Author(s)

Ernest Kyekyere¹, Hiram Ndiritu², Meshack Hawi², Polline Mwambe¹

¹Department of Mechanical Engineering, Pan African University Institute for Basic Sciences, Technology and Innovation, Nairobi, Kenya.
²Department of Mechanical Engineering, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.

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.

Solar Water Heater, Water-in-Glass Evacuated Tube, Solar Collector, Solar Irradiation

Kyekyere, E. , Ndiritu, H. , Hawi, M. and Mwambe, P. (2021) Performance of Water in Glass Evacuated Tube Solar Water Heater under Kenya Climatic Condition. Computational Water, Energy, and Environmental Engineering, 10, 37-48. doi: 10.4236/cweee.2021.102003.