NDLI: Comparative Performance of Cylindrical Solar Water Heating System With and Without a Reflective Surface

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ogueke, N. V. Anyanwu, E. E.
Copyright Year	2010
Abstract	The comparative performance of a cylindrical solar water heating system with and without reflective surface is presented. The major components of the water heater are a transparent cylindrical PVC material acting as the glazing and a copper tube painted black for improved solar energy absorption. One of the systems has it’s under segment, about 45°, lined with an aluminium foil to act as a reflective surface. The two systems were tested under the meteorological condition of the Federal University of Technology, Owerri, Nigeria. Results obtained reveal a maximum exit water temperature from the solar water heater of 68 and 50°C for the reflective and non reflective surface conditions, respectively. The maximum efficiencies were determined as 70% and 40%, respectively for the reflective and non reflective surface conditions while the Hottel-Whillier-Bliss characterization showed that addition of the reflective surface improved the solar water heater’s ability to absorb energy by about 100% and reduced the rate at which it loses by up to 25%. Thus the system with a reflective surface has better capability of converting solar energy to heat for hot water generation.
Starting Page	1017
Ending Page	1033
Page Count	17
File Format	PDF
ISBN	9780791844298
DOI	10.1115/IMECE2010-37494
Volume Number	Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
Conference Proceedings	ASME 2010 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2010-11-12
Publisher Place	Vancouver, British Columbia, Canada
Access Restriction	Subscribed
Subject Keyword	Reflective surface Solar Cylindrical solar collector Water heater Comparative performance Water Heat Transparency Absorption Aluminum Solar water heating Solar energy Solar collectors Copper Water temperature Hot water Meteorology
Content Type	Text
Resource Type	Article

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