Indirect Solar Water Heater System

6 5 16 in a direct system the service water is directly circulated between the water tank and the collector while in an indirect system a heat transfer fluid usually antifreeze distilled water.

Indirect solar water heater system.

Indirect solar system ite. The optimum installation can be constructed by using different accessories. The ite as well as the its can be part of a solar water heating system. Active indirect systems in which a heat transfer fluid like propylene glycol is heated up within the solar collectors and then transfers the heat to the water supply with a heat exchanger in a closed loop system.

Some heat loss occurs while the transfer fluid circulates the system. 6 4 while the swhs which are fitted with heat exchangers are called indirect systems shown in fig. Active solar heaters are primarily of three types direct indirect and drain. Instead of relying on glycol for freeze protection this system allows all the water in the array to drain back from the array and into a storage vessel in the solar loop when the pump is turned off.

Swh systems which do not include a heat exchanger are called direct systems shown in fig. Conventional storage water heaters usually provide backup and may already be part of the solar system package. Indirect systems water is heated directly into solar collectors and circulating in your home it is best suited for cold or freezing conditions where the absence of heat exchangers means that cold cold water cannot be heated effectively.