摘要:
Described are fuel cell/inerting systems (12, 20) having at least one fuel cell system (10), at least one dryer coupled en (26) to a fuel tank (40), at least one ODA flow selector valve (28) having a first outlet port coupled to a cargo bay (38), and a second outlet port coupled to the dryer (26), and a controller (36). The fuel cell/inerting system detects an amount of ODA output from the fuel cell system and transmits a signal to the ODA flow selector valve instructing the ODA flow selector valve to open both outlet ports when the controller determines that the amount of ODA output is sufficient to supply the cargo bay (38) and the fuel tank (40) or close one of the two outlet ports when the controller determines that the amount of ODA output is insufficient to supply the cargo bay and the fuel tank. ODA: Oxygen Depleted Air NEA: Nitrogen Enriched Air
摘要:
Noise and room air overpressure on discharge of a gas extinguisher system is reduced. During the discharge, an extinguishing fluid is conveyed from a pressurized container via a container valve and line system to an extinguishing nozzle. At the beginning of the discharge the extinguishing fluid is predominantly present in the line system in liquid phase and after discharge it assumes a predominantly gaseous phase. In a phase transition period, which is accompanied by a significant reduction in the extinguishing fluid mass flow and a significant increase in the noise and the room air pressure, the mass flow is then reduced or stopped. Due to the reduction of the mass flow, the sound level of the noise arising is advantageously reduced to a value of a maximum of 100 dB and the room air pressure to an overpressure value ranging from 200 to 1000 Pa.
摘要:
A system for generating an inert gas. An embodiment of the system comprises a turbine engine, a compressor and a blower. Additional elements may be provided to condition the air so that it is satisfactory for use in the fuel tank. Such elements include filters, catalytic converters, air pressure regulators, and heat exchangers, as well as elements to monitor the oxygen content and temperature of the air flow. An embodiment of a method for generating an inert gas is also provided. The method comprises combusting fuel to generate engine exhaust, compressing the engine exhaust to generate compressed exhaust, and directing said compressed exhaust into the fuel tank.
摘要:
The invention relates to the use of a gas or liquid-jet curtain generated by spraying non-flammable gases or liquids for diluting and/or ejecting clouds of flammable gases, the density of which does not exceed the density of air, from containments that have one or more outer openings, and also to a method for diluting and/or ejecting clouds of flammable gases, the density of which does not exceed the density of air, from containments that have one or more outer openings, wherein, by spraying non-flammable gases or liquids at at least one outer opening, a gas or liquid-jet curtain is generated that dilutes the clouds of flammable gases situated in the containment or bears them in the direction of the at least one outer opening and thus ejects them.
摘要:
A fire extinguishing agent may include a foam and at least one inert gas combined with the foam. A method of extinguishing a fire including a burning metal and/or a burning metal compound and also including a burning plastic material and/or a burning paper material may include combining a foam and at least one inert gas to form a fire extinguishing agent, and applying the fire extinguishing agent to the fire.
摘要:
The invention relates to an inerting method as well as an inerting system (1) to set and/or maintain a reduced oxygen content in an enclosed room (2), wherein a gas separation system (3.1, 4.1; 3.2, 4.2; 3.3, 4.3) is provided which separates off at least a portion of the oxygen from an initial gas mixture provided in a mixing chamber (6) and by so doing, provides a nitrogen-enriched gas mixture. In order to optimize the operation of the inerting system (1), the invention provides for a portion of the air to be withdrawn from the enclosed room (2) and admixed with fresh air in the mixing chamber (6).
摘要:
This discovery provides means to move cryogenic liquids safely in circumstances not needing long term liquid state preservation, to: reduce mass from current practiced cryogenic containments, lower cost, making methods affordable, and be disposable, if necessary. Using liquid Nitrogen as the transport agent for Nitrogen gas in fire, crises and energy situations allows expelling of foreign substances by both liquid and gaseous Nitrogen keeps both temperature and purity of the gas. expanding quantity at evaporation to over 200 times volume, and employing plastic materials properly constructed for rapid movement, thermal insulation, inclusion of electrical wiring and function in dead air space, and flow direction control using valves. This allows fixed Nitrogen fire control systems, replacing water sprinkler systems, eliminating water damage and electrical arcing. Implementing cryogenic operations broadens with economical, reliable equipment and tools when long term retention of liquid state is not required.
摘要:
A method and apparatus is disclosed for ejecting material. The ejected material is ejected as liquid and liquid vapor via an explosive process which can provide a very fast ejection as well as an ejection which has a large throw. The apparatus can be used to eject fuel for a fuel injector.
摘要:
A temperature-control and fire-suppression system is provided for a system space, which optionally houses IT equipment. The system space has a ventilation system for providing controlled temperature air, for example to the IT equipment. A store of a fire-suppressing gas in liquid form is coupled to a supply means for supplying the fire-suppressing gas in liquid form to the system space, such that evaporation of the fire-suppressing gas in liquid form cools, or absorbs energy, from, the air in the system space. A temperature sensor is provided for sensing a temperature in the system space and a controller is responsive to the sensed temperature for controlling the supply means, to supply the fire-suppressing gas in liquid form while maintaining the sensed temperature above a predetermined lower temperature.
摘要:
A method of conditioning oxygen depleted air (ODA) exhausted from a fuel cell comprising the steps of; taking fuel from an aircraft fuel tank collector cell, delivering said fuel to a rear mounted engine via a primary heat exchanger, taking exhaust ODA from a fuel cell, passing the ODA through the primary heat exchanger in the opposite direction to the fuel, such that the fuel acts as a heat sink for the ODA, to cool the ODA, passing the ODA through a dryer, to dry the ODA and using the cooled, dried ODA to inert fuel in the aircraft fuel tank.