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A Simulation model for a distillation unit which is based on the description of some hardware by hydrodynamic patterns of “ideal mixing” is developed for solving problems of prediction of the Water Reclamation System from Urine (WRS-U) operation. The model reflects the system operation algorithm and enables simulation of process hardware. The structure of the Simulation Model (SM), formalized descriptions of some units and model program implementation are shown based OSS Mir's WRS-U. Computational results are compared with test data.

The paper reviews some problems of providing the thermal conditions in the Sabatier reactor of the CO2 processing system designed to be operated on Russia's service module of ISSA. The possibility of providing and maintaining the autothermal process with heat removal off the canister surface enclosing the reactor. Some results of control system checks in the start-up, steady-state and shutdown modes are presented. The results of Russia's hardware undergone testing onsite at Dornier (Germany) and Hamilton Standard (U.S.) are discussed.