【Weekly Topic】【HVAC Version 20160624】
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Which of the following statements about the air-conditioning water system is correct? A. Under the same conditions for the water pump, the resistance in cold water operation is lower than that in hot water operation. For constant-speed pump systems, closing the two-way valve on the fan coil unit has little effect on reducing energy consumption in the water system. C. An air-conditioning water system with an expansion tank is an open system. D. The make-up water pressure should be 20 KPa higher than the static pressure at the make-up water point. 【Production and Management Division】Calling for moderators and technical discussants to join; Announcement on the launch of the “I’m Saving Energy, Where Are You?” event in the Petrochemical Sector
Regarding the description of the air-conditioning water system, the correct option is (B). A. Under the same conditions for the water pump, the resistance in cold water operation is lower than that in hot water operation. For constant-speed pump systems, closing the two-way valve on the fan coil unit has little effect on reducing energy consumption in the water system. C. An air-conditioning water system with an expansion tank is an open system. D. The make-up water pressure should be 20 KPa higher than the static pressure at the make-up water point.
Regarding the description of the air-conditioning water system, the correct option is (a).
B 、、、、、、、、、
For constant-speed pump systems, closing the two-way valve on the fan coil unit has little effect on reducing energy consumption in the water system
D. The make-up water pressure should be 20 KPa higher than the static pressure at the make-up water point.
Regarding the description of the air-conditioning water system, the correct option is (C).
Regarding the description of the air-conditioning water system, the correct option is (B). A. Under the same conditions for the water pump, the resistance in cold water operation is lower than that in hot water operation. For constant-speed pump systems, closing the two-way valve on the fan coil unit has little effect on reducing energy consumption in the water system. C. An air-conditioning water system with an expansion tank is an open system. D. The make-up water pressure should be 20 KPa higher than the static pressure at the make-up water point.