Numerical study of horizontal ground heat exchanger for high energy demand applications

Dasare, Ranjeet R.; Saha, Sandip K.

doi:10.1016/j.applthermaleng.2015.04.014

Cited by 62 publications

(21 citation statements)

References 11 publications

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“…Following the approach of [43] In heating mode, the thermal load of BHE (Q BHE ) is lower than that of the building and it can be expressed as: COP QQ Normally, the COP of a specific heat pump is not constant and is often represented as function of the heat pump inlet fluid temperature. In this work the relationship between the outlet fluid temperature of BHE and COP is assumed to be as defined by [45]:…”

Section: Boundary Conditionsmentioning

confidence: 99%

Numerical simulation of ground source heat pump systems considering unsaturated soil properties and groundwater flow

Cleall

Mao

et al. 2018

Applied Thermal Engineering

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Section: Boundary Conditionsmentioning

confidence: 99%

Numerical simulation of ground source heat pump systems considering unsaturated soil properties and groundwater flow

Cleall

Mao

et al. 2018

Applied Thermal Engineering

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“…Therefore, the refrigeration cycle are selected as a typical analysis. When operate for heating, the thermal load of heat pump is expressed in Eq (1) [11] .…”

Section: Methodsmentioning

confidence: 99%

Performance of heat pump unit with capillary heat exchanger*

Bai

2018

MATEC Web Conf.

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Abstract:The heat pump system utilizes shallow geothermal energy in the coastal areas, which not only uses clean energy but also contributes to energy conservation and environmental protection. This paper studies the performance of a heat pump system applied a capillary heat exchanger as an energy collection device. The numerical performance of capillary heat pump showed a good agreement with the experimental data in the winter heating mode and the summer cooling mode. It was concluded that the COP of the heat pump unit using the capillary heat exchanger was 5.32 in winter and 4.32 in summer.

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“…Although the required site area for this system is small, the system has a high initial cost for drilling and installation of the GHE. Meanwhile, the horizontal (shallow) closed-loop system is relatively inexpensive, as it requires no vertical borehole and just shallow trenches that can be dug through manual (human) labor or mechanical means, such as the use of a mini-excavator [16][17][18]. However, this system requires a larger footprint for installation.…”

Section: Introductionmentioning

confidence: 99%

“…The horizontal closed system is increasingly being studied. Several studies have compared shallow linear, helical, and slinky GHEs in numerical simulation, and have found that the helical configuration has the best performance [16,17,19]. They have also found that the thermal conductivity surrounding a GHE and the flowrate of the heat transfer fluids are the most important parameters.…”

Section: Introductionmentioning

confidence: 99%

Ground-Source Heat Pumps with Horizontal Heat Exchangers for Space Cooling in the Hot Tropical Climate of Thailand

et al. 2019

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The cooling of spaces in tropical regions, such as Southeast Asia, consumes a lot of energy. Additionally, rapid population and economic growth are resulting in an increasing demand for space cooling. The ground-source heat pump has been proven a reliable, cost-effective, safe, and environmentally-friendly alternative for cooling and heating spaces in various countries. In tropical countries, the presumption that the ground-source heat pump may not provide better thermal performance than the normal air-source heat pump arises because the difference between ground and atmospheric temperatures is essentially low. This paper reports the potential use of a ground-source heat pump with horizontal heat exchangers in a tropical country—Thailand. Daily operational data of two ground-source heat pumps and an air-source heat pump during a two-month operation are analyzed and compared. Life cycle cost analysis and CO2 emission estimation are adopted to evaluate the economic value of ground-source heat pump investment and potential CO2 reduction through the use of ground-source heat pumps, in comparison with the case for air-source heat pumps. It was found that the ground-source heat pumps consume 17.1% and 18.4% less electricity than the air-source heat pump during this period. Local production of heat pumps and heat exchangers, as well as rapid regional economic growth, can be positive factors for future ground-source heat pump application, not only in Thailand but also southeast Asian countries.

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Numerical study of horizontal ground heat exchanger for high energy demand applications

Cited by 62 publications

References 11 publications

Numerical simulation of ground source heat pump systems considering unsaturated soil properties and groundwater flow

Numerical simulation of ground source heat pump systems considering unsaturated soil properties and groundwater flow

Performance of heat pump unit with capillary heat exchanger*

Ground-Source Heat Pumps with Horizontal Heat Exchangers for Space Cooling in the Hot Tropical Climate of Thailand

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