VRF systems are touted for their superior part-load performance compared to conventional HVAC systems. This study compares both the full and part-load performance of a VRF system with a conventional RTU VAV (rooftop variable air volume) system in a multi-zone office building with emulated occupancy. During the study period starting July 2015 through February 2016, each system was operated alternately under each of the three load conditions for 2-3 days, and the system parameters, indoor and outdoor conditions, loads, and energy use were monitored. The performance of the two systems is compared in terms of weather-normalized HVAC energy consumption.
See more of: Building Cooling and Heating System Design