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 appropriate to the ambient temperatures in which they are used. In the case of chillers using air condensers, the temperature of the outdoor air 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 energy consumption of the compressor, 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. In conditions where waste heat is available, this configuration benefits in reducing overall energy consumption for cold production. An additional benefit of this configuration is the reduction in the amount of refrigerant used, which results from the design of the chiller with a plate heat exchanger.

The work presents an analysis of the thermodynamic benefits of various refrigerants resulting from the reduction of 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