Unit Operation Performance Testing of Cascade Distillation Subsystem

Date

2014-07-13

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44th International Conference on Environmental Systems

Abstract

The Cascade Distillation System (CDS) is a waste water recovery technology being developed under NASA’s Advanced Exploration System (AES) water recovery project. The Cascade Distiller (CD) is the principal component of the CDS. The CDS prototype unit was extensively tested at NASA Johnson Space Center (JSC) during 2008 and 2009. In 2012 the need for additional CD testing was identified to determine thermodynamic, hydraulic, and distillation performance through experiment at operating conditions of interest. This paper discusses this operational testing performed at Honeywell in 2012 on the prototype Cascade Distiller. The thermodynamic performance demonstrated an average specific energy for recovered water of 92 watt-hr/kg. The limiting process recovery of distilled water was 95% of the feed on a weight basis. The distillation performance was tested using a chemical analysis method that used a water soluble red dye. This new method allows qualitative and quantitative measures of the concentrations of salt in the CD and the distillation efficiency.

Description

Tucson, Arizona
David Loeffelholz, Honeywell, International, USA
Ben Baginski, Honeywell, International, USA
Vipul Patel, Honeywell, International, USA
Allen MacKnight, Honeywell, International, USA
Sarah Schull, Johnson Space Center, USA
Miriam Sargusingh, Johnson Space Center, USA
Michael Callahan, Johnson Space Center, USA
The 44th International Conference on Environmental Systems was held in Tuscon, Arizona, USA on 13 July 2014 through 17 July 2014.

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