The calculation results for plate heat exchangers vary
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For a 400KW plate heat exchanger, with water temperatures of 85/75 or 75/65, I asked two manufacturers to do the calculations; one estimated a capacity of 20 square meters while the other estimated 10 square meters. Could someone expert help with these calculations? My own calculations also suggest that 10 square units should be sufficient; I’m too hesitant to buy the components and assemble the system if I’m not sure
It depends on your heat transfer coefficient; if K is 4000, then 10 square meters will be sufficient
I can’t just pick 4000 as the K value for plate heat exchangers when doing calculations, right?
This post was last edited by gn_1984 on 2015-11-5 at 10:50. Number: XXXXXX – Selection and Design Technical Parameters Table. Customer: Selection: WY60M-41HL. Project: 400KW. Date: 2015-11-05. _________________________________________________________________________ Hot side / Cold side. Fluid: Water. Density: kg/m3 – 971.5 / 977.1. Specific heat capacity: kJ/(kg·K) – 4.18 / 4.18. Thermal conductivity: W/(m·K) – 0.670 / 0.662. Viscosity at inlet: cP – 0.333 / 0.432. Viscosity at outlet: cP – 0.377 / 0.377. Volume flow rate: m3/h – 35.5 / 35.2. Inlet temperature: °C – 85.0 / 65.0. Outlet temperature: °C – 75.0 / 75.0. Pressure drop: kPa – 48.6 / 48.5. Heat exchanged: kW – 400.0. Log mean temperature difference (L.M.T.D.): K – 10.0. Design heat transfer coefficient under clean conditions: W/(m2·K) – 8771. Heat transfer coefficient during operation under normal conditions: W/(m2·K) – 7304. Heat transfer area: m2 – 5.5. Fouling resistance*: 10000 m2·K/W – 0.23. Design margin: % – 20.1. Relative direction of fluids: Countercurrent. Number of plates: 41; Effective plates: 39. Number of passes: 1. Maximum number of additional plates that can be installed: 16. Plate material/thickness: ALLOY 304 / 0.50 mm. Sealing material: NBRB CLIP-ON. Connection material: Unlined. Connection diameter: See drawing. Nozzle orientation: D1 -> D2 D4
How about you send it to my email address and I’ll help you calculate it: 3225774384@qq. com
I am a professional manufacturer; you can send me an email and I’ll help you calculate it: 1035366037@qq.com
It’s a very simple heat transfer calculation – 10㎡ is sufficient; the logarithmic temperature difference is 10, and the heat transfer coefficient is above 4000