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Dissertations / Theses on the topic 'Refrigerasi'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Chen, Sheit Sheng. "Refrigerant distribution model development." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/35035.

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2

Yamamoto, Ryoichi. "Simulation Studies of Refrigerant Fluids." Kyoto University, 1996. http://hdl.handle.net/2433/160797.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・論文博士<br>博士(工学)<br>乙第9182号<br>論工博第3085号<br>新制||工||1035(附属図書館)<br>UT51-96-F419<br>(主査)教授藤本博, 教授山邊時雄, 教授橋本竹治<br>学位規則第4条第2項該当

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3

Cartree, Ryan R., Kyle Hollingshead, Elisabeth Lynn, and Matt West. "HFE-143 Green Refrigerant Manufacture." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192298.

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4

West, Matthew. "HFE-143 Green Refrigerant Manufacture." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/193031.

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5

Jin, Dae-Hyun. "Investigation on refrigerant distribution in evaporator manifolds." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3845.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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6

Uslu, Mustafa. "Experimental Analysis Of A Refrigerant Air Dryer." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615197/index.pdf.

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Compressed air is widely used particularly in industry. In order to increase the quality of the process and lifetime of the machine, the compressed air should be dried. Therefore the air is used after compression and drying processes. The most commonly used machines that do this process are called &ldquo<br>Refrigerant Air Dryers&rdquo<br>. These air dryers are designed to cool and dehumidify the moist air. The process of decreasing temperature is carried out by a refrigerant, R134a. Unlike design conditions, dryers are working in variable loads (variable compressed air flow rates). An experim

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7

Seubert, Carl Reiner. "Refrigerant-based propulsion system for small spacecraft." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Carl_Reiner_Seubert_Masters_Thesis_09007dcc8031c34d.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 11, 2007) Includes bibliographical references (p. 115-119).

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8

McCafferty, J. B. "Refrigerant distribution in shell and tube evaporators." Thesis, Heriot-Watt University, 1991. http://hdl.handle.net/10399/1027.

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9

Felício, Ana Helena de. "Conservação refrigerada de tangor 'Murcott' tratada termicamente." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-18072005-165142/.

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O objetivo deste trabalho foi determinar o efeito de tratamentos térmicos com ou sem aplicação de fungicida sobre a qualidade e o potencial de armazenamento de tangores. O armazenamento refrigerado por longos períodos aumenta a incidência de danos por frio (chilling) e a incidência de podridões em tangor Murcott. As frutas foram submetidas a duas temperaturas de armazenamento: 1 e 4oC, sendo que em cada uma delas os seguintes tratamentos foram aplicados: 1) Controle (frutas sem fungicida, apenas imersas em água a 25oC durante dois minutos); 2) Imersão das frutas em imazalil 50 (mg L-1 )

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10

Zacarias, Daniel Alves. "Leitura remota de temperatura em container refrigerado." reponame:Repositório Institucional da UFABC, 2015.

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Orientadora: Profa. Dr. Marcelo Bender Perotoni<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Engenharia Elétrica, 2015.<br>A proposta desse trabalho é demonstrar o desenvolvimento de um sistema de comunicação sem fio da temperatura de um container reefer. A leitura da temperatura em reefer é feita geralmente de maneira manual, de forma que a leitura remota e automática é um recurso que torna as operações de transporte e armazenagem de produtos que exigem temperatura controlada mais eficiente do ponto de vista logístico. Esse trabalho propõe a utilização

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11

DERIS, ZADEH ALI. "Raffreddamento di macchine elettriche con refrigeranti avanzati." Doctoral thesis, Università degli Studi dell'Aquila, 2021. http://hdl.handle.net/11697/169996.

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The aim of this research is to investigate the adaption of advanced coolants and phase change materials for electric machines in electric/hybrid vehicle applications. The study uses Al2O3 nanoparticles to enhance the heat transfer ability of liquid cooling systems employing the commonly used cooling jacket approach. Employing advanced coolants to improve the heat transfer performance of cooling systems with minimal changes in their structure can be considered as a cost-effective and practical approach to meet the requirements of vehicle applications. In line with this goal, in this research, b

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12

Pierri, Jacqueline. "ManagementPractical Aspects of Aqua Ammonia as Secondary Refrigerant in Ice Rinks." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289392.

