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http://dx.doi.org/10.3795/KSME-C.2015.3.1.001

A New Dynamic VRF Heat Hump Simulation Including Frosting and Defrosting Models  

Park, Noma (AE Lab., CTO HAE research center, LG Electronics)
Shin, Jeong Seob (AE Lab., CTO HAE research center, LG Electronics)
Chung, Baik Young (AE Lab., CTO HAE research center, LG Electronics)
Kim, Byung Soon (AE Lab., CTO HAE research center, LG Electronics)
Publication Information
Transactions of the KSME C: Technology and Education / v.3, no.1, 2015 , pp. 1-13 More about this Journal
Abstract
In this study, a new dynamic VRF-type heat pump simulation model is proposed which incorporates frosting and defrosting models. Toward this end, a simple frosting model based on the perfect analogy, and lumped system based defrost model, are proposed. Then, frosting and defrosting models are incorporated into a dynamic heat pump model which adopts segment-by-segment local heat exchanger model and map-based variable speed compressor model. Thus, the model can naturally represent locally uneven frosting and defrosting on the heat exchanger surface. Developed simulation model is validated against available experimental data to show good agreement within 10% error for capacity and COP. Finally, developed dynamic heat pump model is applied to annual heating season simulation to show that seasonal COP of heat pump is degraded by 7% due to frosting and defrosting.
Keywords
Heat Pump; Cycle Simulation; Frost Model; Defrost Model; Yearly Simulation;
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