Greatly Increase Heating Efficiency With An Active Solar Water Heater

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Solar Water heater Systems

Solar water heater systems are designed to be active, with pumps or fans to promote the gathering of heat, or passive, with no mechanical parts added to the system. Solar water heaters have been around since the late 1800's. Standard natural gas water heaters took their place in the early 1900's. For the last four decades, newer technologies have fixed many problems with solar water heaters. Problems like excessive oxidation and just plain not having enough hot water are not problems now.

The only major differences between the four different kinds of active solar water heater systems is the way in which the heat collector, which is located on top of your roof or similar location, protects itself against freezing. These systems are called: Recirculate, drain-down, drain-back, and heat exchange.

The recirculate system

This system uses an electrical pump to move water through the collector to prevent it from freezing. Moving water will not freeze, but some heat is sacrificed to do this.

The drain-down system

This system simply takes the water out of the collector by opening a valve when a thermostat indicates that the water is near freezing. If electricity is down, then the collector empties all water.

The drain-back system

This system uses a heat exchanger to store drained water from the collector when it nears freezing. The heat exchanger coordinated with a storage tank, pushes the water through to the water heater and then the rest of the house. The drain-back system has an electrical pump that works most of the time. If the pump is shut off for any reason, the heat exchanger stores the water from the collector and uses this water as the heating fluid. The heat exchanger can lose up to 10% of its heating efficiency.

The heat exchange system

This system is the only system which does not drain out any water from the collector when it nears freezing. The heat exchanger uses an oily fluid that prevents freezing to travel to the collector and keep the water warm. Some of these systems use compressed air to heat the water instead of an oily fluid.

All active solar water heater systems have pumps and fans working to keep them heating and moving water. These systems need maintenance on a regular basis. These systems should still be able to be bypassed by a standard water heater if necessary.

Article Source: http://depositarticles.com/

Visit www.waterheater-info.com or contact johnnyhayneser@gmail.com for more information on solar water heaters, tankless water heaters, traditional tank-type water heaters, water heater repair, new installation, brand name information, maintenance, and warranty info.

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