Research And Development Of Solar Energy Central Hot Water System

Present intense energy shortage and serious pressure from environment protection make solar industry into high speed development. Solar water heaters are stepping into crowds of families, solar water heating system is more and more understood, accepted and used. While in the progress of marketing and promotion, many problems present, including roof top area limit which affect solar water heat-er application rate, and non-preset buildings which causes rough installation or even accident.Based on above mentioned situation, Concentrated Collecting and Divisional Unit Storage SolarThermal System is researched and developed. The whole system include heat-collect system,heatstorage system,control system, as well as piping system.With this technology, the heat collect systemis integrated with building perfectly, heat storage system are in each family, double-circuit-loop isadopted, one as solar collecting and water heating loop, the other as hot water supply loop, avoidingoverloading of building top where to install this tank and being frozen. The main advantage of thissystem guarantees heat cycling at point of application by forced power cycling, avoiding imbalancedcold and hot water mixing and saves water. There would be no limit in collector area after this powercycling equipment, circulation stops working when it does not reach to pre-set value, which savesenergy.Solar concentrate heating division storage system reduces the building space restrictions oninstallation of solar water heaters greatly.By detailed technology analysing in operation cost, primaryinvestment, service life and energy efficiency, we find that this solar concentrate heating divisionstorage system is obviously better than others in cost savings, environment protection etc, and isworthy for market expanding.