Trough and Fresnel type power generation systems use PTR tubes as heat collectors. The interior is a coated stainless steel tube and the exterior is glass. In China, it is called a power generation tube.
The heat collector of tower and dish power generation systems is a tower receiver, similar to a black body box.
There is also a type of fireplace, which has not yet been made. It uses a large number of mirror fields and absorbs heated air, and the air rises through a narrow chimney. Use the hot air flow to generate electricity.
Method 1: The system cannot support the pressure:
Opening system, this is the structure of most of our traditional vacuum tube solar cells. There is a pipe directly connected to the. atmosphere. When there is too much solar energy, that is, the solar energy exceeds 100°C, the water in the rWater tank “boils” and releases steam to dissipate heat.
Method 2: Use a T/P valve in a pressure system:
T/P valve, i.e. a temperature/pressure safety valve, the function of this valve is when the temperature exceeds or the pressure exceeds the setting. When a certain threshold value is reached, the valve opens. In a solar hot water system, the general threshold value is a temperature of 99 p>
℃ and a pressure of 0.6MPa. .
Currently, most pressurized solar water heater systems have this valve installed on the water tank as the primary means of preventing "overheating" of pressurized tube solar water heater systems. empty.
Method 3: Shading Measures:
When the system is in danger of overheating, remove artificial shading or passive automatic shading. Shading involves using a coating on the surface of the sensor to block light from below.leil in order to prevent the vacuum tube from continuing to absorb heat and prevent the solar water heating system from "overheating".
One of them is the artificial shading. unused for a long time, artificial measures are taken to block sunlight on the solar collector, which brings insecurity and problems to consumers.
Method 4: Improve the solar vacuum glass tube so that it has effective heat absorption performance in low temperature areas and poor heat absorption performance in high temperature areas. high temperature: