Designing Shell-and-Coil Mixed Convection Heat Exchangers

A design problem of a mixed convection heat exchanger can not be treated totally similar to the case of the regular heat exchangers due to extra unknown parameters. In this paper procedures for designing mixed convection shell-and-coil heat exchangers are proposed for both rating and sizing problems. Flowcharts of the procedures are presented and a number of examples of problems have been tested. The proposed procedures show reasonable accuracy (max. error of 11.57%) in determining the required heat transfer area and also in predicting the thermal performance of a heat exchanger with known geometry (max. error of 7.87%).