Exploration PLSS Thermal Desktop Modeling

Date

2019-07-07

Journal Title

Journal ISSN

Volume Title

Publisher

49th International Conference on Environmental Systems

Abstract

The Exploration Portable Life Support System (xPLSS) maintains life support for a suited crew member during Extravehicular Activity (EVA). The thermal and pneumatic/hydraulic interactions within the xPLSS have been modeled using Thermal Desktop ®. In addition to these interactions, a human thermal model (METMAN) that includes metabolic, respiration, muscular work, and active body thermoregulation, was used to include the crew member as part of the loop. The model is a system level simulation and is being used to estimate thermal boundary conditions for detailed xPLSS component analyses. To date, this model has been used to evaluate the cooling system capabilities for keeping the crew member comfortable in a range of thermal environments and off nominal operating conditions, the thermal and pressure conditions during failed open relief valve scenarios, temperature effects on the removal efficiencies of the carbon dioxide and humidity control unit and detailed thermal analysis of batteries. In summary, this Thermal Desktop ® is supporting many of the design review products for the xPLSS as it comes to maturity and providing insight into the operations of the xPLSS in many operating conditions and scenarios.

Description

Bruce Barnes, Aerodyne, USA
Brittany Abraham, Aerodyne, USA
Bruno Miranda, Jacobs Engineering, USA
Latham Speasmaker, Jacobs Engineering, USA
Quoc Nguyen, Jacobs Engineering, USA
ICES402: Extravehicular Activity: PLSS Systems
The 49th International Conference on Environmental Systems as held in Boston, Massachusetts, USA on 07 July 2019 through 11 July 2019.

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Availability

Keywords

PLSS, xEMU, Thermal, modeling, hydraulic, pneumatic, Thermal Desktop

Citation