【Daily Question】Question from Issue 20150819
Thread Content
Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Which of the following statements is correct regarding the parameter monitoring and control of urban heat network systems? ( ) (A) The system accuracy of flow meters used for trade settlements between heating companies and heat source providers should be the same for both hot water flow meters and steam flow meters; it should not be lower than 1%. (B) The control signal used for regulating the speed of the circulation pump in heat source systems should be the pressure difference at the inlet and outlet of the pump. (C) It is preferable that the control signal used for regulating the speed of the circulation pump in heat source systems be the value of the most unfavorable head loss in the heating network. (D) The circulation pump should have an overpressure protection device only at its inlet. Answer: C. A new activity has started in the production area, with attractive prizes available – hurry up and participate: 【Producing Through Summer】The production area has entered the “training during the hottest days of summer” mode
B,-------------------------
(C) The control signal for the variable-speed circulation water pump of the heat source should preferably be the value of the most unfavorable head available in the heat network
Correct answer: -----C--------
Which of the following statements is correct regarding the parameter monitoring and control of urban heat network systems? (C)
(C) The control signal for the variable-speed circulation water pump of the heat source should preferably be the value of the most unfavorable head available in the heat network
(C) The control signal for the variable-speed circulation water pump of the heat source should preferably be the value of the most unfavorable head available in the heat network
Which of the following statements is correct regarding the parameter monitoring and control of urban heat network systems? (C) (A) The system accuracy of flow meters used for trade settlements between heating companies and heat source providers should be the same for hot water flow meters and steam flow meters; it must not be lower than 1%. (B) The control signal used for regulating the speed of the circulation pump in heat source systems should be the pressure difference at the inlet and outlet of the circulation pump. (C) It is advisable to use the value of the most unfavorable head loss in the heating network as the control signal for regulating the speed of the circulation pump in heat source systems. (D) Overpressure protection devices should be installed only at the inlet of the circulation pump