A Transit Refrigerator: Cooling Power and Coefficient of Performance for a Phase-Cycle Cold Box

This paper presents a complete design study of a refrigerator that carries most of its cold-stage heat out by phase advance, computed throughout from stated assumptions. At a cold temperature of 4 K the box draws 112.1 W at the wall against 349.2 W for a fluid stage alone at the same duty, a saving of 67.9 percent. At 2 K the combined box draws 231.6 W and the saving reaches 67.1 percent, while at 10 K the box draws 42.9 W and the saving narrows to 68.6 percent. Every figure is a computed result of the stated model and nothing was built or tested: the study is SIMULATED, NOT MEASURED, and its limits are stated as plainly as its performance.