Aerospace Instrument-Making Annotation << Back Reserves estimation of effectiveness increase of units’ designs of the temperature control module of spacecraft service systems A.A. Loganov, M.I. Sokolov Methods of increase of small rate electric pump units’ efficiency of the service systems module are offered. Test results of multiply variants are analyzed, ratio of designs elements parameters geometrical providing the greatest thermal control system effectiveness is revealed. Increase of electric pump units’ efficiency due to the optimum current in the driving wheel organization has considerably raised their resource without application of the bearing support of the increased carrying capacity.