Although people often rely on solar energy to power buildings, many people give up using solar water heaters to provide hot water for their businesses. These very simple devices are cost-effective to install and are a great way to help reduce energy costs. Hot water supply can become a problem, especially on cloudy days or at night. Next, let's take a look at how solar water heaters work and how they work when there is little or no sunlight.
How does solar water heater work?
Solar water heater is a very basic system. The first necessary component is a solar collector, usually a solar panel, usually placed on the roof of a building. The role of the collector is to collect sunlight and convert it into usable energy. This energy will be used to heat water.
Next, a large, well-insulated water storage tank is needed to hold the hot water. These tanks are quite large, usually about 80 gallons. There is a special pump in the water tank to help circulate the water. The water is reheated from the bottom of the tank through the collector, and then returned to the tank to produce usable hot water.
Finally, solar water heaters require solar controllers. This device helps to monitor the temperature in the water tank and trigger the pump to turn on when hot water is needed. The core of the solar water heater is a very simple system.
Does the solar water heater work at night?
Most solar water heaters have an additional backup device. Usually, this is a traditional water heater driven by electric or gas. The purpose of the standby unit is not to produce hot water, but to simply replenish the amount of hot water.
Only when enough solar energy is not collected for a day or the water in the solar water tank is not hot enough, the spare hot water tank will be turned on. Sometimes, at night, the backup device will be temporarily turned on to provide hot water. It is important to remember that the backup device is only used to supplement heat, so the energy cost of the backup device is the lowest.