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The transition from fluorinated gases to natural refrigerants could be key to reducing the impacts of climate change. Ice rinks are energy-intensive buildings, with large heating and cooling demands. The pumping power required to move the secondary refrigerant typically accounts for a sizable amount of the energy use of the refrigeration system. The use of aqua ammonia as a secondary fluid shows promising results, with pumping power use of about half that required of ethylene glycol, environmental friendliness, and low corrosivity to steel components. Aquaammonia is still novel but is currentl

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13

Santos, Leandra Oliveira [UNESP]. "Armazenamento refrigerado, atmosfera controlada e desverdecimento de tangerinas." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/105171.

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Made available in DSpace on 2014-06-11T19:33:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-12-15Bitstream added on 2014-06-13T21:06:43Z : No. of bitstreams: 1 santos_lo_dr_jabo.pdf: 961100 bytes, checksum: 071d355b742119430cc25e478c92f43b (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Este trabalho teve como objetivo avaliar o potencial de conservação pós-colheita de tangerinas ‘Fremont’, ‘Satsuma Okitsu’ e ‘Ponkan’, utilizando-se diferentes temperaturas de armazenamento e atmosfera controlada. Avaliou-se também o desverdecimento de tangerinas ‘Satsuma

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14

Schaefer, Laura Atkinson. "Heat exchanger mean temperature differences for refrigerant mixtures." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/18938.

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15

Santos, Leandra Oliveira. "Armazenamento refrigerado, atmosfera controlada e desverdecimento de tangerinas /." Jaboticabal : [s.n.], 2011. http://hdl.handle.net/11449/105171.

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Orientador: Jose Fernando Durigan<br>Coorientador: Eduardo Sanches Stuchi<br>Banca: Ben-Hur Mattiuz<br>Banca: José Maria Monteiro Sigrist<br>Banca: Rogério Lopes Vieites<br>Banca: Juliana Sanchez<br>Resumo: Este trabalho teve como objetivo avaliar o potencial de conservação pós-colheita de tangerinas 'Fremont', 'Satsuma Okitsu' e 'Ponkan', utilizando-se diferentes temperaturas de armazenamento e atmosfera controlada. Avaliou-se também o desverdecimento de tangerinas 'Satsuma Okitsu' e 'Ponkan' com a utilização do ethephon (ácido 2-cloroetilfosfônico). Foram utilizados frutos recém colhidos em

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16

Wang, Mengyu. "Model-based Optimisation of Mixed Refrigerant LNG Processes." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17387.

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Natural gas liquefaction processes are energy and cost intensive. This thesis pursues the optimisation of propane precooled mixed refrigerant (C3MR) processes considering variations in upstream gas well conditions, in order to maximise gas well life. Four objective functions were selected for the design optimisation of the C3MR and dual mixed refrigerant (DMR) processes: 1) total shaft work (W), 2) total capital investment, 3) total annualised cost, and 4) total capital cost of both compressors and main cryogenic heat exchanger (MCHE). Optimisation results show that objective function 4 is mor

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17

Hollingshead, Kyle Brady. "SYNTHESIS OF A NEW GREEN REFRIGERANT: HFE-143." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192490.

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18

Mirza-Tolouee, Changiz M., and n/a. "Experimental study of zeotropic refrigerant mixture HFC-407C as a replacement for HCFC-22 in refrigeration and air-conditioning systems." Swinburne University of Technology, 2006. http://adt.lib.swin.edu.au./public/adt-VSWT20070416.141307.

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HCFC-22 is the world�s most widely used refrigerant. It serves in both residential and commercial applications, from small window units to large water chillers, and everything in between. Its particular combination of efficiency, capacity and pressure has made it a popular choice for equipment designers. Nevertheless, it does have some ODP, so international law set forth in the Montreal Protocol and its Copenhagen and Vienna amendments have put HCFC-22 on a phase out schedule. In developed countries, production of HCFC-22 will end no later than the year 2030. Zeotropic blend HFC-407C has been

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19

Stefanini, Thais França. "Aspectos fisiológicos do fruto de açaí sob armazenamento refrigerado." Universidade Federal de São Carlos, 2010. https://repositorio.ufscar.br/handle/ufscar/6982.

