A Novel Membrane Device for the Removal of Water Vapor and Water Droplets from Air

Paper #:
  • 921322

Published:
  • 1992-07-01
Citation:
Ray, R., Newbold, D., McCray, S., Friesen, D. et al., "A Novel Membrane Device for the Removal of Water Vapor and Water Droplets from Air," SAE Technical Paper 921322, 1992, https://doi.org/10.4271/921322.
Pages:
10
Abstract:
One of the key challenges facing NASA engineers is the development of systems for separating liquids and gases in microgravity environments. In this paper, a novel membrane-based phase separator is described. This device, known as a water recovery heat exchanger (WRHEX), overcomes the inherent deficiencies of current phase-separation technology. Specifically, the WRHEX cools and removes water vapor or water droplets from feed-air streams without the use of a vacuum or centrifugal force. As is shown in this paper, only a low-power air blower and a small stream of recirculated cool water is required for WRHEX operation.This paper presents the results of tests using this novel membrane device over a wide range of operating conditions. The data show that the WRHEX produces a dry air stream containing no entrained or liquid water--even when the feed air contains water droplets or mist. An analysis of the operation of the WRHEX is presented.
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