文档介绍：Solar aspects of papers
Computational Study of Hybrid Water Heater with Evacuated Glass Tube
Solar Collector and Rice bustion
Chaiwat Wannagosit and Piyanun Charoensawan
Department of Mechanical Engineering, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand; Tel.: 05-596-4215; Fax: 05-596-4000
E-mail: ******@
Abstract
The thermal performance modeling of hybrid water heater with evacuated glass tube solar collector and flue gas of rice bustion was developed. The solar global radiation and ambient air temperature data used in the system modeling belongs Phitsanulok province from 7:00 . to 5:00 . in the summer season. The system can be divided into two parts, . evacuated glass tube thermosyphon solar collector and thermosyphon heat exchanger with flue gas of rice bustion. The evacuated glass tube was a coaxial double-layer tube made of Borosilicate. Its outer tube diameter and inner tube diameter were 58 and 47 mm respectively. The inside cavity of evacuated glass tube holed thermosyphon which was made of copper tube and filled with R134a at the filling ratio of 70% of evaporator volume. For latter, The temperature and flow rate of flue gas that was released from the cyclone furnace and used as a heat source of heat exchanger were constant at 150oC and 50 m3/min. The heat exchanger was consisted of array of thermosyphon which was m