Encapsulation surface roughness effect on the performance of cool storage systems
| Autor: | Ismail M.M. Elsemary, Saber Abdo, R. Y. Sakr, Ahmed A. Altohamy, Ahmed Attia, M.A. Abdelrahman |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
geography
geography.geographical_feature_category Materials science Renewable Energy Sustainability and the Environment 020209 energy Energy Engineering and Power Technology Cool storage 02 engineering and technology Surface finish 021001 nanoscience & nanotechnology Inlet Phase-change material Energy storage Volumetric flow rate Surface roughness Solidification Distilled water PCM 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Composite material 0210 nano-technology Mass fraction |
| Zdroj: | Altohamy, A, Elsemary, I, Abdallah, S R, Adbelrahman, M A, Attia, A & Sakr, R Y 2020, ' Encapsulation surface roughness effect on the performance of cool storage systems ', Journal of Energy Storage, vol. 28, 101279 . https://doi.org/10.1016/j.est.2020.101279 |
| ISSN: | 2352-152X |
| Popis: | Cool Storage is a well-known technique that been used to increase the energy efficiency of cooling systems. This paper represents a novel experimental work for the effect of internal capsules surface roughness on the performance of encapsulated cool storage systems. In this study, distilled water was used as a phase change material inside capsules. Internal surface roughness of 0, 3, 7 and 12 μm were tested using the same heat transfer fluid Characteristics. Heat transfer fluid (HTF) composed of 50–50 wt. of (water–ethylene glycol) was used with a fixed volume flow rate of 12 L/min LPM and four different inlet temperatures of −6, −8, −10 and −12 C. The solidified mass fraction, charging rate and energy storage were calculated and plotted versus the charging time to determine the surface roughness effect on the cooling performance of the system. Results showed that the internal surface roughness of capsules had adverse effect on the system performance through increasing the total freezing (charging) time. Results also indicated that the charging time increased by 14–17% at inlet flow temperature of −12 and −6 C, respectively at the higher roughness values compared with the smooth surface capsule e.g. zero roughness parameter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect