Experimental study on the performance of a gas engine heat pump for heating and domestic hot water

Gas engine heat pump system: Experimental facility and thermal evaluation for 5 different units

“…Furthermore, flow temperatures in heating mode (Table 8) are 35°C and 45°C, which indicate a low flow temperature. However, these machines may reach temperatures of 55°C -60°C in the condenser flow with a poor performance [35]. On the other hand, in cold mode (table 9) operation is outlined under usual flow conditions at 7°C and a return at 12°C, with a high flow temperature of 18°C.…”

“…The results were based on experimental data and they were obtained using a detailed experimental facility. Furthermore, there are studies such as [34,35], where, based on experimental data, operating laws for a unit were obtained enabling evaluation in critical summer conditions [34] or combined with known demand [35]. Both of them [34,35] are useful to understand this technology and define the best experiments to analyse these units.…”

“…Furthermore, there are studies such as [34,35], where, based on experimental data, operating laws for a unit were obtained enabling evaluation in critical summer conditions [34] or combined with known demand [35]. Both of them [34,35] are useful to understand this technology and define the best experiments to analyse these units. Moreover, Fengguo et al [12] experimentally demonstrated that it is possible to define optimal operating instructions for GEHP systems and, the importance of taking them into account in the design of this type of facilities.…”

“…Huanwei et al [30] integrated evaporative cooling with GEHP system and studied energy performance in different operational conditions. Or, Liu et al [35] who investigated the possibilities of these systems for the production of domestic heat water. Even, Mingtao et al [38] defined an experimental facility where they tested different control strategies.…”

A GIS-Based Planning Approach for Urban Power and Natural Gas Distribution Grids with Different Heat Pump Scenarios

“…The compressor is driven by a gas engine and the heat from the engine cooling cycle and exhaust gas is utilized by additional heat exchangers. Thus, the overall efficiency was estimated according to Equation (6) with relative exhaust heat loss q ex,loss = 0.25 [21], heat pump system efficiency η HP = 0.36 and gas engine efficiency η engine = 0.307 (assumption: full load, 1400 rpm) [65]. Currently, commercial gas engine heat pumps are only available for rated power of 25 kW upwards but market availability of small-scale geHPs could be reached within a few years [66].…”