Save money with solar powered water heater panels
Solar water heating is a very good way to heat your home. Not only can you save up to 70 percent on your heating bills, but it’s also a very green option.
Our green solar water heating company offers a variety of solar hot water heating products and solutions that allow you to use the sun’s power to provide hot water for all your needs.
The sun heats a solution
in the rooftop solar collectors.
The heated solution is pumped through the heat exchanger in the hot water tank.
The heat exchanger heats the water in the hot water tank and the solution recirculates back to the rooftop solar collectors, where the cycle continuously repeats.
The heated water in the hot water tank in now ready for use in the home.
The collectors, including solar water heating panels that collect the heat from the sun, come designed either as a flat plate collector or an evacuated tube. There are also different systems that are designed for the delivery of the heat to a building, such as a drain back system or a closed loop pressurized system. In the USA, solar powered water heaters are commonly used.
Flat panels are a metal box which has a glass front that allows the ultraviolet rays of the sun to pass through, making them a common choice for solar water heating. At the back of the box, there is an absorbing material that collects the heat. In between the front and the back of the box, there are copper pipes that absorb the accumulated heat that is trapped in the box and transferred to the liquid that runs in these pipes.
Evacuated tubes do the same thing, but instead of a box, there are sets of glass tubes that trap the sun rays inside them and transfer it via a copper tube to the liquid that runs inside these copper tubes. Either one of these methods of collecting heat from the sun might be used for a solar powered water heater and could include a drain-back system or a closed-loop pressurized system.
The drain back system, commonly used in solar water heating, is a system that, when there is no call for hot water, the liquid in the system drains back into a holding tank and will stay there until the next call for hot water. This type of system does not require a circulating pump for the liquid that runs through the collectors, but it does need a careful design with a continuous pitch of the delivering pipes in order to provide a gravity-based drain function.
The closed-loop pressurized system, often used for solar powered water heaters, uses a pump to circulate the heated liquid between the collectors and the hot water holding tank inside a building. Such systems often require a design that provides for cooling the liquid when it gets too hot.
In our colder climates, these systems will use glycol as its liquid, a non-toxic antifreeze, while in warmer climates, water will be used as the liquid inside the heating loop.
No matter which system is in use, these systems are designed as a supplementary system to the conventional heating system in the house. A good design will allow for a 60 to 70 percent savings on heating bills.