【作者】 姚远；

【导师】 符永正；

【作者基本信息】 武汉科技大学 ， 环境工程， 2010， 硕士

【摘要】 地源热泵技术在国内处于飞速发展的阶段,相应的研究也越来越多。湖北省出入境检验检疫局实验楼空调工程是国家建筑节能示范工程,采用加入热回收部分的冷却塔——垂直地埋管混合式地源热泵系统作为空调方案。本文以该工程为例,介绍了地埋管换热器、热回收部分和冷却塔部分的设计方法,对工程实测数据进行了整理和分析,并利用DeST软件模拟计算各种空调方案的能耗情况,采用不同空调方案相比较的方法说明地源热泵系统的节能特性。对该工程实测所得数据进行整理和分析,可知地源热泵系统采暖季平均能效比为2.66,2010年3月1日至2010年3月15日系统运行稳定期间,系统能效比的平均值为2.83。采用DeST软件进行模拟计算,算得水冷螺杆机组+燃气锅炉空调方案在供热季的系统能效比为1.43,3月1日13:00至3月15日17:00系统能效比为1.36;直燃式溴化锂机组+冷却塔方案在供热季的系统能效比为0.92,3月1日13:00至3月15日17:00系统能效比为0.87。从能效比的比较可见,地源热泵系统节能特性显著。在运行费用计算中,根据样本数据可估算各空调方案的全年能耗,地埋管地源热泵系统的全年能耗是水冷机组+冷却塔+燃气锅炉方案的59.4%,是直燃式溴化锂机组+冷却塔方案的47.5%是风冷热泵方案的41%,由此也可看出地源热泵系统的节能性。利用DeST软件计算该建筑的冷热负荷,算得全年总冷负荷约为总热负荷的3倍,说明了武汉地区的建筑负荷特点,和造成土壤热平衡问题的主要原因。而从监测系统采集到的土壤温度数据可知,经过空调系统在采暖季向土壤吸取热量后,埋管区土壤温度呈下降趋势,地下四十米以下土壤温度平均下降了1.37℃,体现了地源热泵系统在应用中土壤温度的变化规律。比较地源热泵空调方案、水冷机组+冷却塔+燃气锅炉方案、直燃式溴化锂机组+冷却塔方案和风冷热泵方案的初投资和运行费用,可知地源热泵系统的初投资较高,但运行费用较低,以水冷机组+冷却塔+燃气锅炉方案为标准,其投资回收年限为4.3年。而在使用效果、环境影响、安全性以及操作和维护等方面地源热泵系统都有一定的优越性。更多还原

【Abstract】 The technology of ground source heat pump develop rapidly in our country. There are more and more researching in recent years. Entry Inspection and Quarantine Bureau in Hubei Province lab building air conditioning project is an energy-saving demonstration project of national, its air conditioning program used cooling tower——vertically underground pipe ground source heat pump system with heat recovery part. The project as an example in this article, to introduced the way of design of underground pipe heat exchanger, the part of heat recovery and the cooling tower. Reorganization and analysis the monitor date of the project. Use DeST software to did simulation and computation the energy consumption of various air conditioning conditions. Using the way of comparison with different air conditioning conditions to shows power-saving characteristic of ground source heat pump system.Collation and analysis the energy consumption of monitor date from March 2010, can be obtains the efficiency ratio of ground source heat pump system was 2.83.It’s higher than other air-conditioning programs, energy saving effect is obvious. Collation and analysis the soil temperature data from December 2009 to March 2010. We can see through the heat extraction system extraction the heat from soil, its temperature decreased. It was indicating the variation rule of soil temperature in the application of ground source heat pump system.Compared the initial investment and operating costs of the ground source heat pump program, water cooling unit + cooling tower + gas boiler program, direct-fired LiBr + cooling tower program and Air-cooled heat pump program. We can see the initial investment of ground source heat pump is higher but operating costs lower than others.Compared with water cooling unit + cooling tower + gas boiler program. The payback period is 4.4 years. Comparison of annual energy consumption of air conditioning scheme. The energy consumption of ground source heat pump system is 60.7% of water cooling unit + cooling tower + gas boiler program, 48.5% of direct-fired LiBr + cooling tower program, 41.8% of Air-cooled heat pump program. Obviously that ground source heat pump system can save power.更多还原