Results from the 3-D Wissler Human Thermal Model for a Space Suit and PLSS in representative exploration environments

A system level model that integrates the Wissler human thermal model with the geometry and functionality of a suit and PLSS has been developed and validated. The model permits prediction of a system level interaction, PLSS hardware thermal control system operation, and behavior of the crewmember and their spacesuit in extreme environments, and especially of those that are strongly directional such as is experienced in space. This integrated model is used in this work to predict performance of the the suit system in several representative envirnonments, including the International Space Station environment and a Lunar Exploration environment. The results and implications of these predictions on suit and PLSS design are discussed.