A Study on the Supercooling Characteristics of Tma-Water Clathrate Compound as Low Temperature Latent Heat Storage Material

Kim, Chang Oh; Chung, Nak Kyu; Kim, Jin Heung

doi:10.1142/9789812790194_0123

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distilled water used as reference PCM had the supercooling temperature of −8.3 • C. The increased supercooling temperature prolongs the retention time of the liquid phase that is the duration where the PCM maintains its liquid phase until entering the phase change section. The extended liquid phase of the PCM with increasing the concentrations of the eutectic molten salts can influence the operation time of a compressor, eventually decreasing the COP of the freezing system [1,10]. Since the energy input is essential to initiate the phase change of PCM for our system at the beginning stage of operation, choosing the PCM with 1 wt.% eutectic molten salt compounds can reduce the total energy added to a refrigerator, increasing the energy efficiency.…”

Section: Performance Experiments Of a Refrigerator With Pcmmentioning

confidence: 99%

“…Thermal energy storage, which uses a phase change material (PCM) to store and reuse thermal energy, is the most popular traditional energy storage technique. Moreover, as the process of energy storage and reuse through a PCM is eco-friendly, i.e., it generates no toxic chemicals, no pollutants, and no noise [1,2]. This energy storage technique is the most widely used in the building, solar energy, and textile industries [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Experimental Investigation of Thermal Characteristics of Phase Change Material Applied to Improve the Isothermal Operation of a Refrigerator

Lee

Park

2018

Energies

View full text Add to dashboard Cite

We investigated the thermal performance of a refrigerator with a functional duct unit (FDU) which was charged with a phase change material (PCM) and designed to replace the existing expandable polystyrene (EPS) duct unit. Since the performance of the FDU is dependent upon the thermal characteristics of the PCM, the eutectic water–salt solution as the PCM was prepared and tested to optimize the thermal characteristics. The thermal properties of the PCM were examined by the T-history method. When the PCM contained 1 wt.% eutectic molten salt compounds, the phase change temperature was approximately −0.5 °C, the supercooling temperature was approximately −2.9 °C, and the latent heat was 304.9 kJ/kg. Compared with other PCMs of different eutectic molten salt concentrations, this PCM was found to have the most appropriate thermal properties for the FDU. Therefore, the PCM with 1 wt.% eutectic molten salt compounds was used in the FDU, which was installed in a 200 L top-mounted freezer (TMF). For a quantitative comparison of the operational performance, an FDU and an EPS duct were installed alternately in a refrigerator operated under the same conditions and analyzed in terms of internal temperature variation and operational characteristics. When the EPS duct was replaced by the FDU, the temperature deviation measured during a defrosting operation was observed to become smaller. Moreover, during a power outage, the refrigerator with the FDU released heat owing to the phase change of the PCM, thereby preventing temperature rise inside the refrigerator.

show abstract

Section: Performance Experiments Of a Refrigerator With Pcmmentioning

confidence: 99%