The potential of utilizing vertical borehole heat exchangers in residential buildings for the various climate zones of Saudi Arabia

IF 3.5 2区工程技术 Q3 ENERGY & FUELS

Geothermics Pub Date : 2024-06-22 DOI:10.1016/j.geothermics.2024.103087

Ahmad Aljabr , Sulaiman Almoatham

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引用次数: 0

Abstract

Most of the literature concerning geothermal energy in Saudi Arabia has focused on power generation applications. This paper investigates the potential of utilizing ground-source heat pump (GSHP) with vertical borehole heat exchangers in residential buildings in the various climate zones and subsurface geologies of Saudi Arabia. Thermal loads of a typical residential building in Saudi Arabia were generated using eQuest software, then used in a model of GSHP system in TRNSYS. The performance and economics of the GSHP system was evaluated and compared with a typical air-source heat pump (ASHP) system for each location. The total borehole lengths in all zones were determined using the cooling load (the dominant load). The potential for employing GSHP systems was found to be not uniform across Saudi Arabia. The required length of the GHE ranged between 12 and 148 m/kW of cooling. The annual energy saving when employing GSHP instead of ASHP systems varied between 3 % to 19 %, and the building's electricity peak demand could be reduced between 5 % to 43 %. Although GSHPs reduced electrical and maintenance costs, their high drilling cost makes them economically unattractive under the present electric utility charge in Saudi Arabia.

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在沙特阿拉伯不同气候区的住宅楼中利用垂直井孔热交换器的潜力

有关沙特阿拉伯地热能源的大部分文献都侧重于发电应用。本文研究了在沙特阿拉伯不同气候带和地下地质条件下的住宅建筑中利用带有垂直钻孔热交换器的地源热泵（GSHP）的潜力。使用 eQuest 软件生成了沙特阿拉伯典型住宅楼的热负荷，然后将其用于 TRNSYS 中的 GSHP 系统模型。对 GSHP 系统的性能和经济性进行了评估，并与每个地点的典型空气源热泵 (ASHP) 系统进行了比较。使用冷却负荷（主要负荷）确定了所有区域的钻孔总长度。研究发现，沙特阿拉伯各地采用 GSHP 系统的潜力并不一致。所需的 GHE 长度在 12 至 148 米/千瓦制冷量之间。采用 GSHP 而不是 ASHP 系统每年可节约的能源在 3 % 到 19 % 之间，建筑物的用电高峰需求可减少 5 % 到 43 %。虽然 GSHPs 降低了电力成本和维护成本，但其高昂的钻井成本使其在沙特阿拉伯目前的电力收费标准下缺乏经济吸引力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geothermics 工程技术-地球科学综合

CiteScore

7.70

自引率

15.40%

发文量

237

审稿时长

4.5 months

期刊介绍： Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.