Enhanced Effect of a Horizontal Micro-fin Tube for Condensation Heat Transfer with R22 and R410A

摘要

This study presents the local heat transfer characteristics of R410A, a potential candi- date for replacing R22, condensing in a horizontal smooth and a micro-fin tube. For a comparison, the R22 condensation heat transfer data are also shown. The test sections of the present experimental apparatus consist of 7 counter-flow heat Exchanger type units. The refrigerant flows in a horizontal copper tube and the cooling Water flows through the annular space outside of tube.