CONCERNING POBBILILITY OF COMPENSATING HEAT INPUTS INTO LIQUID HELIUM

The possibility of the partial compensation of heat influxes into liquid helium using return streams of evaporated helium, say, in a simple Joule-Thomson cycle is discussed. The elevated pressure helium flow can be cooled to sufficiently low temperatures because of the larger quantity of return flow. Unlike liquefiers and refrigerators whose net refrigeration capacity is correspondingly greater than or equal to the heat load, the 'refrigeration capacity' of the devices under consideration is less than the heat load. Such devices one can consider as 'compensators'. It is shown that the pressure range needed is of the order of several atmospheres. Some basic design relationships are derived. The experiments carried out confirmed the possibility of the compensation of a considerable part of heat influxes. The experimental arrangement as well as the main experimental results are briefly described. Some possible applications of compensators are discussed. © 1969.