Abstract
The present work aims to explore a new energy supply way for users with chilled and hot water demand in summer. To achieve this goal, a water source gas engine-driven heat pump (WSGHP) system with R134a was developed. The WSGHP system used evaporator to product chilled water, at the same time, made use of condensing heat and engine waste heat to product domestic hot water. The impact of engine speed, evaporator/condenser water inlet temperature on the gas consumption, cooling capacity, heat recovery, and system energy efficiency had been researched in detail. Testing results indicated that the WSGHP system was able to perform stably under various conditions. The primary energy ratio without heat recovery (PER1) of system is from 0.61 to 0.85. However, when the condensing heat and engine waste heat are recovery, its primary energy ratio (PER2) is 2.09–2.34. The cooling capacity, condensing heat and engine waste heat account for 31.5%, 40.0%, and 28.5% of the total capacity of the system, respectively. Therefore, the new energy supply system has great significance to the development of energy-saving and environmental protection.
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