Several questions about compressed water vapor
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This post was last edited by liuhui2015 on 2015-6-23 at 15:43. 1. The company’s new chief engineer has raised the question of whether it is possible to use a compressor (of any type) to directly compress superheated steam at 45°C and 0.00738 Mpa (with a saturation temperature of 40°C) to 0.27 Mpa (with a saturation temperature of 130°C). After checking, the final compression temperature is approximately 513°C. I would like to ask the experts: is such compression feasible? 2. Why are there no compressors for compressing water vapor? What is the scientific explanation? Is it a problem related to vacuum at low pressures, or is it related to the compressor’s capacity to handle high temperatures? Thank you!
Provide a medium; compressors are usually centrifugal or reciprocating； Single-stage, multi-stage
I’m an amateur; just sharing some casual thoughts. Simply heating the boiler water will increase the steam pressure; so why use a compressor that is complex and difficult to maintain?
It’s not economical. It’s simpler to use a boiler to convert the chemical energy of coal into the internal energy of steam. If you want to use a compressor, then you need to do some calculations. In a power plant, the chemical energy of coal is first converted into the internal energy of steam, which is then converted into the kinetic energy of turbines. The kinetic energy of the turbines is further converted into electrical energy by generators. The power plant supplies this electricity to you, who then converts it into kinetic energy for the compressor, and that kinetic energy is used to produce steam. Calculate the number of steps, the efficiency level, the degree of loss, and the amount of investment required.
Is it used for MVR? For MVR, depending on the operating conditions, fans, Roots blowers, or compressors are chosen to compress steam. If both the intake and exhaust are at superheated states, and as long as the temperature and pressure fall within the compressor’s operating range, there is no problem in using a compressor to compress the steam. Generally, a compressor isn’t necessary; this is because condensate may form in between, which could cause damage to the compressor due to compression with liquid present. I haven’t verified your final temperature; I’m just basing this on the final temperature you mentioned. The problem in your operating conditions is that the final temperature is too high, and no compressor can operate under such conditions
Superheated steam at 45°C and 0.00738 Mpa (saturation temperature of 40°C) is directly compressed to 0.27 Mpa (saturation temperature of 130°C). Are these two pressures gauge pressures or absolute pressures?
Hehe, I’ve never installed a steam compressor. Firstly, it is not economical; steam heating already results in high temperatures and pressures, so there’s no need to use mechanical equipment for that purpose. Secondly, even when using a compressor, you must ensure that its components are at high temperatures; otherwise, the steam will condense, the pressure will drop, and water hammer will affect the cylinders