Spray-type heat exchanger
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A spray-type heat exchanger is a type of tubular heat exchanger in which the heat exchange tubes are fixed in rows on a steel frame; the hot fluid flows inside the tubes, while cooling water is evenly sprayed from a nozzle at the top, which is why it is also known as a spray-type cooler. Outside the tubes of a spray-type heat exchanger, there is a liquid film with a high degree of turbulence, resulting in a much higher external heat transfer coefficient compared to that of an immersed type heat exchanger. Furthermore, spray-type heat exchangers are usually placed in areas with good air circulation; the evaporation of cooling water also removes some heat, which helps to lower the temperature of the cooling water and increase the driving force for heat transfer. Compared to immersion heat exchangers, spray-type heat exchangers exhibit a significantly improved heat transfer performance. The advantages of spray-type heat exchangers are: ◆ Simple structure and low cost ； ◆ It can help reduce the temperature of the cooling water and increase the driving force for heat transfer ； ◆ Can handle high pressure ； ◆ It is easy to maintain and clean, and has low requirements regarding water quality. The disadvantages of spray-type heat exchangers are: ◆ Uneven cooling water spraying can affect the heat transfer efficiency ； ◆ It can only be installed outdoors.
There should be a fan blowing air upward on the evaporative cooler, right?
What the poster is referring to is likely an evaporative condenser; there should also be a fan at the top, and its energy consumption is higher than that of an immersion-type heat exchanger. Suitable for areas with limited water resources
They’re not talking about the same thing anymore. . .
The effectiveness of spray-type heat exchangers lies mainly in the latent heat of vaporization; in your case, there is no fan to remove the saturated steam, and once operation stabilizes, the heat exchange efficiency is not very good
You can search for closed-type cooling towers or evaporative condensers on Baidu
No need for Baidu. I’m familiar with evaporative condensers or evaporative air coolers; we have one of these here. It has a fan, and evaporative membranes are present on all four sides of it. A fan is needed, but this one uses spraying – water is sprayed from above. Go and check on Baidu to see which brand’s product also comes with a fan. . . .
The exposed strip-jet type heat exchanger has slow latent heat transfer due to the absence of a fan, and it needs to be used in conjunction with a cooling tower.