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Made available in DSpace on 2016-08-17T18:39:39Z (GMT). No. of bitstreams: 1 3799.pdf: 1110968 bytes, checksum: fdc0d899e0632e74031b01e08c48789a (MD5) Previous issue date: 2010-08-10<br>The açaí berry market has been increasing due to its high calorie characteristic and antioxidant activity, that contributes to diseases prevention. The market growth makes it the center of attention, upcoming the necessity to study its storage, transportation and processing chain. So this study has the objective to analyze the physiology and storage conditions of the açaí berry through measures of respiration

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20

Wright, Jeffery Raymond. "Recovery of refrigerant vapor leakage using high pressure psychrometrics." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17258.

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21

Al-Nizari, Hamdan Omar A. "Dynamic performance and refrigerant flow control in refrigeration systems." Thesis, Brunel University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315452.

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OLIVEIRA, Rodrigo Arruda de. "Antioxidante na viabilidade do sêmen equino congelado e refrigerado." Universidade Federal de Goiás, 2011. http://repositorio.bc.ufg.br/tede/handle/tde/1113.

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Made available in DSpace on 2014-07-29T15:13:41Z (GMT). No. of bitstreams: 1 Tese Rodrigo Arruda de Oliveira - ciencia animal.pdf: 240323 bytes, checksum: 9271974d672bf2ee948422285040bd20 (MD5) Previous issue date: 2011-04-18<br>In the equine world is increasing the use of frozen semen and cooled due to the recent release of its use for most of breeders' associations. However, the fertility of frozen semen is still low and this hinders their widespread use. The objective was to evaluate the effect In vitro addition of glutathione on sperm concentrations in five of 12 stallions in different p

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23

Leister, Tim. "Dynamics of rotors on refrigerant-lubricated gas foil bearings." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSEI010.

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La technologie du palier à feuilles (GFB) est l’un des facteurs clés pour la transition envisagée vers des machines tournantes sans huile dans les futurs moyens de transport. Outre les nombreux avantages en termes de taille, de poids, d’efficacité et de propreté, les GFBs offrent la possibilité unique d’être lubrifiés par des fluides de travail tels que les réfrigérants. Cependant, l’analyse numérique des systèmes GFB–rotor lubrifiés par réfrigérant représente un problème interdisciplinaire d’une énorme complexité et d’intérêts contradictoires entre des approches de modélisation et de résoluti

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Bardoulet, Laëtitia Véronique. "Non-adiabatic capillary tubes in high efficiency household refrigerator: an experimental study." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/113170.

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El tubo capilar con intercambio de calor líquido-succión (CT-LSHX) es un componente ampliamente utilizado en refrigeradores domésticos. Trabajos recientes han indicado que la entrada del tubo capilar era bifásica, aunque condiciones subenfriadas estaban medidas a la salida del condensador. El objetivo de esta tesis doctoral es examinar las condiciones reales a la entrada del tubo capilar de un refrigerador doméstico mediante el uso de un banco de pruebas innovador. Se instalaron tubos transparentes a la salida del condensador y a la entrada del tubo capilar con el fin de visualizar el flujo.

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25

Bonoli, Luca. "Evoluzione della qualità delle carni avicole durante la conservazione refrigerata." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9327/.

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Lo studio ha lo scopo di valutare e confrontare l'efficienza del packaging in “LID” con atmosfera modificata a confronto con il confezionamento più tradizionale in “stretch” con atmosfera ordinaria, sulla shelf-life di diversi prodotti avicoli quali petti e sovracosce di pollo e fese di tacchino. A tal fine sui prodotti diversamente confezionati sono state valutate le variazioni di alcuni parametri qualitativi analizzando e confrontando alcuni aspetti tecnologici (pH, colore, texture, capacità di ritenzione idrica) durante un periodo di stoccaggio di 15 giorni in diverse condizioni di refrige

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Colella, Simona. "Evoluzione della qualita delle carni avicole durante la conservazione refrigerata." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9951/.

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Il presente lavoro di tesi ha avuto lo scopo di valutare l’influenza della marinatura su alcuni aspetti microbiologici e chimico-fisici correlati alla qualità della carne di petto di pollo confezionata sottovuoto durante un periodo di stoccaggio di 14 giorni in condizioni refrigerate. Dalle analisi microbiologiche, è emerso che, nonostante l’aumento di pH dovuto all’azione alcalinizzante del bicarbonato, la shelf-life del prodotto marinato è rimasta invariata rispetto al gruppo di controllo non-marinato ed è stata pari a circa 14 giorni. Dal punto di vista tecnologico, gli ingredienti funzio

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27

Manoel, Luciana [UNESP]. "Qualidade e conservação de banana nanica irradiada, climatizada e refrigerada." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/101704.

