Abstract
This paper presents a performance analysis of a lab-scale propane-butane cascade heat pump with a nominal
heating capacity of 20 kWth at varying evaporation temperatures. Experimental data from the laboratory is
compared with operational data from a scaled-up industrial pilot plant (300 kWth) using the same technical
concept. The laboratory data successfully extends the operational range of the heat pump to an evaporation
temperature of -15°C, achieving a maximum temperature lift of 124 K. The industrial plant shows higher
combined COPs, reaching up to 3.7, and generally higher compressor efficiencies. This improved performance
is likely due to multiple factors, although limited data from the industrial plant prevents a definitive
conclusion. The study suggests that this heat pump technology is suitable for industrial applications requiring
a wide range of temperature levels and lifts, particularly for simultaneous heating and cooling down to -15°C.
Keywords: Refrigeration, Hydrocarbons, High Temperature Compressors, Combined Heating and Cooling,
Energy Efficiency
heating capacity of 20 kWth at varying evaporation temperatures. Experimental data from the laboratory is
compared with operational data from a scaled-up industrial pilot plant (300 kWth) using the same technical
concept. The laboratory data successfully extends the operational range of the heat pump to an evaporation
temperature of -15°C, achieving a maximum temperature lift of 124 K. The industrial plant shows higher
combined COPs, reaching up to 3.7, and generally higher compressor efficiencies. This improved performance
is likely due to multiple factors, although limited data from the industrial plant prevents a definitive
conclusion. The study suggests that this heat pump technology is suitable for industrial applications requiring
a wide range of temperature levels and lifts, particularly for simultaneous heating and cooling down to -15°C.
Keywords: Refrigeration, Hydrocarbons, High Temperature Compressors, Combined Heating and Cooling,
Energy Efficiency
