Abstract
A review of solar water heating systems potential in Nigeria with their applications is presented. Thus, the paper presents an extensive study of the research carried out on the solar water heating system. In the present study, both experimental and theoretical developments in the field of solar water heater have been reviewed thoroughly. Extensive study has been conducted to further optimize the thermal efficiency of solar water heating. The paper provides a consolidated summary of the various types and components of solar water heating system that includes collector, storage tank and heat transfer fluid. Review of related past works done is included in this paper that shows different approaches from different researchers in order to improve the system efficiency. In addition to this, detailed findings and discussion on the limitations of existing research, research gap and recommended possible modifications is made.
Highlights
Solar water heating is an acknowledged innovation and is progressively being utilized as one of the cost-effective methods for heating water in private and open structures, for example, lodgings, laundries, eateries, clinics and health centers [1]
Thermosiphon Systems: In the thermosyphon system, water streams from the overhead tank to the base of the collector by natural circulation and water flows from the collector to storage tank as long as the absorber continues absorbing heat from the sun and water gets heated in the collector
The outcomes shows that on a clear day, a thermosyphon solar water heater of collector area 3.4m2 and 150 liters storage capacity performing at a collector efficiency of 60% can produce hot water of up to 800C temperature for the residential services of an average sized family at Nsukka
Summary
Solar water heating is an acknowledged innovation and is progressively being utilized as one of the cost-effective methods for heating water in private and open structures, for example, lodgings, laundries, eateries, clinics and health centers [1]. Electric heaters became less attractive due to depleting nature of conventional energy sources being use, environmental concerns and the energy cost rise. The demand for electricity is growing rapidly; within cold weather periods normally mornings and evenings when hot water demand is highest, the electrical energy facilities are often overstretched, resulting in some cases to power shedding These issues can be dealt with by removing part of the energy demand for hot water purposes from electricity by utilizing solar water heater. Solar water heating system is renewable energy technology and has been used in many countries of the world This natural energy is absolutely free and the supply is unlimited in the day whenever there is sunlight. The effect of sizing of part on the system is studied and a novel strategy for the system part is proposed to improve the design and performance of solar water heating systems
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