Analysis of various refrigerants in lower condensing temperatures in a hybrid adsorption-compression refrigeration system

DOI: 10.18462/iir.compr.2024.0649

Sekcia: Compressors and technologies

Stav prijatia: Abstrakt prijatý

Autori

Abstrakt

Commonly used compressor refrigeration systems are designed according to the requirements fitting to the ambient temperatures in which they are used. In the case of chillers using air condensers, the outdoor air temperature used to cool the condenser determines the selection of compressor operating parameters, particularly the discharge pressure and, consequently, the condensation pressure. Lowering this temperature reduces the compressor's energy consumption, but is limited by the maximum outdoor air temperatures for a given location.

The proposal to combine adsorption and compressor chillers within a hybrid refrigeration system allows for a significant reduction in the condensing temperature and pressure due to the continuous supply of cold generated by the adsorption unit. Where waste heat is available, this configuration reduces overall energy consumption for cold production. An additional benefit of this configuration is the reduced amount of refrigerant used, resulting from the chiller's design with a plate heat exchanger.

The work presents the design and the study of the thermodynamic benefits of various refrigerants resulting from reducing the condenser cooling temperature in an adsorption-compressor refrigeration system. The system design assumes the selection of the cooling capacity of the adsorption unit for the condensing power of the compressor system with a cooling capacity of 25 kW. The system was made and tested for various operating parameters using several refrigerants.

Kľúčové slová

refrigeration
adsorption
condensation
compression
hybrid cooling system