Solar Pool and Water Heater

SOLAR POOL AND WATER HEATER

Solar Pool Heater

Commercial Solar

Water Heater

Solar pool heaters work by taking pool water that has passed through the pool's filter, and instead of immediately returning to the pool, it is diverted towards the roof where the pool heaters are located.

As the cool water passes through the solar pool heaters, it is warmed using the sun's energy, and then returned back to the pool.

One of the biggest benefits is allowing you to enjoy your investment in your pool longer each year by extending your swimming season significantly.

You can enjoy warm pool water much earlier than before, and extend your swimming season by months, or even all year long, depending on the area in which you area located.

Solar water heating or solar hot water is water heated by the use of solar energy. Solar water heating systems are generally composed of solar thermal collectors, a water storage tank or another point of usage, interconnecting pipes and a fluid system to move the heat from the collector to the tank. This thermodynamic approach is distinct from semiconductor photovoltaic (PV) cells that generate electricity from light; solar water heating deals with the direct heating of liquids by the sun where no electricity is directly generated.

A solar water heating system may use electricity for pumping the fluid, and have a reservoir or tank for heat storage and subsequent use. The water can be heated for a wide variety of uses, including home, business and industrial uses. Heating swimming pools, underfloor heating or energy input for space heating or cooling are common examples of solar water heating.

Residential Solar Thermal installations fall into two groups

Passive (sometimes called "compact") and Active (sometimes called "pumped") systems

The attraction of passive solar water heating systems lies in their simplicity.

There are no mechanical or electrical parts that can break or that require regular supervision or maintenance. Consequently the maintenance of a passive system is simple and cheap. The efficiency of a passive system is often somewhat lower than that of an active system and overheating is largely avoided by the inherent design of a passive system.

Because of the fact that active systems allow freedom in the location of the storage tank, the tank can be located where heat loss from the tank is reduced, e.g. inside the roof of a house. This increases the efficiency of the solar water heating system.

Active systems can tolerate higher water temperatures than would be the case in an equivalent passive system. Consequently active systems are often more efficient than passive systems but are more complex, more expensive, more difficult to install and rely on electricity to run the pump and controller.

Active systems with intelligent controllers:

Modern active solar water systems have electronic controllers that permit a wide range of functionality such as full programmability; interaction with a backup electric or gas-driven water heater; measurement of the energy produced; sophisticated safety functions; thermostatic and time-clock control of auxiliary heat, hot water circulation loops, or others; display of error messages or alarms; remote display panels; and remote or local datalogging.

A typical programmable differential controller:

The most popular pump controller is a differential controller that senses temperature differences between water leaving the solar collector and the water in the storage tank near the heat exchanger. In a typical configuration, the controller turns the pump on when the water in the collector is about 8-10°C warmer than the water in the tank and it turns the pump off when the temperature difference approached 0 °C. This ensures the water always gains heat from the collector when the pump operates and prevents the pump from cycling on and off too often.

Although the pumps of most active systems are driven by mains electricity, many active solar systems obtain energy to power the pump by a photovoltaic (PV) panel.

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