Pressure in the tank

This pressurization method is primarily intended to ensure that there is sufficient pressure within the system to drive the circulation of steam or hot water, while preventing the condensation of steam due to temperature changes. During the heating process, if the pressure inside the tank is lower than the saturation pressure of water, then as the water temperature rises, the water will begin to boil and produce a large amount of steam. The generation of steam can lead to a rapid increase in pressure, thereby affecting the stability of the system. By maintaining the pressure value at least 0.2 MPa higher than the saturation pressure corresponding to the real-time water temperature, it is possible to effectively control the amount of steam in the system and prevent excessive steam generation and unstable fluctuations. Such pressure settings also help to maintain the energy and temperature of the steam, enabling more efficient heat transfer and preserving thermal efficiency. In summary, maintaining a pressure level higher than the saturation pressure is intended to ensure the safe and stable operation of the system, optimize thermal efficiency, and prevent issues such as steam condensation caused by insufficient pressure. .

This of yours doesn’t match the steam temperature and pressure chart

This post was last edited by Sun Rong on 2025-1-28 at 16:57. The original question read as follows: The air supply to the container is divided into two paths; one path is used to heat the water inside the container, while the other path uses the steam to apply pressure to the container. The approach is as follows: first, determine the saturated pressure value Psat corresponding to the real-time temperature of the water in the container plus 6 degrees; then, Psat plus 0.5 bar gives the pressure lag value Phys. The on-condition for this switch valve is met when the real-time pressure value of the container is…

Wouldn’t it be the same if the pressure is first raised to the set value, and then the water is heated to the saturation temperature at that pressure using high-temperature steam? ? Why apply pressure little by little? ?

The macro understanding is for reference only. The principle behind tube A for controlling water temperature is that the steam temperature is higher than that of the water; the water cools the steam, causing its volume to decrease by about 800 times. As a result, the pressure increase inside the tank is minimal and can be ignored. The steam in tube b is not cooled by water, so its volume remains constant, which can increase the pressure inside the tank. For reference.

In tube A, steam is introduced directly into the water; during this heating process, the water comes into contact with the steam and becomes superheated rapidly, turning into steam and causing an explosion. Meanwhile, when steam comes into contact with water, it cools down rapidly and liquefies, resulting in annihilation. In the above two cases, the heating method that involves introducing steam directly into water is usually accompanied by a rumbling sound and vibrations in the equipment’s pipes. Pressurizing via tube B can significantly reduce the occurrence of the aforementioned vibrations. .

But once the temperature of the water in the container reaches 157 degrees and the operating pressure is attained, there is no longer a need to use pipe B to apply pressure; instead, it is the temperature of the water heated by pipe A that matters. In that case, will there be no vibrations?

It’s impossible to have no vibration at all, but detonation will occur very rarely.

The term “annihilation” is completely unnecessary……