1000 6000 W/ (m 2 °C) [176-1057 Btu/ (hr-ft 2 °F)] for hot water, and. 6000 15000 W/ (m 2 °C) [1057 - 2641 Btu/ (hr-ft 2 °F)] for steam. In a heat exchanger, however, the heat transfer process cannot be summarized by the convective heat transfer coefficient alone since heat transfer occurs through several mediums.
Aug 25, 2017 · For example, consider the quantities of air, hot water and steam required to transfer 1,000,000 Btu/hr of heat to a process. STEAM:If 100 psig steam were condensed in a heat exchanger, the mass flow rate of steam required to transfer 1,000,000Btu/hr of heat would be about:Msteam = Q / hfg = 1,000,000 Btu/hr / 881 Btu/lb = 1,135 lb/hr. HOT WATER:If the temperature of hot water dropped by 100º F as it passed through a heat exchanger, Steam Consumption of Heat Exchangers Spirax SarcoWhere condensing steam is used as the heating medium, the heat exchanger is usually horizontal with condensation taking place inside the tubes. Sub-cooling may also be used as a means to recover some extra heat from the condensate in the heat exchanger.
Recommended to you based on what's popular Feedback Pros and Cons of Using Water and Steam as a Heating Jan 30, 2017 · Steam is used as a heating medium in heat exchangers. Pressure steam is classified as low pressure steam and high pressure steam. Low pressure (LP) steam carries more latent heat, is normally of higher quality, reduces scaling, and reduces the fouling factor. LP steam typically requires pressure reducing values, which require more space and require large pipes for condensation.
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