Influence factors of the temperature of the refrigerant liquid boiling heat transfer

refrigerant believe that everybody is not strange, everywhere in our life can be used to, such as air conditioning, every family all have, but you don't have a full understanding to its, today small make up to you to introduce factors affecting liquid refrigerant boiling heat transfer of the influence of temperature, want to know friends following the introduction of small make up have a look at the following article.

in the process of refrigerant liquid boiling evaporator on the heat transfer surface per unit time the more the number of bubbles generated, the boiling heat transfer coefficient is larger. The number of bubbles per unit time is generated, and the heat transfer surface bubbles generated to leave the length of time, the shorter time, the more the number per unit time to generate bubbles. In addition, the smaller the diameter of the left wall if bubbles, the bubbles from generation to leave the time will be shorter.

bubble left wall, its diameter is the size of the bubble buoyancy and the balance of the liquid surface tension. Buoyancy force bubbles left wall, and the liquid surface tension to prevent bubbles away. Bubble buoyancy and liquid surface tension and density difference (under the saturation temperature was The density difference between the liquid and vapor) The influence of. The buoyancy of air bubbles and is directly proportional to the density difference. The surface tension of the liquid in the direct ratio with the density difference of four times.

so, along with the increase of density difference, increasing speed, the surface tension of liquid is much bigger than bubble buoyancy increasing speed, the bubble can only rely on the expansion of the volume to maintain balance, so the diameter of the bubbles left wall. The size of the density difference related to boiling temperature, the higher the boiling temperature, the smaller the density difference between the saturated temperature, evaporation process will be more quickly, heat transfer coefficient is bigger.

more about each of the refrigerant is over here, hoping to bring some help to you, it shows in the same evaporator, using the same kind of refrigerant, the heat transfer coefficient increased with boiling temperatures.

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