As a part of my thesis I am designing Finned pack heat exchangers for cooling/condensing warm air with water. I am not getting the exact procedure for it. I am reffering multiple research papers but all seem to have different information. Does anyone know of a relevant literature where I can find the process.
The exact type of heat exchanger I want to design : http://www.deltacoils.it/?locale=it_IT
Actually my part is to check the efficiency of the preinstalled heat exchanger I thought by designing the heat exchanger I would get a better under the efficiency is this approach correct also please suggest as per your experience.
@Siddhanth Patil I prefer to start with simplified model using CFX or fluent model with pipes without fines, then add fins. good tutorial illustrated in the links
https://www.youtube.com/watch?v=PdT8IE5cjBw&ab_channel=Ansys%26SolidSolutions
https://www.youtube.com/watch?v=NPJImYibx48&ab_channel=XSCIENCEY
please follow the articles attached herewith
Article Finned-Tube Heat Exchanger Optimization Methodology
hopefully helps you a lot.
Dear Mr.Siddhanth Patil
Greeting
I'm not sure about the type of flow through the heat exchanger if it is single phase or two phase (change in phase). also you are talking about the thesis and that mean you need to study more than parameter in your simulation arriving to the optimum design
so I send to you many title of books and I hope to be useful to you, also I hope from you to search about the specialize papers and hand book to depended in you research.
Notes:
1- you not need characterizing catalog to select but to make a compeer with it.
2- depend in your design the optimum configuration for the circuits and the number of it.
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References
1- Heat Exchanger design hand book by. T.kuppan
2-Fundamental of heat exchanger design by. Ramesh K.Shah
fi you have change phase HE. you need to make a thermal analyses for heat and mass transfer and simulate the change in phase, at that time the best correlation for condensation or evaporation for Dr.M.M.Shah with high accuracy result.
I hope to success in your research.
with my respect
Dear MR. Siddhanth Patil
other references
- Compact heat exchangers by W.M. Kays and A.L. London
- Heating Ventilation abd air conditioning analysis and design by Faye. C McQuiston it is si useful if yoy have a two phase refrigerant flow inside the tube
I presume you are cooling moist air using a coolant (water) having a lower temperature than the moist air dew point temperature. Depending on the level of detail required, you may either
a) assume thorough mixing of the condensate formed and the air flow, i.e. assuming equilibrium condition, or
b) take into account the fact that moisture might be condensed 'independently' from the air cooling, i.e having non-equilibrium flow.
Case a) is the simplest, and the gas side heat transfer coefficient might be established using the method of Silver or Bell/Ghaly. Of course you will need to integrate along the heat exchanger, as the gas side heat transfer coefficient will tend to vary in the flow direction.
Case b) is more complex, however, any 'film model' (e.g. the model of Colburn/Hougen) can be applied. Note also that the heat transfer coefficient along the height of the fin might vary significantly (due to the vapor condensation rate), i.e. the traditional calculation of fin efficiency becomes void.
Case a) will most likely provide erratic air exit temperature and condensation rates, but for some mysterious reason the heat duty might not be that far off. Case b) will be more correct, and will most likely result in more condensate formed but less air cooling than case a). Which method ends up being correct will depend on the degree of mixing between the condensate and air.
As far as design methodology is concerned, it will be a trial-and error procedure, as all heat exchanger designs are.
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