Experimental Investigation On Ice-On-Coil Thermal Energy Storage System
Taveewat Suparos 1 Jirawan Tiansuwan 2 Tanongkiat Kiatsiriroat 3
1 Department of Mechanical Technology Education, School of Industrial Education,
2 Department of Thermal Technology, School of Energy and Material, King Mongkut's University of Technology Thonburi
91 Pracha-Utitt Rd. Bangmod Tungkru Bangkok 10140,Thailand
3 Department of Mechanical Engineering, Faculty of Engineering, Chiangmai University
239, Huay Kaew Rd., Muang District, Chiangmai, 50200 Thailand
In the present study freezing and melting experiments, performance with an ice on coil thermal energy storage system for both charging and discharging processes has been investigated. This paper describes the basis heat transfer analysis and presents the characteristics of the charging and discharging processes. The storage of 400 liter is a well-insulated plastic tank with 10 mm thickness. The cooling coil is copper tube with 10 mm of the diameter and 300 m of the length. Glycol – water solution at – 4 °C to – 8 °C is circulated in the copper coil tube for generating ice, and warm water is fed into the storage to melt the ice and generate cool water. Experimental study has been performed to evaluate the cooling rate and the heat transfer coefficient. These data are used to develop the mathematical model for evaluating the water temperature and the solid-liquid fractions during the ice formation and melting. The simulated results agree well with those of the experiments.