Energy Efficient Steam Systems

Mwater = Q / (cp x dt) = 1,000,000 Btu/hr / (1 Btu/lb-F x 100 F) = 10,000 lb/hr. If the temperature of hot air dropped by 100 F as it passed through a heat exchanger, the mass flow rate of air to transfer the same amount of heat with the same temperature difference would be about 34 times as much as steam: ................
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