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Made available in DSpace on 2014-06-11T19:31:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-12-15Bitstream added on 2014-06-13T21:02:48Z : No. of bitstreams: 1 manoel_l_dr_botfca.pdf: 2400210 bytes, checksum: 180fb3313efddc72cd992ab53fad4635 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Objetivou-se no primeiro experimento avaliar o uso da radiação gama, na dose de 0,4 kGy, na redução da temperatura de armazenamento da banana ‘Nanica’, enquanto que no segundo experimento avaliou-se a qualidade da banana ‘Nanica’ irradiada a 0,4 kGy e climatizada e

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28

Menegay, Peter. "Experimental investigation of an ejector as a refrigerant expansion engine." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10222009-124957/.

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29

Khan, Zulfiqar Ahmad. "Rolling contact wear of hybrid ceramic bearings with refrigerant lubrication." Thesis, Bournemouth University, 2006. http://eprints.bournemouth.ac.uk/10064/.

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Silicon nitride Si3N4 bearing elements have shown practical advantages over traditional steel elements due to their mechanical and physical properties. Leading technology and demands for high efficiency have caused loading bearing contacts in all kinds of machinery to be subjected to high speeds, high contact stresses and severe conditions of lubrication. In addition the introduction of a new generation of hydrocarbon refrigerants in various systems, where these rolling contact silicon nitride bearing elements are employed raises further demands to evaluate the rolling contact fatigue performa

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30

Leelananda, Rajapaksha Kankanamge. "Performance evaluation of reversible heat pumps when using refrigerant mixtures." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408666.

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31

Sishtla, Vishnu Mohan. "Analysis and testing of refrigerant lubricated bearings for centrifugal compressors." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397671.

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32

Pasek, Ari Darmawan. "Pool boiling on porous surfaces in cryogenic and refrigerant liquids." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315511.

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33

Eames, I. W. "A theoretical and experimental study of a novel refrigerant compressor." Thesis, Cranfield University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237726.

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34

Mendonça, Rafael de Assunção Brito. "Características de sémen canino refrigerado: comparação entre três diluidores diferentes." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2010. http://hdl.handle.net/10400.5/2209.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>A conservação de sémen e inseminação artificial em cães tem vindo a ser uma prática crescente nos últimos anos. Com a selecção de linhagens de cães para trabalho, desporto e beleza, as trocas de material genético internacionalmente são inevitáveis. A refrigeração de sémen, para inseminação posterior, é o método mais prático e económico de realizar este intercâmbio. No processo de conservação de sémen é imprescindível a adição de diluidores, e um dos componentes mais utilizados, devido às suas características, é a gema de ovo. N

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Schwantes, Josiani Marochio. "Processamento mínimo, fisiologia e conservação refrigerada de genótipos de tomate." Universidade Federal de Viçosa, 2008. http://locus.ufv.br/handle/123456789/4300.

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Made available in DSpace on 2015-03-26T13:36:37Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1316896 bytes, checksum: 78d0e7e529325c1fb43cef3913f21394 (MD5) Previous issue date: 2008-06-28<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The purpose of this work was to evaluate the physiological characteristics of ripening and to describe the potential conservation of fresh-cut Firme and Alambra mutant tomatoes (long life), in relation to Santa Clara (normal) and F1 (Firme x Santa Clara) tomatoes. Fruits were harvested at ripening stage 4 and kept for 15 days at 12 ºC,

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Manoel, Luciana 1975. "Qualidade e conservação de banana nanica irradiada, climatizada e refrigerada /." Botucatu : [s.n.], 2008. http://hdl.handle.net/11449/101704.

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Orientador: Rogério Lopes Vieites<br>Banca: Regina Marta Evangelista<br>Banca: Magali Conceição Monteiro da Silva<br>Banca: José Maria Monteiro Sigrist<br>Banca: Luciana Costa Lima<br>Resumo: Objetivou-se no primeiro experimento avaliar o uso da radiação gama, na dose de 0,4 kGy, na redução da temperatura de armazenamento da banana 'Nanica', enquanto que no segundo experimento avaliou-se a qualidade da banana 'Nanica' irradiada a 0,4 kGy e climatizada em diferentes horas após a colheita. No primeiro experimento as bananas 'Nanica' foram adquiridas na Fazenda Taperão, cidade de Brotas (SP), env

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DI, NICOLA Cristiano. "Proprietà termofisiche e prestazioni di refrigeranti a basso impatto ambientale." Doctoral thesis, Università Politecnica delle Marche, 2012. http://hdl.handle.net/11566/242038.

