It is observed that the performance of the natural circulation flat plate solar water heater (FSH) deteriorates faster due to scaling. This paper quantifies the effect of scaling on instantaneous efficiency as variation in Hottel-Whillier-Bliss (H-W-B) constants. The drop in a0 and a1 values with scale growth is evaluated and brought out as the H-W-B plot. The comprehensive analysis using developed software FLATSCALE reflects the deviation of circulating ratio with scale thickness. The individual and combined effect of mass flow rate and thermal resistance on the performance of FSH is also discussed.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Process Chemistry and Technology
- Fluid Flow and Transfer Processes