【Joint Study*】【HVAC Version 20160307】
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Which of the following statements is incorrect? Answer: D. In the hydraulic calculation of mechanical circulating water, the operating pressure of the most unfavorable loop is used to determine the average specific friction loss. The hydraulic calculation for indoor low-pressure steam heating systems is carried out with a target specific pressure drop of 100 Pa/m. The hydraulic calculation for indoor high-pressure steam heating systems is done using the recommended flow velocity method, with a recommended flow velocity of 30–40 m/s. According to the \"Code for Design of Urban Thermal Networks\", the average specific friction loss in the main pipelines of hot water networks can generally range from 40–80 Pa/m
In the hydraulic calculation of mechanical circulating water, the operating pressure of the most unfavorable loop is used to further calculate the average specific friction loss
According to the \"Code for Design of Urban Heat Networks\", under normal circumstances, the average specific friction loss for the main lines of hot water networks can range from 40 to 80 Pa/m
The hydraulic calculation for the low-pressure steam heating system in Room B is designed with a controlled pressure drop of 100 Pa/m
The incorrect statement among the following is (D). A. In the hydraulic calculation of mechanical circulating water, the operating pressure of the most unfavorable loop is used to determine the average specific friction loss. B. The hydraulic calculation for indoor low-pressure steam heating systems is carried out with a target specific pressure drop of 100 Pa/m. C. The hydraulic calculation for indoor high-pressure steam heating systems is done using the recommended flow velocity method, with a recommended flow velocity of 30–40 m/s. D. According to the \"Code for Design of Urban Thermal Networks\", the average specific friction loss for the main lines of hot water networks can generally range from 40–80 Pa/m