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L’attività di ricerca del dottorato si è incentrata sullo studio delle proprietà termofisiche e prestazioni di nuovi gas refrigeranti e loro miscele a basso impatto ambientale. Questo studio è stato effettuato con l’ausilio di tre differenti apparati sperimentali: l’apparato isocorico, l’apparato SLE e l’impianto frigorifero sperimentale operante con un ciclo in cascata. L’apparato isocorico consente di trovare i punti P-V-T di un gas o di una sua miscela sia nella regione bifasica che del vapore surriscaldato. L’utilizzo di due bagni termostatici con oli siliconici a differente viscosit

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Back, Izabelle, and Lars Dunberger. "Evaluating alternative refrigerants for the room air conditioner market." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173880.

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This study aimed to facilitate evaluation of alternative refrigerants for the air conditioner market. In order to achieve this target, two objectives were set. The first being the identification of alternative refrigerant with regard to regulations and trends. The second being enabling of thermodynamic evaluation of refrigerants for single components in air conditioners via design and installation of a test rig. A literature review was conducted to investigate the regulations, standards and trends for nine regions with high market shares. Furthermore, refrigerant substitutes for R410A and R22

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Vlček, Petr. "Aplikace přímého chlazení pro klimatizaci budov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225665.

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Diploma thesis deals with the problem of refrigerant cooling needs for air conditioning systems of buildings. Summary focuses on the theoretical basics and the physical nature of refrigeration and air conditioning technology. The consequences of split unite on microclimate in the room was experimentally tested and simultaneously investigated happenings associated to its activity. The aim is to unify the theoretical and experimentally obtained facts and apply them in the designing of air conditioning units. Design of air conditioning systems builds on my bachelor thesis, "Hot-air heating of gym

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Farrás, Marcel Cavalcanti [UNESP]. "Avaliação da fragmentação do DNA espermático de sêmen refrigerado de garanhões." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/98144.

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Made available in DSpace on 2014-06-11T19:29:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-26Bitstream added on 2014-06-13T18:58:50Z : No. of bitstreams: 1 farras_mc_me_botfmvz.pdf: 544796 bytes, checksum: 513d0af00d97f12c80a9d388b7fd8f78 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Nas últimas décadas, muitos estudos têm sido realizados nas diferentes espécies com o intuito de se determinar os fatores envolvidos no processo da fragmentação do DNA espermático. A biologia molecular voltada à área da reprodução tem resultado em inúmeras técnicas para

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Chen, De-Kang. "Flashing flow of refrigerant HFC-134a through a diabatic capillary tube." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25924.pdf.

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O'Loughlin, R. L. "Optimal design of organic refrigerant reverse cycle absorption air conditioning systems /." Title page, contents and abstract only, 1986. http://web4.library.adelaide.edu.au/theses/09ENS/09enso52.pdf.

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Alshatti, Rashid Ali. "Analyses of Variable Refrigerant Flow and Exergy in Air Conditioning Systems." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/2983.

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This thesis consists of two research problems in the air conditioning (A/C) area. For the first problem, the aim is to model and simulate a variable refrigerant flow (VRF) air conditioning system. The coefficient of performance (COP) for refrigeration or heat pump system is one of the critical parameters for designing an air conditioning system. The modeling of the system components for a VRF cycle under different cooling conditions using R-134a and R-22 as refrigerants was carried out. Calculations were performed by varying different parameters such as condenser and evaporator temperatures, a

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Milkie, Jeffrey A. "Condensation of hydrocarbon and zeotropic hydrocarbon/refrigerant mixtures in horizontal tubes." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51825.

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An experimental investigation of condensation of hydrocarbons and hydrocarbon/refrigerant mixtures in horizontal tubes was conducted. Heat transfer coefficients and frictional pressure drops during condensation of a zeotropic binary mixture of R245fa and n-pentane in a 7.75 mm internal diameter round tube were measured across the entire vapor-liquid dome, for mass fluxes ranging from 150 to 600 kg m-2 s-1, and reduced pressures ranging from 0.06 to 0.23. Condensation experiments were conducted for the mixture, as well as its pure constituents over a similar range of conditions. In addition, co

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Chen, Jiu Fa. "Optimization of vapour compression air conditioner/heat pumps using refrigerant mixtures." Thesis, University of Leeds, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343629.

