Investigation of Humidity Control Via Membrane Separation for Advanced Extravehicular Mobility unit (EMU) Application

Newbold, David D.; Ray, Rod; Pledger, William A.; McCray, Scott B.; Brown, Mariann F.

doi:10.4271/891507

SAE Technical Paper Series 1989

DOI: 10.4271/891507

|View full text |Cite

Investigation of Humidity Control Via Membrane Separation for Advanced Extravehicular Mobility unit (EMU) Application

David D. Newbold¹,

Rod Ray²,

William A. Pledger³

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1990

2008

Publication Types

Select...

Other4

Relationship

Self Cite0

Independent4

Authors

Journals

Cited by 4 publications

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

A Test Plan for Sensitivity of Hollow Fiber Spacesuit Water Membrane Evaporator Systems to Potable Water Constituents, Contaminants and Air Bubbles

Bue

Trevino

Fritts

et al. 2008

SAE Technical Paper Series

View full text Add to dashboard Cite

The Spacesuit Water Membrane Evaporator (SWME) is the baseline heat rejection technology selected for development for the Constellation lunar suit. The first SWME prototype, designed, built, and tested at Johnson Space Center in 1999 used a Teflon hydrophobic porous membrane sheet shaped into an annulus to provide cooling to the coolant loop through water evaporation to the vacuum of space. This present study describes the test methodology and planning and compares the test performance of three commercially available hollow fiber materials as alternatives to the sheet membrane prototype for SWME, in particular, a porous hydrophobic polypropylene, and two variants that employ ion exchange through non-porous hydrophilic modified Nafion. Contamination tests will be performed to probe for sensitivities of the candidate SWME elements to ordinary constituents that are expected to be found in the potable water provided by the vehicle, the target feedwater source. Some of the impurities in potable water are volatile, such as the organics, while others, such as the metals and inorganic ions are nonvolatile. The non-volatile constituents will concentrate in the SWME as evaporated water from the loop is replaced by the feedwater. At some point in the SWME mission lifecycle as the concentrations of the non-volatiles increase, the solubility limits of one or more of the constituents may be reached. The resulting presence of precipitate in the coolant water may begin to plug pores and tube channels and affect the SWME performance. Sensitivity to macro-particles, lunar dust simulant, and air bubbles will also be investigated.

show abstract

A Test Plan for Sensitivity of Hollow Fiber Spacesuit Water Membrane Evaporator Systems to Potable Water Constituents, Contaminants and Air Bubbles

Bue

Trevino

Fritts

et al. 2008

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

Salad Machine: A Vegetable Production Unit for Long Duration Space Missions

Kliss

Macelroy

1990

SAE Technical Paper Series

View full text Add to dashboard Cite

The Use of Membranes in Life Support Systems for Long-Duration Space Missions

McCray¹,

Ray²,

Newbold³

1991

SAE Technical Paper Series

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Investigation of Humidity Control Via Membrane Separation for Advanced Extravehicular Mobility unit (EMU) Application

Cited by 4 publications

References 7 publications

A Test Plan for Sensitivity of Hollow Fiber Spacesuit Water Membrane Evaporator Systems to Potable Water Constituents, Contaminants and Air Bubbles

A Test Plan for Sensitivity of Hollow Fiber Spacesuit Water Membrane Evaporator Systems to Potable Water Constituents, Contaminants and Air Bubbles

Salad Machine: A Vegetable Production Unit for Long Duration Space Missions

The Use of Membranes in Life Support Systems for Long-Duration Space Missions

Contact Info

Product

Resources

About