Emerging Trends in Solar Water Heating Technologies

Abstract

This article presents a comprehensive and detailed review focused on the design aspects of solar water heating (SWH) systems, with a particular emphasis on the technological advancements that have shaped their evolution. The first section offers an in-depth analysis of the key components integral to the functionality and efficiency of SWH systems, including the solar collector, storage tank, and heat exchanger. The review traces the development of these components, highlighting improvements in materials, configurations, and thermal efficiency. The second section explores the latest innovations in alternative refrigerant technologies, prompted by environmental and regulatory challenges, and their impact on system performance. Additionally, this section investigates cutting-edge advancements, such as enhanced absorber coatings, advanced insulation techniques, and optimized heat exchange designs, all of which contribute to significant improvements in the thermal performance, reliability, and cost-effectiveness of SWH systems. This article identifies opportunities for further research and development to advance the practical and economic viability of solar water heating technology.