Subsurface thermal influence of experimental geothermal heat pump system operation for space cooling in Kamphaengphet, Thailand
Subsurface thermal influence of experimental geothermal heat pump system operation for space cooling in Kamphaengphet, Thailand
复制标题
泰国甘烹碧空间冷却实验地热热泵系统运行的地下热影响
DOI：
10.9795/bullgsj.60.503
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
G. Zyvoloski
中科院分区：
文献类型：
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作者：
N. Tenma;K. Yasukawa;I. Takashima;Y. Uchida;O. Lorphensri;G. Zyvoloski
利用自然能源（太阳能、风能、生物质能等）可能有助于减缓全球变暖。低温地热资源是比较丰富的自然能源之一。利用低温地热资源的方法包括直接利用温暖的地下水和地热热泵系统。GHP系统可细分为两种基本类型。一种是利用地下管道中的水循环，管道与当地地下含水层之间没有直接的质量交换（“封闭系统”）。另一种是直接抽取加热的地下水（“开放系统”）。GHP系统在世界范围内广泛使用（Rybach等人，2000; Fridleifson，2001;隆德，2005）。在瑞典，2005年每100人的GHP系统安装数量约为2台（Curtis等人，2005年）。由于地下温度稳定，一般认为GHP系统可以在任何地方使用。然而，GHP系统的适用性是不清楚的空间冷却在热带地区，地下和大气之间的温差可能不会被期望足够的。为了掌握GHP系统在热带地区用于空间冷却的适用性，从2006年10月至2008年3月在泰国Kampaengphet进行了GHP系统的实验操作（Yasukawa等人，2009年）。安装U形管的换热钻孔的深度为56 m。作者在U型管内每隔10米设置一个温度传感器（分别在0、6、16、26、36、46和56米的深度）。作为GHP系统的详细内容，Yasukawa等人（2009）提出了温度测量和系统性能计算的结果。在本期中，我们试图通过从该测试中获取地下温度数据来估计GHP系统对空间冷却的地下热影响。
Using natural sources of energy (solar, wind, biomass etc.) may potentially help to mitigate global warming. Low-temperature geothermal resources are among the more abundant natural energy sources. Methods of utilizing low-temperature geothermal resources include both direct use of warm groundwater and geothermal heat pump (GHP) systems. GHP systems may be subdivided into two basic types. One uses water circulated through a subsurface pipe without direct mass exchange between the pipe and the local groundwater aquifer (“closed system”). The other involves direct withdrawal of heated groundwater (“open system”). GHP systems are popularly used worldwide (Rybach et al., 2000; Fridleifson, 2001; Lund,2005). In Sweden, the number of GHP system installation per 100 people in 2005 is about two (Curtis et al., 2005). It is generally considered that GHP systems may be utilized everywhere because of stable temperature of the underground. However, the applicability of the GHP system is not clear for space cooling in tropical region where sufficient temperature difference between underground and atmosphere may not be expected. Aiming at grasping the applicability of GHP systems for space cooling in tropical region, an experimental operation of a GHP system was conducted at Kamphaengphet, Thailand from October, 2006 to March, 2008 (Yasukawa et al., 2009). The depth of the heat exchange borehole, in which U-tube was installed, was 56m. The authors set temperature sensors every ten meters inside the U-tube (at depths of 0, 6, 16, 26, 36, 46 and 56 meters, respectively). As the detail of the GHP system, the results of temperature measurements and calculation of system performances are presented in Yasukawa et al. (2009) in this issue, we attempted to estimate subsurface thermal influence of the GHP system for space cooling by acquiring temperature data of the underground from this test.