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Can EnergyPlus accurately model VRF systems?

We did a study and compared different modeling tools.

We found EnergyPlus has the most lab and field test data demonstrating the accuracy of the module. It also is able to model Heat Recovery VRF systems and it is able to model multiple HVAC systems per thermal zone. Therefore, EnergyPlus is able to model all of the common VRF installations in commercial buildings.

We want to hear your comments.

References EPRI (forthcoming), PG&E Emerging Technology study of a variable refrigerant flow system installed at the PG&E service office in Auburn, CA. Hwang, Yunho, et al. "Field Performance Measurements of VRF System with Subcooling Heat Exchanger." Purdue E-pubs. University of Purdue, 2012. Web. Aug. 2014. http://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=2262&context=iracc Raustad, Richard. Domitrovic, Ron, et al. “Technical Subtopic 2.1: Modeling Variable Refrigerant Flow Heat Pump and Heat Recovery Equipment in EnergyPlus” Sept. 2013. Web. Aug. 2014 http://fsec.ucf.edu/en/publications/pdf/FSEC-cr-1968-13.pdf

Can EnergyPlus accurately model VRF systems?

We did a study and compared different modeling tools.

We found EnergyPlus has the most lab and field test data demonstrating the accuracy of the module. It also is able to model Heat Recovery VRF systems and it is able to model multiple HVAC systems per thermal zone. Therefore, EnergyPlus is able to model all of the common VRF installations in commercial buildings.

We want to hear your comments.

References EPRI (forthcoming), PG&E Emerging Technology study of a variable refrigerant flow system installed at the PG&E service office in Auburn, CA. Hwang, Yunho, et al. "Field Performance Measurements of VRF System with Subcooling Heat Exchanger." Purdue E-pubs. University of Purdue, 2012. Web. Aug. 2014. http://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=2262&context=iracc Raustad, Richard. Domitrovic, Ron, et al. “Technical Subtopic 2.1: Modeling Variable Refrigerant Flow Heat Pump and Heat Recovery Equipment in EnergyPlus” Sept. 2013. Web. Aug. 2014 http://fsec.ucf.edu/en/publications/pdf/FSEC-cr-1968-13.pdf