I was wondering if somebody could clarify to me how is maximal working temperature of solar hot water system defined?
On a couple of places on the web I found that one of reasons to use this limit is to prevent the water reaching the boiling point (100 in Celsius, 212 in Fahrenheit). So you limit the tank maximal water temperature to 95 degrees (203F). Of course if water is the heat transfer fluid.
But I also found that some solar hot water systems have maximal working temperature as low as 49 C (120F). What determines the exact shw maximal working temperature?
Type of heat transfer fluid used? Quality of the pipes, tank? Is there some table which shows this?
Thank you for the reply.
On a couple of places on the web I found that one of reasons to use this limit is to prevent the water reaching the boiling point (100 in Celsius, 212 in Fahrenheit). So you limit the tank maximal water temperature to 95 degrees (203F). Of course if water is the heat transfer fluid.
But I also found that some solar hot water systems have maximal working temperature as low as 49 C (120F). What determines the exact shw maximal working temperature?
Type of heat transfer fluid used? Quality of the pipes, tank? Is there some table which shows this?
Thank you for the reply.
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