Equations for transient behaviour of parallelflow multichannel heat exchangers
Abstract
A set of partial differential equations is formulated which describes the transient behaviour of parallelflow multichannel heat exchangers. In the model, the heat capacitance of walls is neglected and heat is assumed to be transferred only in the direction perpendicular to the direction of flow of fluids. The set is solved by the MacCormack predictorcorrector method for a sample fourchannel heat exchanger. Three cases of transient behaviour of the exchanger are investigated: uniform initial temperatures in all channels, a step change in flow rate in one channel, and a step change in inlet temperature of one fluid. In the last two cases, the exchanger is initially at steady state.
 Publication:

Heat and Mass Transfer
 Pub Date:
 April 2002
 DOI:
 10.1007/s002310020293z
 Bibcode:
 2002HMT....39..321M