【Daily Question】Question from Issue 20151021

B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A multi-story office building uses a hot water heating system with double pipes, where heat is supplied from above and returned below; radiators are used in this system, and no temperature control valves are installed on the branch pipes. The system operates properly under design conditions. When the supply flow rate and return water temperature remain constant, which of the following statements regarding the occurrence of vertical imbalance is correct? (D) (A). An increase in the temperature difference between the hot water supply and return temperatures results in the room temperature on the lower floor being higher than that on the upper floor. (B) An increase in the temperature difference between the hot water supply and return temperatures results in the room temperature on the upper floor being higher than that on the lower floor. (C) A decrease in the temperature difference between the hot water supply and return temperatures results in the room temperature on the lower floor being lower than that on the upper floor. (D) Changes in the temperature difference between the hot water supply and return temperatures do not cause vertical temperature imbalances

(B) As the temperature difference between hot water supply and return water increases, the room temperature on the top floor will be higher than that on the bottom floor

(D). Changes in the temperature difference between hot water supply and return water do not cause vertical misalignment

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A multi-story office building uses a hot water heating system with double pipes, where heat is supplied from above and returned below; radiators are used in this system, and no temperature control valves are installed on the branch pipes. The system operates properly under design conditions. When the supply flow rate and return water temperature remain constant, which of the following statements regarding the occurrence of vertical imbalance is correct? (a) (A). An increase in the temperature difference between the hot water supply and return temperatures results in the room temperature on the lower floor being higher than that on the upper floor. (B) An increase in this temperature difference causes the room temperature on the upper floor to be higher than that on the lower floor. (C) A decrease in this temperature difference leads to the room temperature on the lower floor being lower than that on the upper floor. (D) Changes in the temperature difference between the hot water supply and return temperatures do not cause any vertical temperature imbalances

A multi-story office building uses a hot water heating system with double pipes, where heat is supplied from above and returned below; radiators are used in this system, and no temperature control valves are installed on the branch pipes. The system operates properly under design conditions. When the supply flow rate and return water temperature remain constant, which of the following statements regarding the occurrence of vertical imbalance is correct? (D) (A). An increase in the temperature difference between the hot water supply and return temperatures results in the room temperature on the lower floor being higher than that on the upper floor. (B) An increase in the temperature difference between the hot water supply and return temperatures results in the room temperature on the upper floor being higher than that on the lower floor. (C) A decrease in the temperature difference between the hot water supply and return temperatures results in the room temperature on the lower floor being lower than that on the upper floor. (D) Changes in the temperature difference between the hot water supply and return temperatures do not cause vertical temperature imbalances

A multi-story office building uses a hot water heating system with double pipes, where heat is supplied from above and returned below; radiators are used in this system, and no temperature control valves are installed on the branch pipes. The system operates properly under design conditions. When the supply flow rate and return water temperature remain constant, which of the following statements regarding the occurrence of vertical imbalance is correct? (B) An increase in the temperature difference between the hot water supply and return temperatures results in a higher room temperature on the upper floors compared to the lower floors. (A) An increase in the temperature difference between the hot water supply and return temperatures results in a higher room temperature on the lower floors compared to the upper floors. (B) An increase in the temperature difference between the hot water supply and return temperatures results in a higher room temperature on the upper floors compared to the lower floors. (C) A decrease in the temperature difference between the hot water supply and return temperatures results in a lower room temperature on the lower floors compared to the upper floors. (D) Changes in the temperature difference between the hot water supply and return temperatures do not cause any vertical temperature imbalances