【Daily Question】Utilities - HVAC - 20190219
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For a directly connected hot water heating system equipped with mixed water pumps, if the designed supply and return water temperatures for the network are 130/70°C, and the designed supply and return water temperatures for the heating users are 95/70°C, with a network flow rate of 100 t/h to meet the design heat load, then the amount of return water drawn from the secondary network is (). A. 42t/h B. 58t/h C. 140t/h D. 240t/h Answer: C
For a directly connected hot water heating system equipped with mixed water pumps, if the designed supply and return water temperatures for the network are 130/70°C, and the designed supply and return water temperatures for the heating users are 95/70°C, with a network flow rate of 100 t/h to meet the design heat load, then the amount of return water drawn from the secondary network is (). C．140t/h