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Relevant bibliographies by topics / Cascade Refrigeration

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Dissertations / Theses

Academic literature on the topic 'Cascade Refrigeration'

Author: Grafiati

Published: 11 September 2023

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Dissertations / Theses on the topic "Cascade Refrigeration"

1

Haile-Michael, Getu. "Cascade and secondary coolant supermarket refrigeration systems : modelling and new frost correlations." Thesis, University of Auckland, 2011. http://hdl.handle.net/2292/6846.

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Nowadays traditional (direct expansion) supermarket refrigeration systems are mostly employed in supermarket establishments for refrigerating food products and beverages in the store. However, the installations of long piping system, fittings and joints in traditional systems are causing substantial refrigerant losses. The refrigerant losses in turn bring about cost and high environmental damage in terms of ozone layer depletion and global warming potential. Additionally, defrosting of air-coils is one of the most energy consuming processes in supermarket refrigeration systems due to sus

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2

Schutte, Abraham Jacobus. "Demand-side energy management of a cascade mine surface refrigeration system / A.J. Schutte." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1843.

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The investigations focus on load shifting, load clipping and energy efficiency through control strategies. Load shifting is achieved by increasing the amount of work done in the Eskom non-peak period. This then results in a decrease in the Eskom peak time work load. The mine refrigeration system is modelled and verified with the data. A simulation is made from the model and the simulation is used to develop the new control strategy and new operational parameters. Predicted results are verified to be within production operational constraints. A case study was carried out to prove the effectiv

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3

Sawalha, Samer. "Carbon Dioxide in Supermarket Refrigeration." Doctoral thesis, Stockholm : Energiteknik, Energy Technology, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4753.

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4

Queiroz, Marcus Vinícius Almeida. "Avaliação experimental de um sistema de refrigeração cascata subcrítico com HFCs/C02." Universidade Federal de Uberlândia, 2017. https://repositorio.ufu.br/handle/123456789/19110.

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Este estudo avalia o desempenho de um sistema em cascata em operação subcrítica utilizando o par R134a/R744, como uma opção a sistemas convencionais em supermercados que normalmente utilizam R404A ou R22. O aparato experimental consiste em um compressor alternativo de velocidade variável para R744 e uma válvula de expansão eletrônica que promove a evaporação direta do CO2 dentro de uma câmara fria (2,3m x 2,6m x 2,5m) para manter a temperatura interna do ar estável. O ciclo de alta temperatura consiste em um compressor alternativo para R134a, uma válvula de expansão eletrônica, e um condensado

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5

Coggins, Charles Lee. "Single- and Multiple-Stage Cascaded Vapor Compression Refrigeration for Electronics Cooling." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16283.

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The International Technology Roadmap for Semiconductors (ITRS) predicts that microprocessor power consumption will continue to increase in the foreseeable future. It is also well known that microprocessor performance can be improved by lowering the junction temperature: recent analytical studies show that for a power limited chip, there is a non-linear scaling effect that offers a 4.3x performance enhancement at -100 °C, compared to 85 °C operation. Vapor Compression Refrigeration (VCR) is a sufficiently compact, low cost, and power efficient technology for reducing the junction temperature

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6

Скрипник, О. В., В. В. Свяцький, O. Skrypnyk та V. Sviatskyi. "Перспективні напрямки технологічного застосування гідратів двооксиду вуглецю". Thesis, ХНТУ, 2017. http://dspace.kntu.kr.ua/jspui/handle/123456789/6869.

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Наведено аналіз останніх досліджень і приклади застосування газових гідратів двооксиду вуглецю. Наведено приклад можливості заміщення двооксидом вуглецю метану у природніх гідратах, організовуючи контрольований видобуток метану із субаквальних газогідратних покладів. Розглянуто питання про обмеження викиду парникових газів за рахунок їх уловлювання і зберігання за допомогою технології CCS (Carbon Capture and Storage). Наведено приклад каскадних систем на базі аміаку з двооксидом вуглецю із сумішами вуглеводнів як основу холодильних установок для одержання глибокого холоду. Розглянуто спосіб ви

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7

Cipolato, Liza. "Analise exergetica de um ciclo em cascata para liquefação de gas natural." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266261.

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Orientador: Jose Vicente Hallak D'Angelo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T14:06:54Z (GMT). No. of bitstreams: 1 Cipolato_Liza_M.pdf: 1029854 bytes, checksum: e29def5b437d5ad6a00d8fc677c63bf5 (MD5) Previous issue date: 2008<br>Resumo: O comércio de gás natural liquefeito apresenta um crescente interesse por parte tanto de países exportadores como dependentes desta fonte energética. Apesar de o transporte por gasoduto ser muito menos suscetível a perdas, ele se torna inviável a longas distân

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8

Goloubev, Dmitri. "Kühlung eines resistiven HTSL-Kurzschlussstrombegrenzers mit einer Gemisch-Joule-Thomson-Kältemaschine." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1095838519812-78347.

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Die vorliegende Arbeit beschäftigt sich nach der Analyse und Optimierung der Stromzuführungen auf Flüssigstickstoff-Temperaturniveau, hauptsächlich mit der Untersuchung einer Gemisch-Stickstoff-Kaskade als Kälteversorgungssystem eines resistiven HTSL-Kurzschlussstrombegrenzers. Unter einem Kurzschlussstrombegrenzer versteht man einen veränderlichen elektrischen Widerstand, welcher, gegebenenfalls in Serie mit konventionellen, mechanischen Stromunterbrechern, direkt in den zu schützenden Stromkreis eingebaut ist. Als veränderlicher elektrischer Widerstand kann z.B. ein supraleitendes Element ve

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9

Goloubev, Dmitri. "Kühlung eines resistiven HTSL-Kurzschlussstrombegrenzers mit einer Gemisch-Joule-Thomson-Kältemaschine." Doctoral thesis, Technische Universität Dresden, 2003. https://tud.qucosa.de/id/qucosa%3A24374.

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Die vorliegende Arbeit beschäftigt sich nach der Analyse und Optimierung der Stromzuführungen auf Flüssigstickstoff-Temperaturniveau, hauptsächlich mit der Untersuchung einer Gemisch-Stickstoff-Kaskade als Kälteversorgungssystem eines resistiven HTSL-Kurzschlussstrombegrenzers. Unter einem Kurzschlussstrombegrenzer versteht man einen veränderlichen elektrischen Widerstand, welcher, gegebenenfalls in Serie mit konventionellen, mechanischen Stromunterbrechern, direkt in den zu schützenden Stromkreis eingebaut ist. Als veränderlicher elektrischer Widerstand kann z.B. ein supraleitendes Element ve

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10

KUMAR, PRAKASH. "CASCADE REFRIGERATION CYCLE." Thesis, 2017. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16002.

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A thermodynamic analysis is done for cascade cycle which is a combination of vapour compression system with vapour absorption system. The objective of the work is to determine the effects of different parameters on the performance of the cycle. Equations used follow the first law of thermodynamics. Capacity of the cascade cycle is taken as 50 kw. Refrigerants used in the cycle are lithium bromide-water in the absorption cycle and R134a in the vapour compression cycle. EES has been used to find out the results through doing simulation in it. The result of the simulation is to study the relation

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