China solar water heater,solar collectorManufacturer-Zhejiang Eammar Solar Energy Co.,Ltd.
Solar water heater is water heated by the use of solar energy. Its systems are generally composed of solar thermal collectors, a water storage tank and so on.
Solar collector is designed to collect heat by absorbing sunlight. It is applie...

What is Delta T?

Delta-T refers to the difference in two temperatures. This term is often use in relation to a solar controller. In such case the Delta-T is the difference between the solar collector temperature and the temperature of the water in the solar storage tank. A Delta-T controller can be configured to turn on the pump when the Delta-T difference exceeds a certain level (Eg.7'C) and off again when the temperature difference drops below another setting (Eg. 2'C). The controller turns on the pump when there is heat potential in the manifold. A Delta-T controller can also be used to provide freeze protection by circulating warm water from the tank through the manifold when the manifold temperature drops below 5'C.
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