Closed Loop System Solar Water Heater

Solar controller to automatically control the pumps.

Closed loop system solar water heater.

There are two main types of solar hot water systems. Fluid expansion tank and safety relief valve. The glycol is separated from the potable water by means of a heat exchanger that transfers the energy from the array into the storage tank. Glycol or some equivalent antifreeze fluid fills the collector and associated routing pipes.

Closed loop active antifreeze systems are the most versatile and failsafe of all the solar supplemental water heating systems. A typical closed loop solar water heating system consists of. Sized for family load. A special water heater tank incorporating a heat exchanger works in conjunction with one or more flat plate roof mounted collectors.

Heat exchanger to exchange the heat between the hot solar panel antifreeze and the clean potable water. Indirect closed loop solar glycol systems use propylene glycol as the heat transfer fluid in the solar array to overcome issues of freezing glycol can tolerate 60f in high concentrations and eliminate scaling. The type of system affects overall system design and each type of system has strengths and weaknesses. Active closed loop systems use electric pumps valves and controllers to circulate the heat transfer fluid usually a polypropylene non toxic unlike polyethylene glycol water antifreeze mixture through the collectors.

A closed loop often referred to as a glycol or anti freeze system a drainback system.