Investigations on heat flow characteristics of the aquifer for groundwater heat pump (GWHP) composed of different well types

Jiang, Yan; Wang, Xiaoyang; Li, Ming; Gao, Qing

doi:10.1080/15435075.2019.1641106

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…Two additional important sustainable applications related to groundwater flow are geothermal systems and underground thermal energy storage (UTES) systems [48][49][50][51][52][53][54][55][56][57][58][59]. These systems were first used due to the oil crisis of the 1970s to identify alternative sources of energy [60,61], and have subsequently been proven to be successful in solving various challenges.…”

Section: Introductionmentioning

confidence: 99%

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

et al. 2020

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Seepage velocity is a very important criterion in infrastructure construction. The planning of numerous large infrastructure projects requires the mapping of seepage velocity at a large scale. To date, however, no reliable approach exists to determine seepage velocity at such a scale. This paper presents a tool within ArcMap/Geographic Information System (GIS) software that can be used to map the seepage velocity at a large scale. The resultant maps include both direction and magnitude mapping of the seepage velocity. To verify the GIS tool, this study considered two types of aquifer conditions in two regions in Iraq: silty clayey (Babylon province) and sandy (Dibdibba in Karbala province). The results indicate that, for Babylon province, the groundwater flows from the northwest to southeast with a seepage velocity no more than 0.19 m/d; for the Dibdibba region, the groundwater flows from the west to the east with a seepage velocity not exceeding 0.27 m/d. The effectiveness of the presented tool in depicting the seepage velocity was thus demonstrated. The accuracy of the resultant maps depends on the resolution of the four essential maps (groundwater elevation head, effective porosity, saturated thickness, and transmissivity) and locations of wells that are used to collect the data.

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Section: Introductionmentioning

confidence: 99%

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

et al. 2020

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“…causes the occurrence of temperature imbalance [16]. When the extraction well is influenced by the temperature imbalance, a change occurs in the temperature of the pumped water -this is called thermal breakthrough [17].…”

Section: Thermal Breaktroughtmentioning

confidence: 99%

The Influence of Aquifer Parameters on the Design of Extraction and Recharge Wells for Heat Pump Systems

et al. 2020

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Groundwater can be considered a non-polluting, renewable energy source. It can be used as a fluid in industrial, commercial, and residential building heating and airconditioning systems. Usually the water table is deep enough, so atmospheric conditions have a negligible influence on water temperature. Consequently, annual temperature variation is minor, and groundwater can therefore also be considered a reliable energy source. This paper presents some aspects of the groundwater heat pump (GWHP) wells design and addresses problems that can occur during their exploitation. The heat pump system consists of two types of wells: extraction wells and recharge wells. This paper shows that the distance between the two is a crucial parameter that affects the efficiency of the whole system. An example of wells design for a production hall groundwater heat pump is given. The wells are constructed is in the northern part of Croatia. Geological and hydrogeological conditions at the site, regarding water temperature and soil hydraulic conductivity, are highly favorable. Due to insufficient distance between wells thermal breakthrough occurred, i.e. water temperature in the extraction well rose, which resulted in a lower efficiency of the GWHP system.

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“…It was found that groundwater flow influences the thermal dispersion coefficient, leading to an increase in its value even at low velocities. Another experimental study, associated with a numerical computation, was carried out by Jiang et al [25], where they investigated the effect of different well types on the thermal breakthrough in the aquifer. Their findings demonstrated that increasing the number of injection and abstraction wells or expanding the distance between them can reduce the likelihood of thermal breakthroughs.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation of Impact of Injection–Abstraction Rate and Groundwater Flow Velocity on Groundwater Heat Pump Performance

Sezer,

Sani,

Singh

et al. 2023

Energies

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Using low-temperature (shallow) groundwater as a heat source or heat sink is a common practice to supply space heating or cooling, especially in the United States, Canada, China, and several European countries. The groundwater heat pump (GWHP) system has been extensively studied in recent decades using numerical approaches, which have some limitations in understanding the soil’s thermal behavior. Therefore, a laboratory-scale experimental study involving cooling tests was carried out to investigate the impact of GWHP on system performance and sustainability with varying groundwater flow velocities and injection and abstraction rates. The results demonstrated that groundwater flow velocity, as well as injection and abstraction rates, significantly impact thermal plume development. Higher injection and abstraction rates create a larger thermal plume, thereby decreasing abstraction temperature. However, groundwater flow prevents heat development around the well by dispersing the heat in the groundwater flow direction. Furthermore, the results indicate that the energy gain only increased by 81% and 107%, with a respective increase of 100% and 200% in injection and abstraction rates.

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Investigations on heat flow characteristics of the aquifer for groundwater heat pump (GWHP) composed of different well types

Cited by 8 publications

References 29 publications

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

The Influence of Aquifer Parameters on the Design of Extraction and Recharge Wells for Heat Pump Systems

Laboratory Investigation of Impact of Injection–Abstraction Rate and Groundwater Flow Velocity on Groundwater Heat Pump Performance

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