Solar thermal insulation barrel for heat preservation. The inner tank of the thermal insulation barrel of the solar water heater is basically made of stainless steel, and the middle one is not a vacuum, but insulation cotton. Current technology should not have reached the vacuum insulation barrel. In theory this should be possible. to vacuum the insulation barrel. Solar water heater is a device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's use of hot water in life and production.
Barrels are expensive. Solar vacuum tubes, solar water heaters. Vacuum tubes are the essential components of solar water heaters. The price is around 20 yuan per piece. The water storage tank is the main body of solar water heaters. -pressurized water tanks. The price of a solar barrel is approx.we 280 yuan, so the barrels are expensive.