Hello Chris,

In regards to your VRF posting. We are currently finishing some work for the U.S. Army to verify the performance of a side-by-side test of a VRF system, which we have accomplished with a calibrated simulation. The results show a 35 to 50% savings when compared to the baseline air-cooled HVAC in the 1/2 of the building that was not retrofitted. The biggest factor in the savings is the individual zoning and the combination of zoning with motion sensors at each thermostat, which creates a building that has partial conditioning and different thermostat schedules for each zone, not simple to simulate. These results are based on measured data taken over the last 18 months.

Jeff

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Jeff S. Haberl, Ph.D.,P.E.inactive,FASHRAE,FIBPSA,......jhaberl at tamu.edu
Professor........................................................................Office Ph: 979-845-6507
Department of Architecture............................................Lab Ph:979-845-6065
Energy Systems Laboratory...........................................FAX: 979-862-2457
Texas A&M University...................................................77843-3581
College Station, Texas, USA, 77843.............................http://esl.tamu.edu
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