Investigation of the thermal behavior and energy consumption of refrigeration systems

Abstract

The object of this research study is to develop a thermal simulation model that can be used to investigate the thermal parameters of the refrigerant systems (with ON-OFF and PID control) used in cooling chambers. Moreover the model was further developed which takes into account also the types of compressors, feeder and control units used commonly in practice for energetic investigations. Using the measured energy consumption data obtained by experimental tests during the previous phase of this research work, the validation of the developed energy simulation model by MatLab R2016a could be also achieved with good agreement. MatLab software seemed to be the most appropriate tool for numerical investigations on the energy consumption of refrigeration systems used in commercial cold stores and transient behavior of the indoor air temperature of the cold store, cooling energy performance and consumed energy to the goods stored in cold store.

Determination of cop maximum of cold water loop of heat pump heating system by means of numerical-graphical optimization procedure

“…Miklos Kassai [5], [6] in his works dealt with the energy efficiency of cooling systems and heat pumps, but did not perform the energy optimization of the systems.…”

Investigation of the Thermodynamic Characteristics of the Ester Oil and R152a, R125, R134a and R123 Refrigerant Mixtures

“…The modelling of the heat pumps is based on decades of experience as both of stationary [1], [2] and the non-stationary [3], [4] mathematical models. The mathematical models are fraught with a numerous omissions and uncertainties.…”