A comparison of ground and air source heat pump performance for domestic applications: A case study in Perth, Australia

Aprianti, Tine; Tan, Evan; Diu, Chan; Sprivulis, Ben; Ryan, Greg; Srinivasan, K.; Chua, Hui Tong

doi:10.1002/er.7133

Cited by 10 publications

(6 citation statements)

References 27 publications

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“…also studied such an idea using groundwater as a heat exchanger [6,7]. Aprianti et al perform a comparison of ground and air source heat pumps and found the cost-of-performance of groundwater is better than air [8].…”

Section: Introductionmentioning

confidence: 99%

Challenge of Using Groundwater for Buildings Air Conditioning in Subtropical Areas

Kuo

Liao

2021

Sustainability

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Using circulating groundwater to cool air-conditioning is not new in high latitude regions but difficult in subtropical areas. Different from only using fans to remove the heat from indoor air for drier air in the high latitude region, the latent heat inside the humid air in subtropical areas makes the operation more difficult. Latent heat inside the humid air must remove away by air-conditioning including compressor and fan for cooling indoor air, which means more electrical power is required for the operation. To save total electrical power for the air-conditioning system is the main goal of this study. To use the advantage of groundwater with lower temperature to lower down the work of compressor, this research compared two ways, close/open types of water/groundwater circulation, both using groundwater to remove the heat generated by a 15RT (45 kW) air-conditioning. Full-scale tests and simulations were performed in this study to evaluate the efficiency of transferring the heat produced by air-conditioning systems to stably flowing groundwater in a grave stratum under Taipei Basin. With a closed circulating cooling water system, this study found that a 15RT air conditioner could only operate continuously for 4 h before it had to be shut down due to overheating. Additionally, groundwater must carry the heat away within the following 20 h. In changing the closed circulating water system to an open one, a system that uses a circulatory method to extract groundwater upwards and conduct heat exchange with an air conditioning system can enable the continuous operation of such a system with the same heat production condition. Numerical simulations for the heat dissipation behavior of two circulatory systems were performed herein. The results verified the aforementioned phenomena observed from both tests. The result showed both systems can provide air-conditioning working well. The total electrical power for a 15RT air-conditioning in sub-tropical areas can be reduced by 22% using circulating groundwater. Considering the system optimization, the total power consumption can be reduced by about 28%.

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Section: Introductionmentioning

confidence: 99%

Challenge of Using Groundwater for Buildings Air Conditioning in Subtropical Areas

Kuo

Liao

2021

Sustainability

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“…Al-Douri et al [34] explored the potential of using geothermal energy and suggested applications in this regard, focusing on the need for a sustainable, green, and clean environment. Aprianti et al [35] compared the use of a ground source heat pump (GSHP) and an air source heat pump (ASHP) for the residential sector in Perth, Western Australia. The results showed that for cooling, the GSHP had an average COP of 3.1, while the COP of the ASHP ranged between 1.3 and 2.8, which was affected by ambient temperatures.…”

Section: Literature Reviewmentioning

confidence: 99%

Utilizing a Domestic Water Tank to Make the Air Conditioning System in Residential Buildings More Sustainable in Hot Regions

et al. 2022

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Air conditioning (AC) is considered an important requirement for hot environments, but it is facing one of the most demanding obstacles as concerns the use of electrical energy resources. In 2019, electricity consumption in the residential sector in Gulf Cooperation Council states reached approximately 43% of the total national consumption, and about two-thirds of the electrical energy consumed in residential buildings (RBs) was used for AC. Therefore, as these indicators show, there is a need to focus on studying AC. One of the most important reasons for the high consumption of electrical energy in RBs is the big difference between indoor and outdoor temperatures. In this paper, a heat exchanger was designed and tested experimentally to reduce this temperature difference by using a domestic ground water tank (GWT) as a sink/source (water-cooled condensers instead of air-cooling). The results have shown that the water tank made the surrounding temperature around the external coil of the AC more suitable for cooling/heating. The proposed system resulted in a reduction in energy consumption by 28% of the electrical energy needed in the conventional system and an increase in COP by 39%. This means that this system is more efficient and therefore more sustainable.

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“…4 Water Furnace NVK-012, 15 kW GSHP unit, a Caprari CapSub-3 System 2 model 30-65 submersible pump with a nominal power rating of 900 W, and a SCW structure as shown in Figure 2. For this system, a 200-mm diameter borehole was drilled to a depth of 57 meters, with the water table at 34.4 meters [33]. At a depth of 35 meters below ground level, the returned groundwater is reinjected into the aquifer.…”

Section: Gshp System Descriptionmentioning

confidence: 99%

“…In India, this is also the case in many metropolitan areas. Bangalore, for example, has 400,000 authorized borewells [33]. Heating and cooling are a need in all of those metropolitan communities.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Ground Source Heat Pump (GSHP) against Air Source Heat Pump (ASHP) for Domestic Applications: A case study in Perth, Australia

et al. 2021

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The goal of this research is to evaluate the efficacy and practicality of installing a ground source heat pump (GSHP) with an air source heat pump (ASHP) in a residential setting. The results of this comparison were obtained by monitoring each of the systems in two almost identical residences in Perth, Western Australia. There is an open-loop groundwater system in the previous home. Each residence has one family whose air conditioning system has its own set of operational needs. The cooling capacity supplied and coefficient of performance (COP) as a function of seasonal changes in ambient temperatures were determined using data gathered from both residences over a two-year period. For both heating and cooling, the GSHP system COP was found to be greater than that of the ASHP system. Furthermore, these two performance measures were independent of ambient circumstances in the former, but they exhibit a noticeable ambient dependent trend in the latter. The GSHP had an average COP of 4.0 for heating, regardless of external conditions, while the ASHP COP ranged from 2.0 to 3.0. Conversely, the GSHP had an average COP of 3.2 for cooling, whereas the ASHP COP ranged from 1.4 to 2.9. It is found that GSHPs result in significant operational cost reductions and a significant decrease in greenhouse gas emissions when a borewell is part of a home.

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A comparison of ground and air source heat pump performance for domestic applications: A case study in Perth, Australia

Cited by 10 publications

References 27 publications

Challenge of Using Groundwater for Buildings Air Conditioning in Subtropical Areas

Challenge of Using Groundwater for Buildings Air Conditioning in Subtropical Areas

Utilizing a Domestic Water Tank to Make the Air Conditioning System in Residential Buildings More Sustainable in Hot Regions

Performance Comparison of Ground Source Heat Pump (GSHP) against Air Source Heat Pump (ASHP) for Domestic Applications: A case study in Perth, Australia

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