more and more serious of oil problem. every social aspect think it important to make efficient use of energy and save energy. The control of subway environmental systems is becoming more and more important in the subway engineering, The energy of the environmental control system of subway takes great proportion of the energy of subway. It is very important for decreasing the running charge to save it and attracts corporation and design department attention. So how to optimize the design of subway environmental control system and decrease its operating cost is an important topic worthy of concern。Ground source heat pump(GSHP)air conditioning systems utilize ground soil as a heat source/sink, achieve heat transfer between the ground soil and a working fluid(water or antifreeze solution)circulating in a closed loop buried in the ground. Compared to other conventional alternatives, the ground source heat pump system makes full use of renewable energy, and beasts the features of protecting the environment and reducing electric power consumption. In recent years, some research have been taken to discuss the application of ground source heat pump in the control of subway environmental systems。However, the conditioning system of subway stations mostly operates only in summer, as heating is unnecessary in a winter subway station. This results in the inefficiency of ground source heat pump in subway engineering appliance. To solve this problem, the thesis advances a system solution by the use of a set of ground source heat pump system. Combined with calculations by the reference of practical engineering cases, this system covers cold energy supply to subway station in summer and caloric supply to neighborhood architectures in winter. The thesis is concluded by the calculation method of heating area which matches the cooling load in standard subway stations. Trnsys software is applied to simulate the annual load, which proves the feasibility of the system solution. At the same time, an operating cost compurgation between using ground source heat pump technology and other programs has been taken, and author give some advices on the application of ground source heat pump in the control of subway environmental systems。...