Browse Publications Technical Papers 2003-01-2519
2003-07-07

International Space Station Internal Thermal Control System Lab Module Simulator Build-Up and Validation 2003-01-2519

As part of the Sustaining Engineering program for the International Space Station (ISS), a ground simulator of the Internal Thermal Control System (ITCS) in the Lab Module was designed and built at the Marshall Space Flight Center (MSFC). To predict ITCS performance and address flight issues, this facility is operationally and functionally similar to the flight system and flight-like components were used when available. Flight software algorithms, implemented using the LabVIEW® programming language, were used for monitoring performance and controlling operation. Validation testing of the low temperature loop was completed prior to activation of the Lab module in 2001. Assembly of the moderate temperature loop was completed in 2002 and it was validated in 2003. Even before complete validation the facility was used to address flight issues, successfully demonstrating the ability to add silver biocide and to adjust the pH of the coolant. Upon validation of the entire facility, it will also be capable of evaluating payload timelining, operational modifications, physical modifications, and other aspects affecting the thermal control system.

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