scholarly journals The Solar-Assisted Vertical Ground Source Heat Pump System in Cold Climates—A Case Study

Proceedings ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 24
Author(s):  
Piotr Rynkowski
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Solar Collector ◽  
Heat Extraction ◽  
Ground Heat Exchanger ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Vertical Ground

In this paper, experimental studies were performed for a solar ground source heat pump system (SGSHPS) with a vertical ground heat exchanger (VGHE). The experiment was operated during the summer in 2018. The heat from the solar collector was monitored by measuring the inlet and outlet temperatures and flow rate of the heat transfer fluids. An energy equilibrium balance carried out indicates heat extraction from the solar collector to the ground heat exchanger. It has been established that clear impact is achieved within a radius of 5 m. The average temperature of the actively regenerated borehole was higher than that of the undisturbed profile, which has a direct impact on the significant benefits of the coefficient of performance (COP) of the ground source heat pump system (GSHPS) and effectively helps soil regeneration. The average efficiency ratio of the heat transferred from solar radiation to soil in the SGSHPS was 42.3%.

Optimization of ground heat exchanger of the ground source heat pump system based on exergetic analysis using Taguchi technique

2021 ◽  
pp. 095440622199118
Author(s):  
Saif Nawaz Ahmad ◽  
Om Prakash
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Inlet Temperature ◽  
Outlet Temperature ◽  
Ground Heat Exchanger ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Exergetic Analysis

The present research work focuses on the optimization of the ground heat exchanger of the Ground source heat pump system for heating application based on exergetic analysis using the Taguchi method. For this work, we select four influencing factors such as the mass flow rate of water (A), the specific heat of water (B), inlet temperature (C) of water to and outlet temperature of water (D) from the ground heat exchanger at three levels. An L9 orthogonal array was selected for experimental trials and in each trial, we calculate the exergy destruction for the ground heat exchanger, thereafter using statistical software Minitab, we get signal to noise ratios based on smaller is better criterion. After analyzing the response table of Taguchi results, we get the optimum level of all the factors. The ANOVA technique was also applied for getting the most significant factors which affect the output results by calculating the percentage contribution of each factor. According to our results, the best combination of all the four factors for exergetic destruction of the ground heat exchanger was A3B1C1D3 and the most influencing factor was inlet water temperature with a contribution factor of 56.03%.

Evaluation of stainless steel pipe performance as a ground heat exchanger in ground-source heat-pump system

Energy ◽  
2016 ◽  
Vol 113 ◽  
pp. 328-337 ◽  
Author(s):  
Seok Yoon ◽  
Seung-Rae Lee ◽  
Min-Jun Kim ◽  
Woo-Jin Kim ◽  
Geon-Young Kim ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Heat Exchanger ◽  
Heat Pump ◽  
Steel Pipe ◽  
Ground Heat Exchanger ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Stainless Steel Pipe

scholarly journals Analysis of Heat Exchange Rate for Low-Depth Modular Ground Heat Exchanger through Real-Scale Experiment

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1893
Author(s):  
Kwonye Kim ◽  
Jaemin Kim ◽  
Yujin Nam ◽  
Euyjoon Lee ◽  
Eunchul Kang ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pump ◽  
Heat Extraction ◽  
Ground Heat Exchanger ◽  
Pump System ◽  
Heat Pump System ◽  
Scale Experiment ◽  
Real Scale

A ground source heat pump system is a high-performance technology used for maintaining a stable underground temperature all year-round. However, the high costs for installation, such as for boring and drilling, is a drawback that prevents the system to be rapidly introduced into the market. This study proposes a modular ground heat exchanger (GHX) that can compensate for the disadvantages (such as high-boring/drilling costs) of the conventional vertical GHX. Through a real-scale experiment, a modular GHX was manufactured and buried at a depth of 4 m below ground level; the heat exchange rate and the change in underground temperatures during the GHX operation were tracked and calculated. The average heat exchanges rate was 78.98 W/m and 88.83 W/m during heating and cooling periods, respectively; the underground temperature decreased by 1.2 °C during heat extraction and increased by 4.4 °C during heat emission, with the heat pump (HP) working. The study showed that the modular GHX is a cost-effective alternative to the vertical GHX; further research is needed for application to actual small buildings.

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