Pustovoi H. Energy-efficient compressor chiller complex with an adsorption refrigeration module

The dissertation focuses on the study of the processes of operation of the adsorption module for cooling the air condenser of the steam compressor machine. The purpose of the study is achieved by analyzing experimental and calculated parameters to determine the operating modes of the adsorption refrigeration module. The processes of operation of the refrigerating module based on composite adsorbents were studied, the main factors affecting the refrigerating coefficient of the cycle were determined. The main requirements for the adsorption cooling module in the refrigerating system are justified, which showed the correlation between the composition of the adsorbent and the refrigerating coefficient of the cycle. An increase in the cooling coefficient of the cycle was shown when the sodium sulfate content increased by 80% in the composite coating. An increase in the value of the cooling coefficient was established with a decrease in the temperature difference of the adsorbent and the regeneration temperature ΔТ1. The maximum values of the AHM cooling coefficient for cooling the air condenser are achieved at a temperature difference of ΔT1 = 65°С for the composite coating, which contains silica gel - 20% and sodium sulfate - 80%. The operational cooling coefficient was calculated based on the composite coating "silica gel - sodium sulfate", which showed the dependence on the average daily value of solar radiation during the season. It has been established that the maximum value of the operational refrigeration coefficient of AHM is reached in the period from May to September. During this period, the daily value of solar radiation varies from 20 MJ/m2 to 23 MJ/m2, and the heat supplied to the collector is 200 MJ - 30 MJ. The increase in the operational cooling coefficient of the AHM depends on the uniformity of solar radiation during the regeneration cycle. The developed measures to reduce the condensation temperature of the steam compressor refrigeration unit showed that when using the adsorption cooling module, the condensation temperature decreases from 45℃ to 40℃ and this affects the refrigeration system as follows: 1. There is a decrease in the energy consumption of the refrigeration system when the temperature regime is set in the refrigeration cameras by 17.88%; 2. Achieving the temperature regime in a refrigerating chamber with an adsorption cooling module occurs faster than without it by 1 hour; 3. The energy consumption of the refrigeration system is reduced by 16.99% when maintaining the temperature regime in the cooling chamber; 4. The coefficient of performance (COP) of the refrigeration system increases from 1.28 to 1.50; 5. The limits of application of freons operating at low condensing temperatures R449A, R448A have increased. Implemented: the results of the scientific work "Energy-efficient compressor chiller complex with adsorption refrigeration module" were used to develop and implement an energy-efficient compressor refrigeration complex with adsorption refrigeration module in the ICOOL S-HGX34-380 industrial refrigeration system for food storage in the city of Lviv.