A review on solar water heating technology: Impacts of parameters and techno-economic studies

Abstract

Abstract Background Solar water heating is a highly sustainable method of extracting thermal energy from the sun for domestic and industrial use. In residential buildings, thermal energy from a Solar Water Heater (SWH) can be used to heat spaces, shower, clean, or cook, either alone or in combination with conventional heating systems such as electricity- and fossil-fuel-based heaters. In the industrial sector, SWHs can be used in various high-temperature fluid processes, including chemical processing, manufacturing, power generation, and construction. Despite the technological advancements in water heating systems, there are still some significant technical and economic challenges that limit their widespread adoption and commercialization. Despite their potential to revolutionize the industry, these systems remain in the shadows of unsustainable water heating solutions. Main body of the abstract This paper reviews recent selected publications on the technical and techno-economic aspects of solar water heating technology. The discussions include the effects of some parameters and components on the overall thermal efficiency of the SWHs as well as the techno-economic prospects of the technology. In addition, the paper provides the existing research gaps and recommendations for future research directions. Short conclusion The present review paper is unique because it condenses the recent studies carried out on both the technical and techno-economic aspects of the SWHs. It provides a comprehensive framework for interested readers and researchers to gain insights into the technical and economic status of SWHs. However, it is not an exhaustive study. The information presented can aid researchers in conducting further research on the subject, as well as understanding the future of SWHs.