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Investigation of pipe materials and thermal conductivity of soil on the performance of ground heat exchanger operating under Malaysia climate
IOP Conference Series: Materials Science and Engineering Pub Date : 2021-02-20 , DOI: 10.1088/1757-899x/1078/1/012030
A M Aizzuddin 1 , T M Yusof 1 , W H Azmi 1
Affiliation  

In nature, renewable energy is inherently free and must be implemented. The use of air conditioning and refrigerants that affect global warming is a serious issue. In building applications, renewable energy from the geothermal source, namely ground heat exchanger (GHE), has great potential. The main concept of GHE is utilizing the ground as an infinite thermal reservoir for cooling and heating to the fluid medium. In the GHE system, the air is used as a fluid medium of work. Because of the temperature difference between the air and underground temperature, the air cools in summer and gets heated in winter. In this present work, a study has been conducted to investigate the effect of pipe materials and thermal conductivity of soil on the performance of the GHE. The study acknowledges that the pipe materials do not give a significant effect on the performance of the GHE. Therefore, the lower thermal conductivity of pipe materials with low cost can be used in GHE implementation. The study also revealed that the range of thermal conductivity of soil which gives good ground heat exchanger performance is between 1.5 to 5 W/mK. Besides, the length of the pipe was reduced from 25 to 10 meters.



中文翻译:

马来西亚气候下管道材料和土壤热导率对地面换热器性能的研究

在自然界中,可再生能源本质上是免费的,必须加以实施。影响全球变暖的空调和制冷剂的使用是一个严重的问题。在建筑应用中,来自地热源的可再生能源,即地热交换器 (GHE),具有巨大的潜力。GHE 的主要概念是利用地面作为无限储热库,用于冷却和加热流体介质。在 GHE 系统中,空气被用作工作的流体介质。由于空气和地下温度之间的温差,空气在夏天变冷,在冬天变热。在目前的工作中,已经进行了一项研究,以调查管道材料和土壤的导热性对 GHE 性能的影响。该研究承认管道材料对 GHE 的性能没有显着影响。因此,可以在 GHE 实施中使用成本较低的管道材料的较低导热率。该研究还表明,具有良好地热交换性能的土壤导热系数范围在 1.5 至 5 W/mK 之间。此外,管道长度从 25 米减少到 10 米。

更新日期:2021-02-20
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