Calculation of finned tube heat exchangers (sheet-type)
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Heat flow: Air. Inlet temperature: 120°C; Outlet temperature: 40°C. Flow rate: 18,500 NM3/h. Pressure: 0.6 MPa; Pressure drop: 0.1 MPa. Cold fluid: Water. Inlet temperature: 32°C; Outlet temperature: 40°C. Pressure: 0.4 MPa; Pressure drop: 0.1 MPa. Requirement: Shell-and-tube heat exchanger； Lens set type ； I want to know: What software is used? Is manual calculation employed?
I have built many rear coolers for this type of air compressor. For property simulation, the conventional ASPEN method can be used for design, as well as methods like HTRI for shell-and-tube designs. More detailed requirements are needed for the coil assemblies, and some companies develop their own programming for such designs. For heat exchange between such gases and liquids, there is a significant difference in the heat transfer coefficients on both sides. Additionally, considering the air operating pressure, internal finned heat exchangers (which belong to the shell-and-tube type) are suitable for this purpose; they have many advantages. However, the gas pressure drop you mentioned is a problem – it’s not acceptable to allow a pressure drop that results in an energy loss of 1/6 in one device. The maximum allowable pressure drop is probably around 0.003 MPa (the pressure drop in shell-and-tube exchangers is much higher). If you’re interested, check out the forum link: http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=163192&highlight=%D6%B5%B5%C I can suggest a design for an internal finned air cooler; contact information is available via site messaging.
I’m sorry, the pressure drop is 0.01 MPa
HTRI: If it has physical properties, I can take care of it for you.