OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Assuming the temperature distribution in the storage tank is linear (∆T α ∆L), where L is the height of the storage
tank), we get;
Where T x , T L and T 0 are the temperature of water at position X, L and O from the bottom of the storage tank. Then
we obtain the exergy from storage tank to users ( ) by use the following equation:
(6)
6. Conclusion
The study of solar water heater based on exergy analysis is done in this paper. the conversion of solar radiation in
the evaluation of direct-solar systems leads to extremely high exergy losses in the direct solar systems.
Subsequently, the optimisation of these systems should be oriented so as to reduce the magnitude of exergy losses in
the conversion device. Exergy efficiency of solar systems is highly dependent on the daily solar radiation and
radiation intensity. To improve the exergy efficiency, we must select the material and design the number layer of
transparent cover and a judicious choice of the length of pipe is necessary. It is a good way to find out to design a
new style of storage tank, because large exergy losses in the storage tank.
7. Suggestions for Future work
• In this study, the flat plate collector is considered for analysis and it would be a good initiative to explore the
impact of other types of solar collector such as an evacuated tube or a concentrated collector.
• In this paper, only two components of the solar water heater are analyzed. Other components such as pump and
piping system could also be considered. Analysis of other components would help in calculation of pressure
drop across the system in order to select the pump and optimize the piping size.
References
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