Solar water heaters perform three basic operations before the hot water comes out of your tap:
1. Energy Collection: Sunlight is collected and converted to heat energy.
The solar collector is mounted on or near your home facing south. As the sunlight passes through the collector's glazing, it strikes an absorbing material. This material converts the sunlight into heat, and the glazing prevents the heat from escaping in a similar manner to leaving a car parked in the sun with its windows rolled up. The temperature inside a glazed solar collector on your roof can easily reach 150°C when there is no heat transfer fluid flowing through it.
The two most common types of solar collectors used in solar water heaters are glazed flat plate and evacuated tube collectors. A glazed flat plate collector consists of a shallow rectangular box with a transparent glass "window" covering a flat black plate. The black plate is attached to a series of parallel tubes or one serpentine tube through which air, water, or other heat transfer fluids pass.
An evacuated tube collector consists of several individual glass tubes, each containing a black metal pipe through which the heat transfer fluid passes. The space between the pipe and the glass tube is "evacuated," so the air is removed.
Although uncommon, unglazed plastic collectors can be used as a seasonal solar water heating system. However, they are used mostly for Pool Heating. Each collector has its advantages, and each can perform well if matched with the proper, well-designed, storage unit.
2. Energy Transfer: Circulating fluids transfer the collected energy in the form of heat to a storage tank.
Heat energy is transferred from the collector to the water storage tank. In some water heaters, hot fluid is pumped from the collector to the storage tank. The pump is powered by electricity that either comes from an electrical wall outlet or a small photovoltaic module located beside the collector.
In other types of solar water heaters, the sun heats the storage tank directly, so the fluid in the collector is heated and rises naturally to a storage tank above the collector. This type of solar water heater is often referred to as a thermosiphon system. It does not require an electric pump. Passive solar and solar photovoltaic-powered systems will continue to operate even if there is a power outage. The products that require electricity from a wall outlet will not operate during a power outage.
3. Energy Storage
Solar-heated water is stored in an insulated tank until you need it. Hot water is drawn off the tank when tap water is used, and cold make-up water enters at the bottom of the tank.
Solar water heaters tend to have a slightly larger hot water storage capacity than conventional water heaters. This is because solar heat is available only during the day and sufficient hot water must be collected to meet evening and morning requirements.
it depends on the whether when the solar power heaters work
Solar hot water heaters are becoming more popular as are many solar products. One can find solar water heaters on the Rheem or Velux websites as well as on Amazon.
i think that they would probably not work without the sun and in addition to this i dont think they would make us much heat as the other heaters eg convectional heaters
Solar heaters are useful for heating water with natural energy, thus saving electricity. The question is can effective solar heaters be made for less cost than using the electricity.
yes
Yes, they are well worth the cost.
Rheem provide a series of high efficiency gas water heaters. Several different companies also provide tank-less water heaters, which are very efficient, as well as solar water heaters.
To buy solar water heaters, one can go to one of the following companies: AET Solar, Alibaba, Heliodyne, and Solar Panel Plus. One might also be able to find some at home improvement stores.
Solar heaters are meant to heat the water for your house or in a pool, so you need water to heat it! The water runs through a system where it is put onto the roof of your house, for example, heated by the Sun and then stored or put into your pool.
solar water heaters have glass plates to receive sunlight to heat water.
Russell H. Plante has written: 'Solar domestic hot water' -- subject(s): Solar heating, Solar water heaters
If you switch to solar power heaters you earn a lot if money and you will be going green. Also if you switch you would save a lot of money in your energy bill and some money on water.