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One of relatively modern directions of two-phase technology in Russia is the development of thermoautofluctuating two-phase heat transferring devices (TTHD ). It is very complicated to classify these devices because of great amount of its constructive variations. However, it is possible to notice, that all TTHD differ from other two-phase heat transferring devices (such, as heat pipes, thermo-syphons, CPL and etc.) by following: circulation of working fluid in TTHD happens periodically. In separate elements of TTHD the liquid, at first, is serially accumulated and then it is spended, and this process is periodically repeated. In some cases the element, in which there are excited the thermoautofluctuations, can functionally execute the role of usual pump providing circulation of liquid working fluid. At the same time thermoautofluctuations are supported by means of usual small-power heater (for example, electrical).

In this paper there are considered some differences between the Loop Heat Pipes (LHPs) and the Capillary Pumped Loops (CPLs) performances. There offered the methods of the capillary evaporators reliability function increasing for two-phase systems of the LHP and the CPL type. The reliability increasing of above mentioned systems evaporators is proposed to be done by using of composite wicks and/or thermal electrical coolers. The recommended means could decrease the probability or except completely the “vapor blocade” of absorbing surface of evaporators capillary pumps.

A universal autonomous controlled heat transferring module on base of two-phase loop with capillary pump have been elaborated. This module consists of one evapourator and one radiator-condenser. Various variants for suggested module control by using of active or passive elements, providing the CPL start-up, restarting and temperature regulation, have been considered. There is determined a structure concept and recommendations on mathematical modeling of Thermal Control System (TCS), made on base of several controlled heat transferring modules with capillary pumps, are given. There are given results of computer experiment with mathematical model of artificial Earth satellite payload TCS. This TCS consists of four controlled, independent in power supply, CPL, which start-up and control are carried out by using of passive devices.