Effects of ground heat exchangers with different connection configurations on the heating performance of GSHP systems

A Study on the Effect of Performance Factor on GSHP System through Real-Scale Experiments in Korea

“…The Equation (1) is based on heat transfer equation [10,19]. This equation can be used to calculate the heat transfer rate between ground heat exchanger and heat pump.…”

“…The heating capacity represents the amount of heat transfer among the heat pump, heat storage tank, and fan coil unit. It can be represented by the sum of heat transfer rate and heat pump power [10]. The heat pump COP can be expressed as the ratio of the heating capacity to the required power [10,19].…”

“…It, however, does not provide quantitative values for newly developed systems, such as the shape of the ground heat exchanger and the introduction of the heat storage tank. To address this problem, various studies [5][6][7][8][9][10][11][12][13][14][15][16][17][18] have been conducted using experimental and numerical methods.…”

“…As a result, The ground effective thermal conductivity of the inner rib type has a higher 13.2% than that of the high-density polyethylene (HDPE) type. Qi et al [10] performed COP analysis according to the connection type of ground heat exchanger through numerical simulation. According to the result, the COP of the parallel type of ground heat exchanger is 4.8% higher than that of the series type.…”

“…Performance analysis studies are actively conducted according to performance factors [5][6][7][8][9][10][11][12][13][14][15][16]. However, most of the studies [5,6,8,10,11,14] were conducted through numerical analysis. Most experimental studies have been conducted to verify the suitability of sites by real-scale experiments [17,18].…”