Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling

Abstract

In this paper, the performance of a gas engine-driven heat pump (GEHP) was experimentally studied for space heating and cooling. An experimental test facility was developed for this purpose. The effect of key parameters on system performance was investigated under both cooling and heating modes. The results showed that as the engine speed increased from 1400 to 2000 rpm, the cooling and heating capacities increased by 23% and 28.5%, respectively while the GEHP system Primary Energy Ratio (PER) decreased by 13.5% and 11.7% in the cooling and heating modes, respectively. The system PER in the cooling mode was found lower than that in the heating mode. This indicated that heat recovery from the engine cylinder and exhaust gas was very important for improving the GEHP system performance. In the heating mode, the ambient temperature and condenser water flow rate had a large effect on the system heating capacity and PER, and insignificant effect on the gas energy input. In the cooling mode, the chilled water inlet temperature showed a large effect on both cooling capacity and gas energy input while the chilled water flow rate had a large effect on cooling capacity and insignificant effect on the gas energy input.

Effect of Wire Pitch on Capacity of Single Staggered Wire and Tube Heat Exchanger Using Computational Fluid Dynamic Simulation

“…This is applied by Topcuoglu [2] that used coiled tube for increasing heat transfer. Zhang et al [3] studied condenser in gas engine-driven heat pump for heating and cooling application. Many development designs are investigated to improve performance wire and tube heat exchanger with inline arrangement wire.…”

Heat Transfer Performance Analysis and Optimization of Exhaust Gas Recirculation Cooler with Different Structural Characteristics

“…This trend is caused by the indirect area generated by the inner fin model. According to Equations (2), (3) and (4) [20,21], the heat exchanged between the gas and liquid is related to the heat transfer area, and the outlet temperature will be affected by the heat loss of gas side and heat gained by liquid side. Larger transfer area exchanged more heat and resulted low gas side outlet temperature as compared in Tables 3 and 4.…”

Augmented Reality System and Maintenance of Oil Pumps

“…If the current situation has not the described solution, then there is a possibility to connect specialist to the process remotely, who is able to examine the collected data quickly, provide the equipment visual inspection by means of camera in the headset and give detailed recommendations for troubleshooting. The specialist can give his recommendations on the screen and a person at site will see on the display equipped with AR [24].…”