SOLAR HOT WATER
Among the vast array of renewable energies, solar water heating remains today one of the most simple and efficient technologies. Solar water heating systems save customers up to 50-70% of gas expenses, and can achieve rapid payback periods. Basically, you will not use your gas boiler system as often, therefore reducing your gas usage.
How It Works
Indirect active circulation system using a pressurized closed loop of antifreeze solution to transfer the heat from the solar system. The main system components include evacuated tube or flat plate collectors, solar storage tanks, heat exchangers, controllers, and circulating pumps. Existing tanks or solar storage tanks are used as heat storage, and internal or external heat exchangers are used to transfer the heat from the antifreeze solution to the potable water. A circulating pump and a differential controller are used, and a second pump may be used for potable water depending on system configuration. The controller pumps the heat transfer fluid through the collectors when enough solar energy is available to heat the potable water, then transferring the heat in a heat exchanger. Being a pressurized loop also requires the use of an expansion tank to maintain a constant pressure. Closed loop antifreeze systems are the most versatile type of solar water heating systems and the most commonly used worldwide. They are suitable for residential and commercial applications in all climates, offering complete freeze protection by using an antifreeze solution.