TITLE:
Performance of Water in Glass Evacuated Tube Solar Water Heater under Kenya Climatic Condition
AUTHORS:
Ernest Kyekyere, Hiram Ndiritu, Meshack Hawi, Polline Mwambe
KEYWORDS:
Solar Water Heater, Water-in-Glass Evacuated Tube, Solar Collector, Solar Irradiation
JOURNAL NAME:
Computational Water, Energy, and Environmental Engineering,
Vol.10 No.2,
April
13,
2021
ABSTRACT: Solar water heaters which provide a cost-effective
and environmental friendly approach to hot water generation are in widespread
application. Evacuated tube solar water heaters perform better than flat plate
solar water heaters as a result of their greater surface area exposed for
sunlight absorption. Water-in-glass evacuated tube solar water heaters are
widely used as compared to heat-pipe solar water heaters due to their short
payback periods. In this study, the performance of water-in-glass evacuated
tube solar water heater is investigated through experiments under the climatic
conditions in Kenya. The results revealed a daily efficiency range of 0.58 -
0.65 and a daily final outlet temperature greater than 55°C given an initial
temperature of 25°C.