【Weekly Topic】【HVAC Version 20160219】
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Which of the following statements is incorrect? ( ) A. In the hydraulic calculation of mechanical circulating water, the operating pressure of the most unfavorable loop should be calculated in order 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. 【Haichuan Thanksgiving】--Production Area 【Production and Management Area】is seeking moderators and technical discussants to join us
D 30～70 Pa/m.
D 30～70 Pa/m.
D. 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 incorrect statement among the following is (D). A. In the hydraulic calculation of mechanical circulating water, the operating pressure of the most unfavorable loop should be calculated in order to determine the average specific friction loss. B. The hydraulic calculation for indoor low-pressure steam heating systems is carried out based on a controlled 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
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 should be calculated in order to determine the average specific friction loss. B. The hydraulic calculation for indoor low-pressure steam heating systems is carried out based on a controlled 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
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 should be calculated in order to determine the average specific friction loss. B. The hydraulic calculation for indoor low-pressure steam heating systems is carried out based on a controlled 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
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 should be calculated in order to determine the average specific friction loss. B. The hydraulic calculation for indoor low-pressure steam heating systems is carried out based on a controlled 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