摘要:
The vapor membrane dehumidification device and method for air cycle environment control systems uses a semipermeable vapor membrane for water vapor, air separation. The vapor membrane has a high water to air permselectivity. When air containing water vapor is passed over or through the semipermeable fibers of the membrane countercurrently or crosscurrently to a purge air stream the water vapor may permeate through the fibers. Using a purge air stream of lower water vapor partial pressure relative to the feed moist air stream, the water vapor is moved to the purge air stream due to the partial pressure differential of water vapor and then expelled overboard with the purge air stream. The purge air stream can be replaced with any source of air internal or external to the aircraft such as air from the aircraft cabin.
摘要:
A two spool environmental control system includes a low pressure spool subsystem comprising a low pressure turbine and a condenser downstream of the low pressure turbine. A high pressure spool subsystem is in air flow communication with the low pressure spool subsystem and includes the condenser, a first water extractor in air communication with the condenser, a high pressure turbine downstream of the condenser, a second water extractor in air flow communication with the condenser, and a reheater downstream of the high pressure turbine.
摘要:
An environmental control system provides for two stage compression and expansion of a bleed air within a cooling cycle, while allowing for a separately driven fan to handle ambient air as a heat sink. The system comprises a plurality of compressors capable of compressing a water vapor bearing air to produce a compressed air. A reheater is capable of cooling the compressed air. A condenser is in flow communication with the reheater, with the condenser being capable of condensing the water vapor. A water extractor is in flow communication with and intermediate of the condenser and the reheater. A plurality of turbines are in flow communication with and downstream of the reheater.
摘要:
An aircraft architecture may be designed to create an optimal balance between electric power and bleed power in order to match or improve current more electric architecture (MEA) performance while simplifying power extraction from the engines as well as simplifying the electrical system. Conventional aircraft architectures may use electric only ECS and cabin pressurization systems (so-called “no bleed” systems). Alternatively, older conventional aircraft may use strictly engine bleed air to provide power for ECS and cabin pressurization systems. The present invention, on the other hand, provides an architecture which may optimize the use of both engine bleed air and MEA designs to provide a system that may be simpler and potentially more reliable and available as compared to conventional aircraft architectures.
摘要:
Systems, apparatus, and methods for the catalytic removal of at least one pollutant from an air stream via a catalytic precooler arranged in series with at least one augmentative catalytic device. The augmentative catalytic device may be located upstream or downstream from the catalytic precooler. The augmentative catalytic device may be integrated with the catalytic precooler, thereby eliminating the need for a separate housing and minimizing weight. Alternatively, the augmentative catalytic device may be disposed within a separate housing, thereby facilitating access for maintenance and decreasing direct maintenance costs.
摘要:
An environmental control system includes a single heat exchanger, a single water separator and two air cycle machines on separate spools. Cooling turbines of the air cycle machines are cascaded. Air flows through both air cycle machines during normal operation of the environmental control system. If one of the air cycle machines fails, air can be bypassed around the failed air cycle machine. Cascading allows water separation to be performed by a mid-pressure water separator located between the air cycle machines.
摘要:
An integrated system for removal of CO.sub.2 from and thermal conditioning of a gas mixture is disclosed. A pair of regenerating chemically impregnated molecular sieve absorption beds are used for removal of the CO.sub.2. A heat exchanger used in the thermal conditioning subsystem also heats the gas used to regenerate the beds and cools absorption gas. A recirculation fan moves the gas mixture throughout the entire thermal conditioning and gas purification system.
摘要:
A water purification system comprising a thermal hydrolysis catalytic reactor, an adsorbent media bed and a reverse osmosis unit is provided. The water purification system may provide potable water from non-potable water, such as non-potable water contaminated with chemical warfare agents, biological warfare agents, radioactive agents and/or Toxic Industrial Chemicals (TICs). Methods for providing potable water using the water purification system of the present invention are also provided.
摘要:
Systems, apparatus, and methods for the catalytic removal of at least one pollutant from an air stream via a catalytic precooler arranged in series with at least one augmentative catalytic device. The augmentative catalytic device may be located upstream or downstream from the catalytic precooler. The augmentative catalytic device may be integrated with the catalytic precooler, thereby eliminating the need for a separate housing and minimizing weight. Alternatively, the augmentative catalytic device may be disposed within a separate housing, thereby facilitating access for maintenance and decreasing direct maintenance costs.
摘要:
An air cycle environmental control system regenerates energy through the provision of a reheater condenser that condenses water vapor from compressed air. The condensed water vapor is extracted by a water extractor to produce dehumidified air. A subcooler heat exchanger can receive the dehumidified air for further cooling, but while causing a minimal amount of condensation. A subcooled air from the subcooler heat exchanger is then reheated in the reheater condenser, with a resulting reheated air having absorbed a heat of sensible cooling and heat of condensation. The reheated air then passes into a first turbine which recovers a heat of sensible cooling and heat of condensation. The first turbine expands the air, which then flows through the subcooler heat exchanger and into a second turbine for additional recovery of a heat of sensible cooling and heat of condensation. The second turbine cools the air by expansion for delivery to an enclosure to be conditioned.