【Daily Topic】【HVAC Version 20151218】
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. In a six-story residential building in a cold climate area, the main piping system is designed as a dual-pipe arrangement with hot water supplied from below and returned from below in a non-parallel configuration; individual heat metering is installed in each unit, and a horizontal radiant heating system is used for heating. Manual control valves are installed on the inlet and outlet branches of each group of radiators, with the designed supply and return water temperatures set at 80°C/55°C. During the initial adjustment of the system as per the design, the room temperatures on each floor can meet the design requirements. When the hot water supply temperature in the building is 65°C, and the pressure difference between the supply and return water at the lower part of the main pipe is the same as that under design conditions, what should be the room temperature conditions on each floor (with no changes made to the control valves)? ( ) A. The room temperature on each floor meets the design requirements. B. The variation in room temperature on each floor relative to the design values is proportional. C. The room temperature on the sixth floor is higher than that on the first floor. D. The room temperature on the sixth floor is lower than that on the first floor. [Production and Management Division] Seeking moderators and technical discussants to join
In a six-story residential building in a cold climate area, the main piping system is designed as a dual-pipe arrangement with hot water supplied from below and returned from below in a non-parallel configuration; individual heat metering is installed in each unit, and a horizontal radiant heating system is used for heating. Manual control valves are installed on the inlet and outlet branches of each group of radiators, with the designed supply and return water temperatures set at 80°C/55°C. During the initial adjustment of the system as per the design, the room temperatures on each floor can meet the design requirements. When the hot water supply temperature in the building is 65°C, and the pressure difference between the supply and return water at the lower part of the main pipe is the same as that under design conditions, what should be the room temperature conditions on each floor (with no changes made to the control valves)? ( D )
In a six-story residential building in a cold climate area, the main piping system is designed as a dual-pipe arrangement with hot water supplied from below and returned from below in a non-parallel configuration; individual heat metering is installed in each unit, and a horizontal radiant heating system is used for heating. Manual control valves are installed on the inlet and outlet branches of each group of radiators, with the designed supply and return water temperatures set at 80°C/55°C. During the initial adjustment of the system as per the design, the room temperatures on each floor can meet the design requirements. When the hot water supply temperature in the building is 65°C, and the pressure difference between the supply and return water at the lower part of the main pipe is the same as that under design conditions, what should be the room temperature conditions on each floor (with no changes made to the control valves)? (D) A. The room temperature on each floor meets the design requirements. B. The variation in room temperature on each floor relative to the design values is proportional. C. The room temperature on the sixth floor is higher than that on the first floor. D. The room temperature on the sixth floor is lower than that on the first floor
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D: The room temperature on the sixth floor is lower than that on the first floor
D: The room temperature on the sixth floor is lower than that on the first floor
In a six-story residential building in a cold climate area, the main piping system is designed as a dual-pipe arrangement with hot water supplied from below and returned from below in a non-parallel configuration; individual heat metering is installed in each unit, and a horizontal radiant heating system is used for heating. Manual control valves are installed on the inlet and outlet branches of each group of radiators, with the designed supply and return water temperatures set at 80°C/55°C. During the initial adjustment of the system as per the design, the room temperatures on each floor can meet the design requirements. When the hot water supply temperature in the building is 65°C, and the pressure difference between the supply and return water at the lower part of the main pipe is the same as that under design conditions, what should be the room temperature conditions on each floor (with no changes made to the control valves)? (D) A. The room temperature on each floor meets the design requirements. B. The variation in room temperature on each floor relative to the design values is proportional. C. The room temperature on the sixth floor is higher than that on the first floor. D. The room temperature on the sixth floor is lower than that on the first floor
B. The variation in room temperature on each floor relative to the design conditions follows the same proportion
In a six-story residential building in a cold climate area, the main piping system is designed as a dual-pipe arrangement with hot water supplied from below and returned from below in a non-parallel configuration; individual heat metering is installed in each unit, and a horizontal radiant heating system is used for heating. Manual control valves are installed on the inlet and outlet branches of each group of radiators, with the designed supply and return water temperatures set at 80°C/55°C. During the initial adjustment of the system as per the design, the room temperatures on each floor can meet the design requirements. When the hot water supply temperature in the building is 65°C, and the pressure difference between the supply and return water at the lower part of the main pipe is the same as that under design conditions, what should be the room temperature conditions on each floor (with no changes made to the control valves)? (D) A. The room temperature on each floor meets the design requirements. B. The variation in room temperature on each floor relative to the design values is proportional. C. The room temperature on the sixth floor is higher than that on the first floor. D. The room temperature on the sixth floor is lower than that on the first floor