Pure Refrigerants vs. Zeotropic Mixtures in Heat Pumps: Do zeotropic mixtures exceed the efficiency of R-290?
The refrigerant has a significant influence on the operating characteristics of Heat Pumps. In this presentation, we compare R-290 to alternative low-GWP refrigerants (mainly zeotropic mixtures) experimentally, to derive the best performing refrigerant for residential Heat Pumps.
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When & Where
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Format:
Lecture
Language:
English
Session description
The refrigerant has a significant influence on the operating characteristics (efficiency, heating capacity, operating envelope) of a Heat Pump. Due to political regulations (e.g., European F-Gas Regulation), the hydrocarbon R-290 (propane) is currently state of the art for new Heat Pumps within the building sector. In addition, many research studies deal with zeotropic mixtures based on low-GWP refrigerants to further improve the operating characteristics of heat pumps by utilizing the temperature glide of the mixtures. However, most investigations are simulation-based and their experimental validation is missing, yet.
Thus, we present the experimental results of low-GWP refrigerants (pure fluids and mixtures) in a brine-water Heat Pump testbench and compare the results to R-29 ...
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