The principle of vacuum tube solar water heater
Vacuum tube solar water heaters are devices which utilize the solar energy to heat the water from cold to hot, so they are solar products. Vacuum tube solar water heaters are made up of all-glass evacuated solar collector tubes which have function to change the solar energy to heat energy, storage water tank, stand and interrelated accessories. It is well-known that the temperature of the surface facing sun is high, while the other surface is low. So that water in the tubes has different temperature, and the warmer water rises while colder water sinks which leads to circulation and at last the needed hot water produced.
The Vacuum tube solar water heaters are one of large industries depending on the application solar energy. They supply pro-environment, energy-saving, safe and sanitary new water heaters for common people; solar water heaters are energy-saving equipments which absorb the radiant heat energy of sun, heater the cold water for people in daily life and production.
◆ Vacuum tube
Vacuum tube is the collecting energy Component in the system which has the same function as electric tube in electric water heater. But the difference between solar water heater and electric water heater and gas water heater is that the solar water heater absorbs the radiant heat energy of sun, therefore, the time of heating must be in the sun shining day.
Insulating water tank
Insulating water tanks of solar water heaters are the same as those of electric water heaters in storage of water. we know the solar water heaters work at daytime, while people usually use the hot water at night, so the hot water produced in daytime must be stored by insulating water tanks. The capacity of the tank is the sum of the volume water people should use at night. The Insulating water tanks of solar water heaters are good at heat preservation, corrosion-resistant, anti-pollution and has long service life as above 15 years
The material of stand is the thickening and widening galvanized steel sheet. The stand is beautiful in appearance, high in strength, and is bolt joined, besides, it is convenient to transport and install .what’s more, it has strong ability of wind and corrosion resistance
The work principle of vacuum tube solar water heater:
heat absorption→microcirculation→Insulating water tank→control system→user
Vacuum tube solar water heater utilizes the vacuum tube collectors to absorb heat, realizing the maximum exchange from light to heat., and then deliveries the hot water to insulating water tank via microcirculation, at last to the user by specialized pipeline. Control system automatically controls the water to deliver to tank by control valve and controller. The auxiliary electric booster installed in the tank is automatically used in cloudy, rainy, and snowy weather, so it can save 90% energy
Function of environmental protection
Every square meter of flat solar collector can produce so much heat equal to 2.5 degree electric energy on average in a normal sunshine day. And it can save about 250 kilos of standard coal every year and reduce more than 700 kilos of CO2 . the wide use of solar water heater, including hot water in life and heating system, will save a lot of money as the same time must immensely improve the condition of global pollution