In activity the analysis of the literature, directional on study of features of activity of a AHRS with separation of a moisture on high pressure is executed. As a result of study of design features of a AHRS the describing systems of a sectional type are established four indication: 1) a way of cooling of air high-pressure; 2) a degree of separation of a moisture: 3) a phase condition of a moisture before a cooling turbine; 4) anti-ice means of a system. The detected indications have allowed to section all diversity of the schemes of a AHRS into three basic groups: the schemes with one-time regeneration; combined AHRS; the schemes with double regeneration. As a result of the analysis the virtues and deficiencies of each of groups and separate AHRS in particular are detected.

Compact plate-fin heat exchangers are extensively used in automotive, marine and aviation industries. The thermal stress in structure of heat exchange surfaces is sufficient and leads to reduction of the resource of such devices if they are used for cooling hot air (300…600 ºС). The utilization of the approach considers the variable ratio of the thermal resistance between hot and cold sides of the heat transfer surface for design of plate-fin heat exchangers, which is one of the potential prospective ways to reduce the thermal stress in the structure. The results of numerical experiments based on the mentioned approach for the modeling of pre cooler for the aviation air conditioning systems (ACS) are presented in the article. In the present study the authors established the basic appropriateness and proposed the most optimum options for design to sharply reduce the thermal stress in the structure of plate-fin heat exchangers.

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