Analysis of evaporative coolers and condensers

[摘要] ENGLISH ABSTRACT:In this report various mathematical models for the thermal evaluation ofevaporative coolers and condensers are presented. These models range fromthe exact model based on the work by Poppe [84P01] to the simplifiedlogarithmic models based on the work of McAdams [54Mcl] and Mizushinaet al. [67MI1], [68MI1].Various computer programs were written to perform rating and selectioncalculations on cross-flow and counterflow evaporative coolers andcondensers.Experimental tests were conducted on a cross-flow evaporative cooler todetermine the governing heat and mass transfer coefficients. Theexperimentally determined coefficients were cqrrelated and thesecorrelations are compared to the existing correlations. The two-phasepressure drop across the tube bundle was also measured and a correlationfor two-phase pressure drop across a tube bundle is presented.

[发布机构] Stellenbosch University