Closed Loop Hot Water Heater

A continuously operating pump is clearly wasteful.

Closed loop hot water heater.

However doing so in a way that doesn t waste a lot of energy is a little trickier. The kms series is similar in design but includes a parallel cooling circuit. 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.

These units are completely packaged systems designed for a maximum operating temperature. I added a return line from two locations through a check valve in. A special water heater tank incorporating a heat exchanger works in conjunction with one or more flat plate roof mounted collectors. As the loop returns to the water heater it connects at the low point of the heater.

Creating the loop is fairly easy. Whenever needed the storage tank draws heat from the heat exchanger and maintains a constant tank temperature. This loop keeps hot water going throughout the house so when a fixture is used hot water is right there. Most new solar homes feature a variation of one kind or another.

The km series of heat transfer systems is designed for closed loop temperature control of common heat transfer fluids. How to cut the wait for hot water in bathrooms that are a long way from the water heater. If you have a dedicated return line then this is a great system to use. The advantages of a continuously active heat exchanger loop are twofold.

Attach a wrench to the valve and turn counterclockwise. This assist consists of having the return pipe from the remote location being smaller than the supply pipe. A hot water loop uses a small pump to circulate hot water between a water heater and a distant bathroom or kitchen. This is always the location of the heater drain valve.

This valve is simply screwed into the heater. Near the water heater area a recirculating pump pulls the water from the furthest fixture back into the water heater creating a loop. All that is required for this loop to function is for the water heater to be below the fixtures that you want hot water at and for there to be a bit of an assist to increase the loop s performance. The valves that are usually found in the closed systems are the check valve pressure reducing valve mixing valve backflow preventer and other.