【Daily Question】Question from Issue 20150817
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Multiple-choice question: A climate compensator adjusts the heating supply from the thermal station in response to changes in outdoor temperature. A certain urban heating network operates on a constant flow basis; when the outdoor temperature is higher than the designed outdoor temperature, which of the following statements regarding the changes in the supply and return water temperatures as well as the temperature difference between them are not in line with the established patterns? ( ) (A) The supply water temperature drops, the return water temperature drops, and the temperature difference between supply and return water remains unchanged. (B) The supply water temperature drops, the return water temperature drops, and the temperature difference between supply and return water decreases. (C) The supply water temperature remains unchanged, the return water temperature drops, and the temperature difference between supply and return water decreases. (D) The supply water temperature drops, the return water temperature drops, and the temperature difference between supply and return water decreases. Answer: AC. New activities have started in the production area; the prizes are attractive, so hurry up and participate: 【Production in Summer】 – The production area has entered the “training during the hot summer days” mode
(A) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water remains unchanged. (C) Supply water temperature remains unchanged, return water temperature decreases, temperature difference between supply and return water decreases
Multiple-choice question: A climate compensator adjusts the heating supply from the thermal station in response to changes in outdoor temperature. A certain urban heating network operates on a constant flow basis; when the outdoor temperature is higher than the designed outdoor temperature, which of the following statements regarding the changes in the supply and return water temperatures as well as the temperature difference between them are not in line with the established patterns? (AC) (A) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water remains unchanged; (B) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water decreases; (C) Supply water temperature remains unchanged, return water temperature decreases, temperature difference between supply and return water decreases; (D) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water decreases
Answer: A, C. :hug::hug::hug:
A climate compensator adjusts the heating supply from the thermal station in response to changes in outdoor temperature. A certain urban heat network operates at a constant flow rate; when the outdoor temperature is higher than the designed value, which of the following variations in the supply and return water temperatures of the heat network, as well as in the temperature difference between them, do not follow a regular pattern? ((A) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water remains unchanged. (C) Supply water temperature remains unchanged, return water temperature decreases, temperature difference between supply and return water decreases.)
(A) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water remains unchanged. (C) Supply water temperature remains unchanged, return water temperature decreases, temperature difference between supply and return water decreases
Answer: AC Analysis: It is given that the heat network operates at a constant flow rate. According to G=Q/CpΔt, when the outdoor temperature is at the designed outdoor calculation temperature, G1=Q1/CpΔt1 ； When the outdoor temperature is higher than the designed outdoor calculation temperature, the system heat load Q2
A climate compensator adjusts the heating supply from the thermal station in response to changes in outdoor temperature. A certain urban heat network operates at a constant flow rate; when the outdoor temperature is higher than the designed value, which of the following variations in the supply and return water temperatures of the heat network, as well as in the temperature difference between them, do not follow a regular pattern? (AC) (A) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water remains unchanged; (B) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water decreases; (C) Supply water temperature remains unchanged, return water temperature decreases, temperature difference between supply and return water decreases; (D) Supply water temperature decreases, return water temperature decreases, temperature difference between supply and return water decreases
A climate compensator adjusts the heating supply from the thermal station in response to changes in outdoor temperature. A certain urban heat network operates at a constant flow rate; when the outdoor temperature is higher than the designed value, which of the following variations in the supply and return water temperatures of the heat network, as well as in the temperature difference between them, do not follow a regular pattern? (A C)