Geothermal heat pump application for space cooling in Kamphaengphet, Thailand
Geothermal heat pump application for space cooling in Kamphaengphet, Thailand
复制标题
地热热泵在泰国甘烹碧的空间冷却应用
DOI：
10.9795/bullgsj.60.491
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
O. Lorphensri
中科院分区：
文献类型：
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作者：
K. Yasukawa;I. Takashima;Y. Uchida;N. Tenma;O. Lorphensri
地热热泵(GHP)供暖和制冷系统可能是降低能源消耗和解决环境问题的有力替代方案。它的集约利用可以通过将化石燃料锅炉更换为地源热泵来减少二氧化碳和其他有毒气体的排放。这也可能对解决城市热岛现象做出很大贡献。地源热泵的高性能和热负荷的降低相结合，为人口稠密城市的空调节省了几个百分点的电力。地源热泵一般不适用于热带地区的空间冷却。由于热带地区地下温度一般高于年平均气温，且全年大气温度基本不变，地下可能不适合作为冷热源。然而，根据泰国湄南河平原的地下水温度调查结果，在几个城市，地下温度在四个月以上的时间里低于白天大气温度5K或更多(本期为Yasukawa等人，2009年)。因此，即使在热带地区的部分地区，地下也可以用作冷热源。泰国Kamphaengphet安装了一个地源热泵系统，包括钻孔热交换器、热泵和风机盘管，用于室内制冷。在系统运行期间，监测了地下换热管和二次流体等的温度。本文介绍了温度测量和系统性能计算的结果。Tenma等人提出了地下换热系统的容量。(2009)在本期中。虽然Kamphaengphet的浅层次表层温度较高，不太适合用于冷却系统，但实验结果可以应用于其他地区。因此，通过本次试验和区域地下水调查，将会找到更适合地源热泵系统的地方。
Geothermal heat pump (GHP) system for heating and cooling purposes may be powerful alternative to reduce energy consumption and to contribute to environmental issues. Its intensive utilization may reduce emissions of CO2 and other toxic gases by replacing fossil fuel boiler into GHP. It may also greatly contribute to solve the problem of urban heat island (UHI) phenomenon. Combination of high performance of GHP and reduction of UHI result in a few percent of saving electricity for air conditioner in highly populated cities. GHP is generally not appropriate for space cooling in tropical regions. Since subsurface temperature is generally higher than year-average atmospheric temperature and atmospheric temperature is almost constant through a year in tropics, underground may not be appropriate as “cold heat-source”. However, according to the result of groundwater temperature survey in the Chao-Phraya plain, Thailand, subsurface temperature is lower than daytime atmospheric temperature for 5K or more over four months in several cities (Yasukawa et al., 2009, in this issue). Thus underground may be used as cold heatsource even in parts of tropical regions. A GHP system, borehole heat exchanger, heatpump and fan-coil, was installed for room cooling in Kamphaengphet, Thailand. Temperatures in the subsurface heat exchange tube and of secondary fluid, etc., were monitored during operation of the system. The results of temperature measurements and calculation of system performances are introduced in this paper. Capacity of the subsurface heat exchange system is presented in Tenma et al. (2009) in this issue. Although shallow subsurface temperature in Kamphaengphet is rather high and not quite suitable for a cooling system, the experimental results can be applied for other regions. Thus places more suitable for GHP system will be found as a result of this experiment and regional groundwater survey.