Thermal Performance Modeling of Cross-Flow Heat Exchangers - download pdf or read online

By Luben Cabezas-Gómez, Hélio Aparecido Navarro, José Maria Saíz-Jabardo

ISBN-10: 3319096702

ISBN-13: 9783319096704

ISBN-10: 3319096710

ISBN-13: 9783319096711

This monograph introduces a numerical computational technique for thermal functionality modeling of cross-flow warmth exchangers, with functions in chemical, refrigeration and car industries. this technique permits acquiring effectiveness-number of move devices (e-NTU) information and has been used for simulating a number of ordinary and complicated circulation preparations configurations of cross-flow warmth exchangers. Simulated effects were confirmed via comparisons with effects from on hand targeted and approximate analytical recommendations. Very exact effects were received over vast levels of NTU and C* values in all circumstances. The proposed approach constitutes an invaluable examine device for either theoretical and experimental reports of cross-flow warmth exchangers.

The following are the original good points of the book:

- The monograph contains the computational code named HETE (Heat Exchanger Thermal Effectiveness) in bankruptcy five. A model of this code is obtainable for downloading.

- The computational process may be used for decreasing experimental information utilizing the effectiveness - NTU (e-NTU) approach in learn and business laboratories.

- Even after a couple of century in warmth exchanger examine, the quest for brand new circulate preparations with better effectiveness nonetheless is an unsolved challenge. the current technique can be a great tool in pursuing that goal.

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Extra info for Thermal Performance Modeling of Cross-Flow Heat Exchangers

Example text

This means that in the case of this flow arrangement as well as in other multi-pass parallel-cross-flow arrangements the iterative procedure is not required. In fact, these configurations can be treated either by hand, for a relatively small number of elements, or through a spreadsheet. 9, and others show a different temperature distribution. In these cases the procedure of the HETE code is required. 8. Except for the first element, in all the downstream elements, the inlet temperatures of the elements are equal to the exit temperatures of the upstream ones.

Then the user enters the values of the thermal input parameters in the main program: NTU, C* and Cmin = (Cc or Ch ). The following variables are set by default in the program: Tc,i, Th,i, and UA. 4. 5, is called to compute the heat exchanger effectiveness. The last operation in the main program is the print out of the computed effectiveness. 5. After reading all the necessary input data, the parameters UAe, Cec, and Ceh are computed for a single element.  5. 2); the number of elements, Ne, should be chosen to satisfy this condition, Navarro and Cabezas-Gómez (2005); and Cabezas-Gómez et al.

9 receives the cold fluid from the outlet of the element located in the tube upstream in the cold fluid flow direction. 9, where the 15 and 16 elements, located in the fourth tube row, receive cold fluid respectively from the elements 18 and 17. Upon concluding iteration, the convergence criterion is applied involving the average temperature of the cold fluid. The error between iterations diminishes with the number of iterations. The computation process is stopped when the required error, δp, is attained.

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Thermal Performance Modeling of Cross-Flow Heat Exchangers by Luben Cabezas-Gómez, Hélio Aparecido Navarro, José Maria Saíz-Jabardo


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