I would like to ask further: for the safety valves on hot water system pipes, how is the discharge capacity of these safety valves calculated?
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:(RT, it seems that these commonly used estimation values these days can’t be backed up when actual calculations are carried out. Is it calculated based on the amount of expansion due to changes in water temperature?
I’ve already checked that, but I didn’t find any on the pipes; there’s none for hot water either :Q
Hot water is a liquid, and the calculation of the discharge volume W is based on the actual operating conditions. One is when the outlet valve is closed and the inlet valve is open; in this case, W is considered based on the inlet flow rate. One scenario involves hot water flowing through a heat exchanger or hot water pipes with a heat source; in this case, the condition of a rupture in the tubes of the heat exchanger, as well as the situation where the valves at the inlet and outlet of the pipes are closed during heating, are considered, with reference to HG/T20570.2-1995. One is the fire scenario of the hot water buffer tank; in the case of hot water pipelines, there is basically no need to consider the conditions of the storage tank.