THE JOURNAL OF KMUTNB

Volume 31, No. 04, Month OCTOBER, Year 2021, Pages 759 - 769

Technical analysis of cold storage system with phase change material for air conditioning on building

Nanthphon Wanrinna, Chantana Punlek, Somchai Maneewan, Yothin Ungkoon

Abstract Download PDF

The objective of this study was to investigate the efficiency of the basic performance of cold storage system using phase change material (PCM-CSS) for air conditioning. The cold storage system working with the refrigerator system of 11,601 Btu/hr. at an electrical frequency of 50 Hz was tested in a laboratory certified by ISO 17025, Bitwise (Thailand) Co., Ltd. The results showed that the cooling charging process of the cold storage unit at an average of 45 min for the phase change material (PCM) to cool down to the temperature of –3.42°C. The cold discharging process of PCM-CSS was tested by controlling the airflow at the temperature of 30°C and at the average wind speed of 2.30 m/s. It was found that the reduction of the air temperature was at the maximum of 10.37°C with the average difference of 3.90°C. The discharging process would stop when the temperature of PCM was 30°C which took around 30 minutes. This revealed that the cold storage efficiency was 67.91% and the average energy of 2,910.12 Btu/hr Therefore, the PCM-CSS can be used for air conditioning in building with lightweight concrete walls. There is a possibility to study the efficiency of cold storage system and phase change materials using the photovoltaic hybrid system in the future.

Keywords

Cold Storage System; Phase Change Material; Air Conditioning

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