Most of the energy consumption in a hot and dry area is used for the air-conditioning systems. This study aims to investigate the possibility of reducing the electricity consumption in air conditioners using ground cold energy to cool the hot fluid in the pipes. Several experiments were carried out to investigate the performance of the proposed system to be used in the weather conditions of Baghdad city (i.e., hot and dry). Two configurations of ground source heat exchangers (GSHEs) were developed and constructed. The first configuration comprised coil type with two different materials (copper and polyvinyl chloride [PVC]). The second configuration was the 3U type, which was made from copper, PVC, and galvanized. Three water flow rates were considered (5, 10, and 15 L/min) with water inlet temperatures (80 degrees C, 70 degrees C, and 60 degrees C). The experiments' results showed that the type of material of the pipe has a significant influence on both the heat transfer effectiveness and the system performance. Copper tubes were the best type of heat exchanger (type coil) to be used in this regard. The highest recorded values of the heat exchange rate were 5.81, 4.81, 2.72, 1.60, and 1.32 kW with an inlet temperature of 80 degrees C and a flow rate of 5 L/min for the case of copper coil, copper 3U, galvanized 3U, PVC profile, and PVC 3U, respectively. These findings can be used as a guideline for future studies of GSHEs, particularly for the applications fixed in unsaturated soils.
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机译：大部分的能源消耗在一个炎热和干燥用于空调系统。本研究旨在调查的可能性减少空气中的电力消耗护发素使用地面冷能源冷却热流体的管道。进行调查的性能提出了系统中使用的天气巴格达城市的条件(例如,炎热和干燥)。两个配置地源热能换热器(谷胱甘肽)和开发构造。用两种不同的材料(铜圈式和聚氯乙烯(PVC))。配置3 u型,从铜、PVC、镀锌。流量被认为(5、10和15 L / min)与水进口温度(80摄氏度,70度和60度)。实验的结果表明,材料的类型管有重大影响的热量传输效率和系统表演热交换器(线圈型)中使用把。汇率是5.81,4.81,2.72,1.60,1.32千瓦的入口温度80摄氏度和一个5 L /分钟的流量情况下的铜线圈、铜3 u,镀锌3 u PVC异型材分别PVC 3 u。作为未来的方针谷胱甘肽的研究,特别是对于应用程序固定不饱和土壤。
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