Heat exchanger issues
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This post was last edited by lib0504 on 2016-5-3 10:52. The heat exchange process involves both sensible heat and latent heat – is it possible to achieve this in the same heat exchanger? If design is based on sensible heat exchange, would the efficiency of utilizing latent heat be lower? Here are the data: Hot side – 23,300, temperature range of 130~54°C, 10% moisture content, dew point at 55°C. Cold side – 42,000, temperature range of 10~53°C. Will condensation occur under these conditions? ? I’m not sure what software everyone uses. I downloaded Heat Exchanger Master before, and it indicated that the two sides cannot both be filled with gas at the same time. . . I don’t know what’s going on. . ==================================================5.3 Update: Thank you all for your responses. The hot side consists of ordinary flue gas, while the cold side is air; it’s just that the dew point temperature of the flue gas isn’t very high. Using cold air to cool and condense it may not yield good results. By the time the hot side reaches the condensation temperature, the temperature on the cold side is also pretty close to that level. . . So I’m worried that no condensate water will come out
Only heat exchangers where phase changes occur possess latent heat and sensible heat; this is the case with steam heating. In such situations, it is essentially the latent heat that is utilized, as saturated water is produced as a result. The amount of heat associated with latent heat is much greater than that of sensible heat, so there is no need for it. Moreover, if the water is not removed in time, it affects the heat exchange process
During the heat exchange process, the condenser involves both sensible heat and latent heat
First of all, if you don’t know what it is, it’s definitely impossible to determine whether latent heat has been released； There are many heat exchanger design software programs: Aspen HTRI and others can be used for this purpose
It depends on the medium involved; generally, when both are present, latent heat plays a dominant role, as its magnitude is much larger.