Experimental Study on the Effect of Intercooler on a Compressor Performance on Multistage Type Cold-storage Simulation

Arsawan, I Made (2015) Experimental Study on the Effect of Intercooler on a Compressor Performance on Multistage Type Cold-storage Simulation. Proceedings of the 4th International Conference on Applied Science and Technology on Engineering Science - iCAST-ES, 1 (1). pp. 503-509. ISSN 2975-8246

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Abstract

Multistage type cold storage is a refrigeration machine required in an industry because it functions to store food products for a long time. Bali, as a world tourist destination, will rely heavily on this cooling system in preparing services for tourists, especially in the food and beverage sector. Multistage type cold storage is designed to reach the evaporator temperature below -30ºC thus the used compressor performance must be able to produce maximum refrigeration effect. Two compressors placed in succession or connected in series complete this cold storage system, which is expected to achieve higher operating pressures. The temperature occurring due to the pressure increase on the second compressor will be anticipated by installing an intercooler aiming at preventing excessive heat or over heat during the compression. The extent to which the important role of the intercooler as a stabilizer of operating temperature in this cooling cycle will be shown in its working cycle with a Mollier diagram (P-h diagram). The data obtained during the operation of the multistage type cold storage is then transferred to the P-h diagram of R134A to determine the cycle diagram and the enthalpy which then determines the amount of COP, the maximum temperature achieved by the system, and its energy requirements. The calculation results obtained using the intercooler COP is 1.83, and the maximum temperature achieved is 67ºC. Without using the intercooler, the system’s COP is 1.80 and the maximum temperature achieved is 89.5ºC

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