외부온도 노출에 대한 PCM 축냉 덕트의 성능 특성에 대한 해석적 연구
Performance Characteristics of Phase-Change Material Cold-Storage Duct Exposed to Outside Temperature
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Recently, side-by-side refrigerators are becoming commercialized because of their left and right compartments. In addition, refrigerators and freezers are becoming commercialized because they can be opened from the top and bottom. However, when a power failure occurs or the set temperature is reached, a refrigerator is not supplied with power. At this time, when the refrigerator is used, the food becomes stale owing to the high external temperature. Hence, a phase-change material (PCM) cold-storage duct needs to be utilized in a refrigerator to prevent this situation. In this study, temperature variations of a PCM cold-storage duct were analyzed when refrigeration inside was exposed to the outdoor temperature. The PCM cold-storage duct was exposed to 25 °C for 60 min. The PCM cold-storage temperature changed from 1.5 to 4.8 °C at the top and bottom, respectively, and -14.7 to -8.2 °C at the left and right sides, respectively. Additionally, the cooling air in the PCM cold-storage duct started to coagulate from the upper side having a large heat-exchange area and solidified from the side to the center with the coagulation nucleus.
Abstract
Recently, side-by-side refrigerators are becoming commercialized because of their left and right compartments. In addition, refrigerators and freezers are becoming commercialized because they can be opened from the top and bottom. However, when a power failure occurs or the set temperature is reached, a refrigerator is not supplied with power. At this time, when the refrigerator is used, the food becomes stale owing to the high external temperature. Hence, a phase-change material (PCM) cold-storage duct needs to be utilized in a refrigerator to prevent this situation. In this study, temperature variations of a PCM cold-storage duct were analyzed when refrigeration inside was exposed to the outdoor temperature. The PCM cold-storage duct was exposed to 25 °C for 60 min. The PCM cold-storage temperature changed from 1.5 to 4.8 °C at the top and bottom, respectively, and -14.7 to -8.2 °C at the left and right sides, respectively. Additionally, the cooling air in the PCM cold-storage duct started to coagulate from the upper side having a large heat-exchange area and solidified from the side to the center with the coagulation nucleus.
참고문헌 (4)
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- Jun, Y. H., "Development and Field Test of the PCM Cold Stroage System to apply Nighttime Electric Power to Refrigeration Warehouse", Proceeding of SAREK, pp.751~754 (2015)
- Jun, Y. H., "Development and Field Test of a Refrigeration Truck Using a Forced Convection Type PCM Cold Storage System", SAREK Summer Annual Conference, pp.130~133 (2016)
- ANSYS Inc, "ANSYS Fluent Theory Guide Release 15.0", ~ (2013)