Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5444299 | Energy Procedia | 2017 | 8 Pages |
Abstract
In this paper, a modeling approach for a heat exchanger that uses a binary mixture is presented. A moving boundary method assuming a linear spatial distribution of enthalpy could result in a considerable steady state prediction error, due to the temperature glide of a binary mixture. Motivated from this, a more accurate moving boundary method that incorporates analytic enthalpy distributions is presented. The enthalpy profiles are derived by defining a specific heat capacity at each thermodynamic phase of a binary mixture and by solving crossflow heat transfer equations. The proposed approach results in accurate predictions compared with those of a detailed model using the Finite Volume Method (FVM). The corresponding computation time is two to three times slower than that of a conventional moving boundary approach, but the approach is still computationally advantageous compared with the FVM model.
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Donghun Kim, Davide Ziviani, James E. Braun, Eckhard A. Groll,