Performance of a Coil-pipe Heat Exchanger Filled with Mannitol for Solar Water Heating System. (August 2015)

• Record Type: Journal Article
• Authors: Ling, Ziye; Zeng, Guohao; Xu, Tao; Fang, Xiaoming; Zhang, Zhengguo
• Is Part Of: Energy procedia. Volume 75(2015)
• Page Start: 827
• Page End: 833
• Publication Date: 2015-08
• Subjects: solar water heater -- solar thermal energy -- phase change material -- latent heat storage -- mannitol ;; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2015.08.001
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: Solar water heating systems that incorporate latent heat storage unit deals with instabilities of insolation. But most previous studies focus on phase change materials (PCMs) with phase change temperature (Tm ) below 80 o C. In this study, we investigate the performance of mannitol (Tm: 166.7, enthalpy of phase change γ: 323 kJ kg -1 ) in storing solar thermal energy and producing hot water. Results show mannitol can store high-level energy and the thermal energy storage performance are affected by the inlet flow rate and temperature of heat transfer fluid. 14 kg mannitol with latent heat activated can heat 100L water from 30 up to 50 o C in 6 hours