Air dehumidification by membrane with cold water for manned spacecraft environmental control

Locating air leaks in manned spacecraft using structure-borne noise.

All manned spacecraft are vulnerable to leaks generated by micrometeorite or debris impacts. Methods for locating such leaks using leak-generated, structure-borne ultrasonic noise are discussed and demonstrated. Cross-correlations of ultrasonic noise waveforms from a leak into vacuum are used to find the location of the leak. Four methods for sensing and processing leak noise have been develope...

Hollow Fiber Membrane Dehumidification Device for Air Conditioning System

In order to provide a comfortable living and working environment indoors in tropical countries, the outdoor air often needs to be cooled and dehumidified before it enters the rooms. Membrane separation is an emerging technology for air dehumidification and it is based on the solution diffusion mechanism. Water molecules are preferentially permeating through the membranes due to its smaller kine...

Carbon Dioxide Measuring Systems for Manned Spacecraft.

For manned space flight to date, three types of CO2 sensors have been developed. At present, the infrared approach to CO 2 detection is considered the most reliable and sensitive system available for use in manned space flight. The problems of total pressure sensitivity can be offset electronically, ff required, on future missions; however, at present, the excellent pressure control which the e...

Risk-based Fire Safety Experiment Definition for Manned Spacecraft

Analysis and Synthesis of a Subsystem of the Manual Control Loop for Manned Spacecraft

A salient feature of the manned spacecraft is the predominance of discrete information in the manual control loop of the onboard systems. Specifically, command-signaling control panels (CSCP) as a subsystem of the manual control loop are widely used in the Russian manned spacecraft. In this paper CSCP are classified into four types: a) control panels based on multichannel control; b) control pa...