การควบแน่นและการถ่ายเทความร้อนในท่อที่มีขนาดเล็ก

Abstract

The purpose of this engineering scheme was to study a condenser and heat transferring of the refrigerant in a small diameter pipe. Which the researcher designed the systems of condensing and heat transferring by using R-12 refrigerant as working fluid and used the water as a coolant An equipment to be used for heat transferring was the type of shell and lube with small diameter of 2.527 centimeters and the pipe diameter of 0.25 centimeterscomprising of three pipes. In part of a pipe for using in heat transferring , its length was 80 centimeters. The part of such a pipe was used for study the transferring of heal between the refrigerant and water From an experiment, it was found that the rale of water flow resulted in coefficient of the total heat transferring and coefficient of heat transferring inside the pipe. Namely , when the rate of water flow was increased, it would make the total coefficient of heat transferring and heat transferring inside the pipe improved.