Efficiency of Multilayer Insulations in Cryogenic Applications

Distillation of hydrogen isotope as the target separation of deuterium, intended to use heavy water as moderator and primary heat agent, in reactors using natural uranium as fuell. Heavy water production facilities are hydrogen distillation plant grafted on plants producing or consuming hydrogen. The thermal insulation used in this cryogenic cicle reduced the heat transfer. The cryogenic heat transfer fluid from the external environment in the liquid plays, using various thermal insulation systems, are an important role in efficiency of liquefaction system. The choice of insulation depends largely on the specific application, and among the factors that must be considered are power, weight, ease of application and cost. Cryogenic insulation can be: - High vacuum insulation; - Vacuum multilayer insulation; - Insulation vacuum with dust; - Homogenous insulation material (glass wool, cellular foams) - Composite insulation system. Aim of this study is to find an effective component of multilayer insulation with a multiplier effect in increasing the efficiency of cryogenic cycles.