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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 5. Отображено 5.
01-08-2013 дата публикации

METHOD AND SYSTEM FOR AIR SEPARATION USING A SUPPLEMENTAL REFRIGERATION CYCLE

Номер: US20130192301A1
Автор: Dowd Sophia J., Parsnick David R., Rauch Jeremiah J., Warta Andrew M., Wu Hao
Принадлежит:

A system and method for air separation using a supplemental refrigeration cycle is provided. A portion of the refrigeration required by the air separation plant to produce a liquid product stream is supplied via a supplemental refrigeration circuit configured to direct a cooled refrigerant produced by the turboexpander through the main heat exchanger of the air separation plant. The refrigeration capacity is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus decreases the production of the liquid product stream. Adding refrigerant allows for an increase in the refrigeration imparted by the supplemental refrigeration circuit and thus allows for increased production of the liquid product stream. 1. A method of separating air comprising the steps of:conducting a cryogenic rectification process in an air separation plant comprising a main heat exchanger to cool a compressed and purified feed air stream to a temperature suitable for the rectification of the feed air stream and a distillation column system configured to rectify the compressed, purified and cooled air to produce at least one liquid product stream;providing a portion of the refrigeration required by the air separation plant to produce the at least one liquid product stream via a supplemental refrigeration circuit, the supplemental refrigeration circuit comprising a working fluid; a compressor section configured to compress the working fluid; and a turboexpander section configured to expand the working fluid to generate cooled working fluid, the supplemental refrigeration circuit configured to direct the cooled working fluid through the main heat ...

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Номер записи: 1
20-02-2020 дата публикации

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF LIQUID OXYGEN FROM A NITROGEN AND ARGON PRODUCING CRYOGENIC AIR SEPARATION UNIT

Номер: US20200054985A1
Автор: Billingham John F., Parsnick David R., Prosser Neil M.
Принадлежит:

A moderate pressure, argon and nitrogen producing cryogenic air separation unit and air separation cycle having a higher pressure column, a lower pressure column and an argon column arrangement is disclosed. The moderate pressure, argon and nitrogen producing cryogenic air separation unit is configured to take a first portion of an oxygen enriched stream from the lower pressure column, which together with an external source of liquid nitrogen is used as the boiling side refrigerant to condense the argon in the argon condenser. Use of the external source of liquid nitrogen in the argon condenser allows a second portion of the oxygen enriched stream from the lower pressure column to be taken as a liquid oxygen product stream. 1. A nitrogen and argon producing cryogenic air separation unit comprising:a distillation column system having a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser-reboiler and configured to separate an incoming feed air stream and produce an oxygen enriched stream from the base of the lower pressure column and a nitrogen product stream from the overhead of the lower pressure column;the distillation column system further includes an argon column arrangement operatively coupled with the lower pressure column, the argon column arrangement having at least one argon column and an argon condenser, and wherein the argon column arrangement is configured to receive an argon-oxygen enriched stream from the lower pressure column and to produce an oxygen enriched bottoms stream that is returned to or released into the lower pressure column and an argon-enriched overhead that is directed to the argon condenser;wherein the argon condenser is configured to condense the argon-enriched overhead against a mixture of a first portion of the oxygen enriched stream from the lower pressure column and a stream of liquid nitrogen from an external source to produce a crude argon stream or a product argon stream, an ...

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Номер записи: 2
02-06-2016 дата публикации

Method and system for air separation using a supplemental refrigeration cycle

Номер: US20160153711A1
Автор: Andrew M. Warta, David R. Parsnick, Hao Wu, Jeremiah J. Rauch, Sophia J. DOWD
Принадлежит: Praxair Technology Inc

A system and method for air separation using a supplemental refrigeration cycle is provided. A portion of the refrigeration required by the air separation plant to produce a liquid product stream is supplied via a supplemental refrigeration circuit configured to direct a cooled refrigerant produced by the turboexpander through the main heat exchanger of the air separation plant. The refrigeration capacity is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus decreases the production of the liquid product stream. Adding refrigerant allows for an increase in the refrigeration imparted by the supplemental refrigeration circuit and thus allows for increased production of the liquid product stream.

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Номер записи: 3
22-12-2022 дата публикации

SYSTEM AND M ETHOD FOR SUPPLYING CRYOGENIC REFRIGERATION

Номер: US20220404094A1
Автор: Billingham John F., de Castro Costa Ricardo Dutra, Handley James R., Parsnick David R., Prosser Neil M.
Принадлежит:

Various systems and methods for suppling cryogenic refrigeration to supercomputing applications such as quantum computing operations are provided. The disclosed systems and methods are flexible, efficient and scaleable to meet the cryogenic refrigeration requirements of many supercomputing applications. The disclosed systems and methods include: (i) a liquid nitrogen based integrated refrigeration system that integrates a nitrogen refrigerator with a refrigeration load circuit; (ii) a closed loop liquid nitrogen based refrigerator that provides cooling to the refrigeration load circuit via indirect heat exchange between liquid nitrogen in a nitrogen refrigerator and a separate refrigerant in a closed-loop refrigeration load circuit; and (iii) a liquid air based integrated refrigeration system that integrates an air intake system with a refrigerator and a refrigeration load circuit. 1. A liquid nitrogen based integrated refrigeration system comprising:a nitrogen refrigerator having one or more recycle compressors, a warm booster compressor, a cold booster compressor, a warm turbine, a cold turbine, and a heat exchanger with at least one cooling passage and at least one recycle passage;wherein the nitrogen refrigerator is configured to receive a source of nitrogen gas and a nitrogen return stream and produce a nitrogen refrigerant stream;a refrigeration load circuit having an expansion valve or a liquid turbine, a separator, a buffer tank, and a refrigeration load;wherein the refrigeration load circuit is configured to: (a) receive the nitrogen refrigerant stream; (b) expand the nitrogen refrigerant stream in the expansion valve or the liquid turbine; (c) separate the expanded nitrogen refrigerant stream in the separator into a liquid portion and a vapor portion; (d) cool a refrigeration load with the liquid portion of the expanded nitrogen refrigerant stream while vaporizing the liquid portion of the expanded nitrogen refrigerant stream; and (e) return the vaporized ...

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Номер записи: 4
20-08-1996 дата публикации

Cryogenic rectification system for producing dual purity oxygen

Номер: US5546767A
Автор: David R. Parsnick, James R. Dray, Michael W. Wisz, Theodore F. Fisher
Принадлежит: Praxair Technology Inc

A cryogenic rectification system employing a double column and two auxiliary reboilers associated with one or two auxiliary columns wherein both lower purity oxygen and higher purity oxygen is produced.

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Номер записи: 5