A process calculation problem for a steam generator
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I need to build a steam generator now, but I don’t know how to do the calculations. Could someone help me with that? I am extremely grateful! The specific parameters are as follows: The medium used is heat transfer oil, the pressure is 0.7 Mpa, the inlet temperature is 170 degrees, and the outlet temperature is 155 degrees ； Shell side: The inlet is water, and the outlet is steam. The inlet temperature is 50 degrees, while the outlet should produce steam at a pressure of 0.3 Mpa. I’ve checked that the saturated steam pressure at 0.3 Mpa is 143 degrees, so the outlet temperature should be 143 degrees. Additionally, the power output of the steam at the outlet is required to be 230 KW. Now I want to determine the heat exchange area of the heat exchanger; I estimated it to be 25 square meters, but I think that’s incorrect. Could someone please help me verify this value? A U-tube heat exchanger is planned to be used, with a vertical installation arrangement.
Vertical types aren’t very good; there may not be enough space at the top of the shell side to accommodate steam outlets. All the steam generators we work with are horizontal type. We are currently producing one such generator, which has as many as 8 outlets. If it were vertical, then the entire top area of the shell side would be occupied by connections. If there are space constraints, we’ll talk about it then. I didn’t calculate your steam volume; I just expressed some empirical insights based on inertia. You can take a look if it’s useful to you.
I mean, what is the key heat exchange area?