【Daily Topic】【HVAC Version 20160828】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. The total heat load of a certain hot water heating system is 630×10 kJ/h; a shell-and-tube steam-water heat exchanger and a condensate steam-water heat exchanger are installed in the steam boiler room to heat the water circulating in the system. The enthalpy of the boiler steam is 2763 kJ/kg, and the saturation steam temperature is 165°C. For the heat network design, the supply and return water temperatures are 95/70°C, and the efficiency of the heat exchanger is taken as 0.96; then the required steam consumption is ( ). A. 2375 kg/h B. 2595 kg/h C. 2703 kg/h D. 2816 kg/h
The total heat load of a certain hot water heating system is 630×10 kJ/h. A shell-and-tube steam-water heat exchanger and a condensate steam-water heat exchanger are installed in the steam boiler room to heat the circulating water in the network. The enthalpy of the boiler steam is 2763 kJ/kg, and the saturation steam temperature is 165°C. For the heat network design, the supply and return water temperatures are 95/70°C, and the efficiency of the heat exchanger is taken as 0.96; therefore, the required steam consumption is (C). A. 2375 kg/h B. 2595 kg/h C. 2703 kg/h D. 2816 kg/h