Closed Loop Solar Domestic Hot Water Heating System

This is an example of how to set up a tankless water heater as a heat source and for your domestic hot water.

Closed loop solar domestic hot water heating system.

Closed loop solar water heater systems sometimes referred to as anti freeze or glycol systems include the heat collectors insulated piping a circulating pump an expansion tank a hot water storage tank a heat exchanger solar fluid usually a solution of water and nontoxic propylene glycol antifreeze a controller valves and gauges. Solar heating system piping diagrams direct systems. Pool heating with glazed collectors commercial systems. Open loop system.

This is only an example. These systems pump heat transfer fluids usually an fda approved glycol fluid through collectors. Covers closed loop antifreeze systems and drainback systems. Active closed loop solar water heating system pumps circulate a non toxic heat transfer fluid htf through the collectors and a heat exchanger.

They are popular in climates prone to consistent freezing temperatures. Lots on installation detail. Installation basics for solar domestic water heating systems chuck marken and ken olsen. The water from the boiler to this heat exchanger flows 24 hours a day in a closed loop making the heat exchanger continuously active i e.

The valves that are usually found in the closed systems are the check valve pressure reducing valve mixing valve backflow preventer and other. In addition heat exchange and non heat exchange solar storage tanks are available. Rheem based in atlanta ga is the largest manufacturer of water heating products in north america and has been in business since 1925. A closed water heater system means that the hot water cannot expand beyond the valves and mix with the municipal water.

As you can see this allows the boiler to heat a tank of potable water which in turn can provide domestic hot water and floor heating in an open or closed configuration. Solene by aet offers rheem solar storage tanks in 80 and 120 gallon options. The flat plate collectors can be mounted in almost any configuration at great distances from the exchanger. Very good articles on selecting the components for a closed loop solar hot water heating system suitable for cold climates.

The closed loop is always full of fluid so the pump pressure requirements are much easier than those for a drainback system you don t need to worry about head pressures. This is called a closed loop heating system with domestic water. Domestic hot water and closed loop radiant space heat using a solvelox glycol and a solvelox space heat.