This paper provides verification results of the Energy Plus variable refrigerant flow (VRF) heat pump computer model using manufacturer's performance data. The paper provides an overview of the VRF model, presents the verification methodology, and discusses the results. The verification provides quantitative comparison of full-and part-load performance to manufacturer's data in cooling-only and heating-only modes of operation. The VRF heat pump computer model uses dual range biquadratic performance curves to represent capacity and energy input ratio (EIR) as a function of indoor and outdoor air temperatures and dual range quadratic performance curves as a function of part load ratio for modeling part-load performance. These performance curves are generated directly from manufacturer's published performance data. The verification compared the simulation output directly to manufacturer's performance data and found that the dual range equation-fit VRF heat pump computer model predicts the manufacturer's performance data very well over a wide range of indoor and outdoor temperatures and part load conditions. The predicted capacity and electric power deviations are comparable to equation-fit HVAC computer models commonly used for packaged and split unitary HVAC equipment.
Verification of a VRF Heat Pump Computer Model in EnergyPlus
2013
17 Seiten, 9 Bilder, 13 Tabellen, 15 Quellen
Conference paper
English
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