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Development of a nonazeotropic heat pump for crew hygiene water heatingA heat pump system is currently under development to produce hot water for crew hygiene on future manned space missions. The heat pump uses waste heat sources and a nonazeotropic working fluid in a highly efficient cycle. The potential benefits include a reduction in peak power draw from 2 to 5 kW for electric cartridge heaters to just more than 100 W for the heat pump. As part of the heat pump development project, a unique high efficiency compressor was developed to maintain lubrication in a zero-gravity environment.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Walker, David H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Deming, Glenn I.
(Foster-Miller, Inc. Waltham, MA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
SAE PAPER 911341
Meeting Information
Meeting: International Conference on Environmental Systems
Location: San Francisco, CA
Country: United States
Start Date: July 15, 1991
End Date: July 18, 1991
Accession Number
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