This paper presents the study of a heat pipe-equipped heat exchanger with two filling ratios of R134a 19% and 59%, respectively. The airflow rate varies from 0.4 to 2.0 kg/s. The temperatures at the evaporator side of the heat pipe vary from 40 to 70°C and at the condenser part from 20 to 50°C. The performance of the heat exchanger has been compared with two pool boiling models, Cooper and Gorenflo, and two filmwise condensation models, Nusselt and Butterworth. A fairly good agreement is found for measurements and the model of Cooper at low airflow Reynolds number at the evaporator side of the heat exchanger. The result of this study is that a heat pipe equipped heat exchanger can replace a water-cooled heat exchanger without loss of performance. The tested process conditions are typical for warmer countries.
|Title of host publication||CMFF'06 : conference on modelling fluid flow : proceedings of the 13th international conference on fluid flow , September 6-9 2006, Budapest, Hungary, Vol.1|
|Publication status||Published - 2006|
|Event||conference; Int. conf. on Fluid Flow Technologies; 2006-09-06; 2006-09-09 - |
Duration: 6 Sep 2006 → 9 Sep 2006
|Conference||conference; Int. conf. on Fluid Flow Technologies; 2006-09-06; 2006-09-09|
|Period||6/09/06 → 9/09/06|
|Other||Int. conf. on Fluid Flow Technologies|