In this paper a model for compact evaporators and condensers is presented. The flow along a channel of a compact HE is considered to be 2-D and split into separated 1-D paths. Then, every 1-D flow path is discretised in as many elements as required. First, both fluid flow evolution along the heat exchanger are calculated through the integration of the 1-D conservation equations for single or two phase flow, assuming that wall temperatures are known. This calculation is performed through an explicit finite volume scheme, following the flow path. Once the temperature field for both fluids is calculated, then, the wall temperatures are obtained from the integration of the wall energy equation by means of an explicit scheme again. Then a new iteration starts till convergence throughout the HE is obtained. The presented method has proven to be very robust and very fast, being able to take into account local variation of properties and coefficients, and also include the calculation of longitudinal conduction.
|Publication status||Published - 2000|
|Event||Sixth International Conference on Advanced Computational Methods in Heat Transfer: Heat Transfer 2000 - , Spain|
Duration: 1 Jan 2000 → …
|Conference||Sixth International Conference on Advanced Computational Methods in Heat Transfer: Heat Transfer 2000|
|Period||1/1/00 → …|
All Science Journal Classification (ASJC) codes