Download Thermal Performance Modeling of Cross-Flow Heat Exchangers by Luben Cabezas-Gómez, Hélio Aparecido Navarro, José Maria PDF
By Luben Cabezas-Gómez, Hélio Aparecido Navarro, José Maria Saíz-Jabardo
This monograph introduces a numerical computational technique for thermal functionality modeling of cross-flow warmth exchangers, with functions in chemical, refrigeration and motor vehicle industries. this technique permits acquiring effectiveness-number of move devices (e-NTU) information and has been used for simulating numerous ordinary and complicated circulation preparations configurations of cross-flow warmth exchangers. Simulated effects were verified via comparisons with effects from on hand particular and approximate analytical suggestions. Very exact effects were got over broad levels of NTU and C* values in all instances. The proposed technique constitutes an invaluable learn device for either theoretical and experimental stories of cross-flow warmth exchangers.
The following are the original beneficial properties 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 strategy might be used for decreasing experimental facts utilizing the effectiveness - NTU (e-NTU) process in learn and business laboratories.
- Even after a couple of century in warmth exchanger study, the quest for brand new circulate preparations with better effectiveness nonetheless is an unsolved challenge. the current method can be a great tool in pursuing that goal.
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Extra info for Thermal Performance Modeling of Cross-Flow Heat Exchangers
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.
2009) and Cabezas-Gómez et al. (2012). However, the present version of the code does not contemplate the complete mixture of the external fluid between passes. 1 Numerical Procedure of the HETE Code 25 Details of the procedure described above will be developed in the next section. The following is a summary of the steps involved in the procedure. 1). (2) Then thermal input data are read. (3) The iterative solution of the governing equations follows next. This is the step where the code algorithm is applied ending with the computation of the desired thermal characteristics.
At his point it is important to stress that, since the inlet as well as the outlet temperatures of the cold stream might vary along e − Te , width of the element, the cold fluid variation along the element, Tce = Tc,o c,i is determined in terms of the average inlet and outlet temperatures of the cold e and T e . fluid, that is, Tc,i c,o The closure of the set of algebraic equations requires an additional equation which is the one of the thermal effectiveness, given by integration of Eq. 30) over the total area of the element.