This simple diagram of a solar thermal water heating system.  Fluid is routed through the solar collectors.  The collector consists of a tempered glass and  copper baffle and fin system, specifically designed to capture maximum solar radiant energy. A heat activated sensor controls a circulating pump so the system automatically comes on when sunlight is available.

The heated fluid is routed to an insulated storage tank where the heat is transferred to the water supply, then  the fluid is cycled back to the collector for further heating. 

The solar water heater can act as a stand alone system or as a pre-heater for an existing gas or electric water heating system .  The heated water can be used for typical hot water applications or can support a radiant floor or baseboard space heating system. 

The insulated storage tank typically contains between 80 and 120 gallons of water.  Because the tanks are well insulated,  heat can be stored over several days, providing hot water even during overcast conditions.  Because the solar thermal principle is based on radiant energy, these systems will work any time of the year when the sun is out.  Outside temperature has minimal affect on the system performance.  In fact, bright snowy conditions are actually desirable as the solar energy is reflected off the snow surface to the collector.

When designing a domestic solar water heating system, assume 2 collectors for each adult in the household for colder climates. 

 

EVENT HORIZON SOLAR & WIND © (269) 795.5285