Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System

Aquifer thermal energy storage (ATES) system is widely used mainly in Europe and USA. In this paper, we examined the efficient operation method of ATES by comparing it with the water thermal energy storage (WTES) system of an existent thermal energy storage (TES) system using simulation. This study...

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Autores principales:	Jewon Oh, Daisuke Sumiyoshi, Masatoshi Nishioka, Hyunbae Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	aquifer thermal energy storage system water thermal energy storage system efficient operation method water-cooled heat pump simulation analysis pre-cooling/pre-heating coil Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/06c4e38f59594f959a85f74e9e76f7de
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spelling	oai:doaj.org-article:06c4e38f59594f959a85f74e9e76f7de2021-11-11T15:20:48ZExamination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System10.3390/app1121103212076-3417https://doaj.org/article/06c4e38f59594f959a85f74e9e76f7de2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10321https://doaj.org/toc/2076-3417Aquifer thermal energy storage (ATES) system is widely used mainly in Europe and USA. In this paper, we examined the efficient operation method of ATES by comparing it with the water thermal energy storage (WTES) system of an existent thermal energy storage (TES) system using simulation. This study uses three aquifers: pumping wells, thermal storage wells, and reducing wells. The initial temperature is 19.1 °C groundwater from the surrounding area. ATES systems use the same operating methods as WTES systems to reduce heat storage efficiency and increase energy consumption. The operation that combines the ATES system with the pre-cooling/pre-heating coil can be used for air conditioning operation even if the heat storage diffuses or the pumping temperature changes. The aquifer heat storage system was used for the pre-cooling/pre-heating coil, and the cooling power consumption was reduced by 20%. The heating operation could not maintain heat for a long time due to the influence of groundwater flowing in from the surroundings. Therefore, it is recommended to use the stored heat as soon as possible. When energy saving is important by introducing a pre-cooling/pre-heating coil, the operation is performed by storing heat at a low temperature close to geothermal heat and also using groundwater heat. In addition, if the reduction of peak power in the daytime is important, it is appropriate to operate so that the heat stored in the pre-cooling/pre-heating coil is used up as much as possible. As a result, it was found that it is effective to operate the ATES system in combination with a pre-cooling/pre-heating coil. In cooling operation, ATES-C1-7 was the lowest at coefficient of performance (COP) 2.4 and ATES-C2-14 was the highest at COP 3.7. In heating operation, ATES-H1-45 was the lowest at COP1.2, and in other cases, it was about the same at COP2.4-2.8. In terms of energy efficiency, the heating operation ATES-H1-45 had a low energy efficiency of 4.1 for energy efficiency ratio (EER) and 3.9 for seasonal energy efficiency ratio (SEER). In other cases, the energy efficiency was 8.2–12.4 for EER and 8.7–15.3 for SEER.Jewon OhDaisuke SumiyoshiMasatoshi NishiokaHyunbae KimMDPI AGarticleaquifer thermal energy storage systemwater thermal energy storage systemefficient operation methodwater-cooled heat pumpsimulation analysispre-cooling/pre-heating coilTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10321, p 10321 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aquifer thermal energy storage system water thermal energy storage system efficient operation method water-cooled heat pump simulation analysis pre-cooling/pre-heating coil Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	aquifer thermal energy storage system water thermal energy storage system efficient operation method water-cooled heat pump simulation analysis pre-cooling/pre-heating coil Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Jewon Oh Daisuke Sumiyoshi Masatoshi Nishioka Hyunbae Kim Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
description	Aquifer thermal energy storage (ATES) system is widely used mainly in Europe and USA. In this paper, we examined the efficient operation method of ATES by comparing it with the water thermal energy storage (WTES) system of an existent thermal energy storage (TES) system using simulation. This study uses three aquifers: pumping wells, thermal storage wells, and reducing wells. The initial temperature is 19.1 °C groundwater from the surrounding area. ATES systems use the same operating methods as WTES systems to reduce heat storage efficiency and increase energy consumption. The operation that combines the ATES system with the pre-cooling/pre-heating coil can be used for air conditioning operation even if the heat storage diffuses or the pumping temperature changes. The aquifer heat storage system was used for the pre-cooling/pre-heating coil, and the cooling power consumption was reduced by 20%. The heating operation could not maintain heat for a long time due to the influence of groundwater flowing in from the surroundings. Therefore, it is recommended to use the stored heat as soon as possible. When energy saving is important by introducing a pre-cooling/pre-heating coil, the operation is performed by storing heat at a low temperature close to geothermal heat and also using groundwater heat. In addition, if the reduction of peak power in the daytime is important, it is appropriate to operate so that the heat stored in the pre-cooling/pre-heating coil is used up as much as possible. As a result, it was found that it is effective to operate the ATES system in combination with a pre-cooling/pre-heating coil. In cooling operation, ATES-C1-7 was the lowest at coefficient of performance (COP) 2.4 and ATES-C2-14 was the highest at COP 3.7. In heating operation, ATES-H1-45 was the lowest at COP1.2, and in other cases, it was about the same at COP2.4-2.8. In terms of energy efficiency, the heating operation ATES-H1-45 had a low energy efficiency of 4.1 for energy efficiency ratio (EER) and 3.9 for seasonal energy efficiency ratio (SEER). In other cases, the energy efficiency was 8.2–12.4 for EER and 8.7–15.3 for SEER.
format	article
author	Jewon Oh Daisuke Sumiyoshi Masatoshi Nishioka Hyunbae Kim
author_facet	Jewon Oh Daisuke Sumiyoshi Masatoshi Nishioka Hyunbae Kim
author_sort	Jewon Oh
title	Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
title_short	Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
title_full	Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
title_fullStr	Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
title_full_unstemmed	Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System
title_sort	examination of efficient operation method of ates system by comparison operation with wtes system of existent heat storage system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/06c4e38f59594f959a85f74e9e76f7de
work_keys_str_mv	AT jewonoh examinationofefficientoperationmethodofatessystembycomparisonoperationwithwtessystemofexistentheatstoragesystem AT daisukesumiyoshi examinationofefficientoperationmethodofatessystembycomparisonoperationwithwtessystemofexistentheatstoragesystem AT masatoshinishioka examinationofefficientoperationmethodofatessystembycomparisonoperationwithwtessystemofexistentheatstoragesystem AT hyunbaekim examinationofefficientoperationmethodofatessystembycomparisonoperationwithwtessystemofexistentheatstoragesystem
_version_	1718435348528234496

Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System

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