Open Loop Solar Water Heater

Water heated by means of solar energy is called solar hot water system. Solar water heater is usually composed of a fluid system and solar thermal collectors to move the heat from the collector to its point of usage. This system may use electricity for pumping the fluid, and have a tank or reservoir to store heat and consequent use.

Solar water heater may be used to heat water for several uses, including home and industrial areas. Solar Water Heater is environment friendly and reduces the monthly utility costs. Some specific examples of solar water heater usage are - swimming pool heating, energy input for space heating or cooling, under floor heating.

Solar water heater come in many types, one of the best is an open loop heater. An open loop heater has many advantages. The foremost advantage is that it is the least expensive and simplest heating system to install. Open loop heater has no exchanger, so it efficiently transfers heat directly to water. Therefore, it is much faster and simpler than others are.

Open loop solar water heater works under a standard pressure line so in case there is not enough solar energy available, electrical back up automatically switch on by the controller. Open loop system when used in industrial is known as groundwater heat pump. Corrosion is always well thought-out for any system involving high temperatures and water, heavily chlorinated water is a strong corrosive agent. So the open loop heaters are not recommended to be used in chlorinated water. This water heater is very efficient but it is not appropriate for the hard or acidic water as the corrosion caused due to hard water disable the system very soon.

These open loop heaters are well liked in nonfreezing climates. Open loop heaters are not apt for the areas which experience-freezing climate for a sustained period. Occasionally freezing climate or mild climate can acclimatize these by considering the freeze protection. Recirculation systems are a explicit type of open loop system that endow with the freeze protection system.

They use the system pump to circulate warm water from storage reservoir through collectors and uncovered piping when temperatures come within reach of freezing. A freeze valve can also be used to for additional protection from freeze. In freezing weather, this valve dribbles warmer water through the collector to prevent freezing. Activating the freeze protection often wastes electricity and stored heat so should be used only where mild freezes occur seldom.