THE EXTRAORDINARY PROPERTIES OF CARBON DIOXIDE AS SECONDARY REFRIGERANT
Often there exists the task to remove heat out of a very compact structure, where there is hardly any space for cooling channels. So there is the question: What is the best fluid to remove the maximum amount of heat out of a long small diameter cooling channel? Analysis shows that this depends on one hand on the available pressure drop and on the other hand on the square of the possible enthalpy change divided by the square root of the average specific volume of the fluid. If one compares different gases, liquids and phase-change materials, it turns out that fluids with the phase change from liquid to vapor just below and above the critical point provide the optimum solution. One example for such an excellent secondary refrigerant is carbon dioxide, which has the additional advantage to be a refrigerant. So it is possible to integrate the cooling loop directly into the refrigerator circuit.
H.WINKLER B.THEOBALD H.QUACK
Technische Universitaet Dresden D-01062 Dresden, Germany
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）