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地源热泵在地铁工程中的应用分析
【作者】 刘越；
【导师】 廖胜明；
【作者基本信息】 中南大学 ， 供热、供燃气、通风及空调工程， 2010， 硕士
【摘要】 地下铁道是解决现代城市交通拥挤问题的有效手段,今后的二、三十年是我国城市轨道交通发展的高峰期。地铁运量逐年升高,列车对数和速度逐渐加大,地铁环控系统能耗因此逐年增加。然而由于我国能源问题的日益严重,社会各方面都意识到对能源的有效利用和节能的重要性。地铁环境控制系统是整个地铁工程的重要组成部分,地铁环控系统能耗占地铁能耗的50%以上,节约环控系统能耗对节省地铁运营费用有重要的意义。因此如何优化设计地铁环控系统,降低环控系统运行费用,是值得关注的一个重要课题。地源热泵空调系统利用大地作为冷热源,通过中间介质在埋设于地下的封闭环路中循环流动与大地进行热量交换,进而由热泵实现对建筑物的温湿度调节。与传统空调方式相比,地源热泵空调系统利用可再生能源,具有节能和环保的特点,近年来一些学者对地源热泵在地铁工程中的应用进行了初步的探讨。然而地铁车站空调系统大多为夏季单季节运行,冬季无需供热,这使得地源热泵系统在地铁工程应用中不能充分发挥其效应。针对这一问题,本文提出了应用一套土壤源热泵系统夏季为地铁车站提供冷量,冬季为附近建筑提供热量的系统方案,并结合工程实例进行设计计算,得出一个标准地下车站的冷负荷所能匹配供热面积的计算方法。借助Trnsys软件对系统进行模拟,确定方案可行,同时对地源热泵系统方案和常规空调系统方案进行了能耗和经济性的分析,为地源热泵地铁环控的系统设计和运营提供参考。
【Abstract】 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。