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Wicoff, Paul. "Application and design of air-to-air variable refrigerant flow systems." Kansas State University, 2010. http://hdl.handle.net/2097/6816.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Julia A. Keen<br>This report addresses the operation, use, and design of air-to-air variable refrigerant flow systems, also known as VRF. Relatively new to the United States, these HVAC systems have potential to reduce energy consumption and utility costs in the correct applications. Although useful in many applications, the best building types for VRF are those requiring a large number of zones and with low ventilation air requirements. The report explains design and system selection considerations and

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Baltazar, Camila. "Qualidade do bacalhau salgado seco comercializado em temperatura ambiente e refrigerado." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/10/10134/tde-22042013-153811/.

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O comércio varejista brasileiro expõe o bacalhau salgado seco inteiro ou porcionado sem refrigeração. Esta condição, tradicionalmente aceita pelos consumidores, contraria as especificações do fabricante de manter o produto sob refrigeração, o que frequentemente gera conflitos entre as autoridades sanitárias e o comércio. Perante este fato, o presente estudo avaliou parâmetros microbiológicos e físico-químicos de 56 amostras de bacalhau obtidas no município de São Paulo, armazenadas sob refrigeração (0 a 5ºC) e em temperatura ambiente (20ºC a 25ºC), nos tempos zero, sete e 14 dias de armazename

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Farrás, Marcel Cavalcanti. "Avaliação da fragmentação do DNA espermático de sêmen refrigerado de garanhões /." Botucatu, 2012. http://hdl.handle.net/11449/98144.

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Orientador: Marco Antônio Alvarenga<br>Banca: Rubens Paes de Arruda<br>Banca: José Antonio Dell Acqua Junior<br>Resumo: Nas últimas décadas, muitos estudos têm sido realizados nas diferentes espécies com o intuito de se determinar os fatores envolvidos no processo da fragmentação do DNA espermático. A biologia molecular voltada à área da reprodução tem resultado em inúmeras técnicas para a avaliação da qualidade da cromatina e determinação da fragmentação do DNA espermático. Em trabalhos recentes, um novo teste denominado Halomax® tem se mostrado tão eficiente quanto a outros tradicionais para

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Penino, Nicolas Cazales. "Butafosfan e vitamina B12 no sêmen fresco e refrigerado de garanhões." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/83490.

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O objetivo deste estudo foi avaliar o efeito da utilização da associação do butafosfan e da vitamina B12 (Catosal B12®) na qualidade do sêmen fresco e refrigerado de garanhões. Foram utilizados quatro garanhões divididos aleatoriamente em dois grupos, A e B, cada um com dois garanhões. Um dos grupos serviu como controle e o outro como grupo tratado. Como tratamento utilizaram-se duas aplicações intramusculares de 5 ml /100 kg PV de Catosal por semana. O projeto se dividiu em 4 etapas de 84 dias cada uma. Na primeira etapa o grupo A foi tratado enquanto que o grupo B serviu de controle. Na segu

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Hussen, Muaz Bedru. "STUDY OF A SMALL-SCALE COOLING SYSTEM BASED ON AN ICE-STORAGE AND A DC-POWERED VAPOUR COMPRESSION REFRIGERATION UNIT TO IMPLEMENT SOLAR ENERGY IN REMOTE AREAS." Doctoral thesis, Universitat Rovira i Virgili, 2020. http://hdl.handle.net/10803/670597.

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La refrigeració manté la qualitat sensorial del productes i minimitza la pèrdua en les cadenes de valor del fred. Les àrees remotes dels països en desenvolupament es caracteritzen principalment pels baixos nivells de tecnologia, accés limitat a la xarxa elèctrica i el predomini de les petites explotacions agrícoles com un desafiament. El principal objectiu d'aquesta tesi és desenvolupar i caracteritzar un sistema de refrigeració modular multipropòsit basat en l'emmagatzematge de gel per a aplicacions de petita escala. El sistema d'emmagatzematge de gel va utilitzar un equip de refrigeració am

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