Enhancing Thermal Efficiency in Solar Water Heaters: The Role of Reflective Walls

Diagram of a tilted rectangular solar collector with a rolled component above a slanted base, illustrating the system geometry (Figure 1).
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With tremendous promise for environmentally friendly and economically viable solutions, solar water heaters have emerged as a prospective replacement for traditional energy-intensive water heating techniques. Integrated pressure solar water heaters have become more popular among different solar water heater designs because of their capacity to function under high-pressure settings, making them appropriate for both domestic and commercial applications. The best way to gather and use energy from such systems is to increase their thermal efficiency, which will also aid in overall energy conservation efforts. Reflective mirrors are used to reflect solar radiation from different dimensions, and a material absorbs incoming radiation at the same distance. Coordinates and time are determined for precision. The thermal reflection attributes of the solar heater material and layers are established, with projection altitude angle variations set from 0 to 40 degrees. The results show the temperature gradient favors reflectors at a distance of 5 cm, reaching 312 K at 1:00 pm. The temperature on the solar collector and reflector increases at a distance of 5 cm, reaching 318 K. The opacity wall absorbs solar radiation better than the obstruction wall, converting it into heat at 315 K. The altitude angle of 0 is better than 40 degrees, as the reflector reflects the radiation through tubes, resulting in higher solar radiation. The presence of the reflector improves the angle to 0 compared to 40 degrees. This knowledge represents the ease of choosing the angle of incident solar radiation in terms of installing solar collectors. © 2024 The authors. This article is published by IIETA and is licensed under the CC BY 4.0 license (http://creativecommons.org/licenses/by/4.0/).

https://www.scopus.com/pages/publications/85192347676?origin=resultslist

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Ass.Prof.Dr.Wajeeh Kamal Hasan
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