Experimental evaluation of the ventilation effects on the performance of a VRV system in cooling mode - Part I: Experimental evaluation

The effect of ventilation on indoor temperature control, thermal comfort, outdoor unit energy consumption, and efficiency of the multi-split variable refrigerant volume (VRV) system is investigated in afield test under varying outdoor conditions. It is observed through the experiments that ventilation does not affect the indoor temperature control of the multi-split VRV system; instead it increases the indoor humidity ratio, resulting in a less comfortable indoor environment. Even though ventilation increases the outdoor unit energy consumption due to the ventilation load, it does not have a considerable effect on the efficiency of the multi-split VRV system.