SOLAR WATER HEATER

Solar water heaters also called solar domestic hot water systems can be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel they use — sunshine — is free.. Solar hot water systems are composed of solar collectors, which collects energy from the sun. The heat collected is moved, through a fluid system, from the collectors to a storage tank and from there to the point of usage. The system may use electricity for pumping the fluid, or heat convection, depending on the type. The system may include also thermostats and a controller device to control the operation based on temperature differentials and hot water demand. In most cases a solar water heater can provide up to 85% of domestic hot water.

When choosing a solar system for hot water we must first determine our needs for hot quantity as well as in preferred temperature of consumption. The typical calculation for the temperature for consumption is 45ºC, but for the calculation of required quantity we must take into account the daily needs.