Discharge of thermosyphon systems

[bernard]

Hello,
Up until now I have seen the regular Solar water heating systems with storage tanks and circulation pumps.
Once the maximal temperature is reached (for example 93 degrees Celisus (200 F)) a discharge valve starts releasing the hot water, while new cold one is inserted into the storage tank.

I was wondering do Thermosyphon systems have these discharge valves too or not?
Most of the Thermosyphon storage tank models I have seen by googling, have around 4 pipes coming out: one for cold water supply; one taking the hot water to the consumers; And two pipes which send and receive the water to/from the collector. And that is it.
Do Thermosyphon storage tanks even have the discharge valves, for discharging the excess hot water?

Thank you.

[Naptown]

Yes they would
That is a tomperature pressure relief valve
How or what brand of controller are you using. Most today have high limit settings and cooling functions to keep this from happening. Cooling works with flat plates but not evacuated tube unless a heat dissipator is installed.

[bernard]

Thank you for the reply Naptown.

Actually I do not have any kind of controller nor thermosyphon system. I am just curious how do these discharge the excess hot water.

Where does the temperature/pressure relief valve send the excess hot water? It flows out from the relief valve to the roof beneath the storage tank? Do you have some screenshot of this please?

[SunEagle]

Thank you for the reply Naptown.

Actually I do not have any kind of controller nor thermosyphon system. I am just curious how do these discharge the excess hot water.

Where does the temperature/pressure relief valve send the excess hot water? It flows out from the relief valve to the roof beneath the storage tank? Do you have some screenshot of this please?

Most relief valves work to keep the pressure from building up too much.

When they open, usually the water falls down to whatever is below the valve which is probably the roof. If there is a safety issue due to that hot water hitting someone then some type of mitigation process (barriers or collection channels) would be installed to divert the water to a safe resting place.

[bernard]

Thank you SunEagle.
Do you happen to know what is the discharge temperature of those relief valves for thermosyphon storage tanks?
Around 200 Fahrenheit (93 degrees Celsius)?

[SunEagle]

Thank you SunEagle.
Do you happen to know what is the discharge temperature of those relief valves for thermosyphon storage tanks?
Around 200 Fahrenheit (93 degrees Celsius)?

Unfortunately I do not know the specs for those relief valves.

[bernard]

Thank you SunEagle.