Product Description
The process of steam condensation that occurs in the convective heat exchange process of the heat exchanger unit is called phase change heat.
When the steam contacts the wall surface which is lower than the saturation temperature under the corresponding pressure, condensation will occur on the wall surface. At this time, the steam releases the latent heat of vaporization and condenses into liquid, and the condensate becomes a new thermal resistance. According to the different forms of steam condensation on the wall, it can be divided into film condensation (the condensate wets the wall very well) and bead condensation (the condensate adheres to the wall in the form of droplets). Membrane condensate forms a complete liquid film on the wall of the heat exchange unit, and the latent heat released during condensation needs to pass through the liquid film to transfer to the wall with a lower temperature; while bead condensation, the heat exchange is on the surface of steam and liquid beads It is carried out between the steam and the cold wall, so the heat transfer coefficient of film condensation is lower than that of bead condensation.
During heat exchange, the flow rate of steam has a significant effect on condensation heat transfer. When steam moves at a certain speed. There will be a certain force between the steam and the liquid film. When the steam and the liquid film flow in the same direction, the action of this force will make the liquid film thinner and cause the liquid film to fluctuate to a certain extent, thereby enhancing heat transfer. If the flow direction of the steam and the liquid film is opposite, the force will hinder the flow of the liquid film, thicken the liquid film and weaken the heat transfer. But when this force exceeds gravity, the liquid film will be driven away from the wall by the steam, which will increase the heat transfer coefficient instead.
The difference in the relative flow direction of the fluid in the heat exchange unit will also affect the condensation process. The temperature difference in the lower part of the channel is large in the case of countercurrent flow, and most of the condensation of steam occurs in the lower part of the channel, while the opposite is true in the case of downstream flow. In this way, the pressure drop of steam in countercurrent flow It is larger than that of downstream, and the corresponding saturation temperature drops more, which affects the condensation heat transfer effect.
Product Features
● High Heat Transfer Coefficient
● Less Heat Loss, High Evaporation Temperature
● Small Volume of Charge
● High Reliability
Q & A
1. Are you a reseller or OEM?
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We are an OEM. |
2. Do you have any certificate?
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Our products are CE&ISO approved. |
3. How about warranty?
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We provide one year warranty. |
Contact Us
mail: luna@tranp.cn
address: No.3 Waizi Factory, Xindun Village, Xintang Town, Zengcheng District, Guangzhou City, Guangdong Province, China
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