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Technical Paper

Space Station Surface Touch Temperature Study

1993-07-01
932199
In order to reduce the condensation in the Space Station Freedom module, the design of its surface and/or the meteoroid protection shield surface requires special coating to raise the surface temperature while on orbit. This raises a concern of whether the Extravehicular Mobility Unit (EMU) glove will be able to protect the crew member during the Extravehicular Activity (EVA) when the crew member touches the hot or cold surface. EMU gloves provide protection to crew members' hands from a hot or cold touch temperature during an EVA when grasping or touching an object. These gloves also provide protection to crew members in extreme thermal environments. A glove thermal model with the most up-to-date configuration information was developed and utilized to predict reliable touch temperature limits. The analyses performed evaluated several worst case scenarios of both hot and cold environments and object temperatures.
Technical Paper

Space Shuttle Launch Entry Suit Thermal Performance Evaluation

1993-07-01
932297
Comments of the Space Shuttle crew indicate that the Launch Entry Suit (LES) may provide inadequate cooling before launch and after reentry. During these periods some crewmembers experienced thermal discomfort induced by localized cabin heating, middeck experiments, and crewmembers' body heat and humidity. The NASA Johnson Space Center(JSC) Crew and Thermal System Division (CTSD) executed a two phase study, analysis and testing, to investigate this problem. The analysis phase used a computer model of the LES to study the transient heat dissipation and temperature response under the various Space Shuttle flight cabin environments. After the completion of the analysis, the testing phase was conducted to collect the engineering data in order to validate the analysis results. Due to the constraint of the test facility, the test was conducted on the air cooled techniques only. This paper presents the analytical model, its solution and an evaluation and summary of the test results.
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