Performance evaluation of a ground-source heat pump system utilizing a flowing well and estimation of suitable areas for its installation in Aizu Basin, Japan

Shrestha, Gaurav; Uchida, Yoshiyuki; Kuronuma, Satoru; Yamaya, Mutsumi; Katsuragi, Masahiko; Kaneko, Shohei; Shibasaki, Naoaki; Yoshioka, Mayumi

doi:10.1007/s10040-017-1536-x

Cited by 8 publications

(26 citation statements)

References 16 publications

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“…Analysis of groundwater flow and heat transport must to be done for assessing the installation potential of a GSHP system. For this purpose, an analysis model ( Figure 2) developed by Shrestha et al [18] was used in this paper. The finite element program FEFLOW [20] was used to develop this analysis model.…”

Section: Regional Scale 3d Analysis Modelmentioning

confidence: 99%

“…The analysis model had been validated by comparing the calculated results of groundwater levels and vertical distribution of underground temperature with their corresponding measured field data of the existing wells in the basin [18].…”

Section: Boundary Conditions and Validation Of Analysis Modelmentioning

confidence: 99%

“…Figures 3 and 4 show the verification of calculated hydraulic heads and underground temperature with their measured data. More details about the analysis model and its validation can be referred to in the previous work by Shrestha et al [18]. The analysis model had been validated by comparing the calculated results of groundwater levels and vertical distribution of underground temperature with their corresponding measured field data of the existing wells in the basin [18].…”

Section: Figures 3 and 4 Show The Verification Of Calculated Hydraulimentioning

confidence: 99%

“…The northern and southern areas were found to be more appropriate for the conventional system with higher heat exchange rates. Then, at the less suitable central area with lower heat exchange rates, a different type of GSHP system using an artesian (flowing) well developed by Shrestha et al [18] was proposed. It is because at these locations, groundwater upflow is occurring, and utilizing its heat can enhance the system's heat exchange performance.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Installation Potential of a Ground Source Heat Pump System Based on the Groundwater Condition in the Aizu Basin, Japan

Shrestha¹,

Uchida²,

Ishihara³

et al. 2018

Energies

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Assessment of suitable locations for a ground source heat pump (GSHP) system based on the groundwater condition of study area is important for its sustainable development. Installation potential of a GSHP system was evaluated for the Aizu Basin, Japan. Firstly, suitability assessment was done for a conventional closed-loop system by preparing a distribution map of heat exchange rates for space heating. Heat exchange rates were higher at the northern and southern areas and lower at the central area, indicating that the northern and southern areas are appropriate for the conventional system. A different type of GSHP system using an artesian well was proposed at the central area because groundwater is flowing in an upward direction and using its heat energy can increase heat exchange rates. Demonstration of this system using an artesian well for space heating resulted in higher heat exchange rates compared to the conventional system. A GSHP system using an artesian well is suitable at the central area, and the conventional one is suitable at the northern and southern areas. Assessment of the installation potential of different types of GSHP system in the same Aizu Basin based on its groundwater condition is unique to this study. It can assist in selecting suitable locations for GSHP system installation and to promote its growth in Japan.

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Section: Regional Scale 3d Analysis Modelmentioning

confidence: 99%

Section: Boundary Conditions and Validation Of Analysis Modelmentioning

confidence: 99%

Section: Figures 3 and 4 Show The Verification Of Calculated Hydraulimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of the Installation Potential of a Ground Source Heat Pump System Based on the Groundwater Condition in the Aizu Basin, Japan

Shrestha¹,

Uchida²,

Ishihara³

et al. 2018

Energies

Self Cite

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“…In addition, some new ideas of heat exchange systems, so-called "semi-open "systems, which have benefits of both open-and closed-loop systems, are introduced by several authors [16,17].…”

Section: Application Of Open-loop Systemsmentioning

confidence: 99%

Space Cooling by Ground Source Heat Pump in Tropical Asia

Yasukawa¹,

Uchida²

2019

Renewable Geothermal Energy Explorations

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In Southeastern Asia, where energy demand is expanding to meet the increasing population and industry needs, energy saving by use of ground source heat pump (GSHP) could be one of the solutions. There are several concerns on GSHP installation in this region. The biggest concern is the subsurface temperature in tropical Asia. Although space cooling is needed in tropical regions, underground is slightly warmer than average atmospheric temperature and may not be used as "cold" source. However, groundwater temperature survey results in Thailand and Vietnam show the applicability of GSHPs in this region. Also, experimental GSHP systems for cooling have been installed in Thailand, Indonesia, and Vietnam, and studies have been done to improve cost performance of these systems. As results, the following things are found: 30% of energy saving compared to normal air-conditioner has been confirmed at a test site in Bangkok. Systems with local manufacturing would be a key for cost reduction. Cost performance may be optimized by selection of horizontal and/or vertical heat exchangers depending on the local subsurface condition. Drilling technology for no-cementing and no-casing completion is a key for higher heat exchange rate in vertical heat exchangers.

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Numerical study on the heat performance of enhanced coaxial borehole heat exchanger and double U borehole heat exchanger

Chen

Zheng

et al. 2022

Applied Thermal Engineering

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Performance evaluation of a ground-source heat pump system utilizing a flowing well and estimation of suitable areas for its installation in Aizu Basin, Japan

Cited by 8 publications

References 16 publications

Assessment of the Installation Potential of a Ground Source Heat Pump System Based on the Groundwater Condition in the Aizu Basin, Japan

Assessment of the Installation Potential of a Ground Source Heat Pump System Based on the Groundwater Condition in the Aizu Basin, Japan

Space Cooling by Ground Source Heat Pump in Tropical Asia

Numerical study on the heat performance of enhanced coaxial borehole heat exchanger and double U borehole heat exchanger

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