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Active Thermal Control System (ATCS) Overview

IDS Business Support, Communications and Community Affairs Box 516 St. Louis, MO 63166 Active Thermal Control System (ATCS) Overview EEATCS ( )/EATCS ( +) Active Thermal Control System Architecture Most of the Station's many systems produce waste heat , which needs to be transferred from the ISS to space to achieve Thermal Control and maintain components at acceptable temperatures. An Active Thermal Control System (ATCS) is required to achieve this heat rejection function when the combination of the ISS external environment and the generated heat loads exceeds the capabilities of the Passive Thermal Control System to maintain temperatures.

excess heat from the Electrical Power System (EPS) components in the Integrated Equipment Assembly (IEA) on P4 and eventually S4 and transport this heat to the PV radiators (located on P4, P6, S4 and S6) where it is rejected to space. The PVTCS consist of ammonia coolant, eleven

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