Regarding the issue of steam production~
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I have a question for everyone: regarding steam production, I wonder if the amount of steam generated is related to the water volume and temperature. I would like to ask everyone, what if the water supply volume is fixed? How much more steam is produced when the temperature rises by 1°C? What is the relationship between steam production and temperature for saturated steam at 3.8 MPa? Waiting for an expert to answer; it’s urgent~
If the water supply volume remains constant, then the main steam flow rate will also be constant. The temperature depends only on the arrangement of the heat exchange surfaces, the fuel, and the furnace
Reply to 1# caoyujiancs: Steam flow rate is usually expressed in terms of mass flow rate, rather than volume flow rate. The unit is t/h; the instrument’s measurement is automatically calculated based on volume and the density at different pressure levels (the specific settings are outlined in the manual). According to the law of conservation of mass, one ton of water produces one ton of steam. The amount of water supplied minus the amount of water discharged equals the steam output.
This post was last edited by Bagua Lu on 2011-3-22 at 14:34. Are you asking about the changes in steam production caused by temperature? Let me tell you then that the change in evaporation rate caused by a 1-degree temperature difference is virtually negligible. First, the latent heat of vaporization of water is much greater than the sensible heat associated with a 1-degree temperature increase. Second, the measurement errors of industrial thermometers are not likely to result in a difference of 1 degree, and the errors of flow meters are even greater. Besides, you are producing steam at 3.8 MPa.
Reply to 4# Bagua Furnace: It’s like this – it’s not just once; I just want to know that the hot side temperature of my waste heat boiler has dropped by over 100°C. So how much steam loss will there be at my gas generation end?
Assume that for every 100-degree drop, steam production decreases by about 1/6.
Also, the masters might have misunderstood; it’s actually like this. The steam generation equipment in my workshop uses heat exchange to provide heat, with process gas as the medium. What I want to ask is that the process gas temperature has dropped by over 100°C. The water temperature at the steam-producing end will definitely drop. To keep the steam generator drum at a certain liquid level, the amount of water supplied must be reduced. What I want to ask is how much less steam will be produced when the process temperature drops by over 100 degrees. Perhaps the previous question wasn’t very precise.
Reply to 7# caoyujiancs: Your explanation still doesn’t make the conditions clear; the parameters of the steam are needed in order to carry out calculations. The simplest way is to call the heat exchanger manufacturer and ask them. Since the steam parameters have changed, it’s necessary to determine how to adjust the water flow
Reply to 8# martiantree: The steam parameters remain unchanged; it is still saturated steam at 3.8 MPa. If the steam parameters changed, there would be no point in making any comparisons~~
Reply to 6# Bagua Furnace: Thank you. What is the basis for this? I hope a basis can be provided. Thank you~~
Reply to 10# caoyujiancs: That answer is no longer what you need. I can’t provide the answer you’re looking for, as you don’t have information on the pressure, flow rate, normal temperature, and composition of the process gas, nor is there any data on the normal evaporation rate of water; therefore, it’s impossible to make such calculations. In a situation like this, you just need to observe the process to draw a conclusion.