Seek answers to the problem of steam condensation fringes
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I would like to ask: when using a shell-and-tube heat exchanger to condense saturated steam in order to heat other fluids, what is an appropriate flow rate for the steam? Since it is for condensation, does the flow rate keep decreasing? I used HTRI to calculate a heat exchanger, and the calculation result showed a steam flow velocity of 0.2 m/s; this value cannot be increased any further. Is this acceptable? Is this flow rate accurate? Thank you for the answer. Hasn’t anyone encountered this problem?
What are the design temperature and design pressure? They affect the flow rate.
Type of fluid: General fluids, fluids prone to scaling, gases. Flow rate: m/s. Inside the pipe: 0.5–3.0, >1.0; 5.0–30. Outside the pipe: 0.2–1.5, >0.5; 3.0–15. Category, Pipe material, Minimum flow rate (m/s), Maximum flow rate (m/s): Condensate water, Steel pipe, 0.6–0.9, 3.0; River water (clean), Steel pipe, 0.6–0.9, 3.7
Oxygen is heated by the condensation of steam; water has a high latent heat, while oxygen does not require much heat. As a result, the amount of steam needed is very small. Therefore, the calculated steam flow rate is 0.2. I’m not sure whether this calculation is valid Correct
1. The heat balance dictates that more heat sources cannot be used, so a low flow rate of steam is necessary. 2. An effective way to adjust the flow rate is to use multiple tube passes, provided that the pressure drop across the tubes permits it.
The flow rate is now 0.2, and increasing the number of iterations doesn’t yield much improvement. I just don’t know whether the current calculation structure with 0.2 is feasible or not.