Academic literature on the topic 'PURE REFRIGERANTS'
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Journal articles on the topic "PURE REFRIGERANTS"
Hsieh, Shou-Shing, and Chun-Jen Weng. "Nucleate Pool Boiling Heat Transfer Coefficients of Distilled Water (H2O) and R-134a/Oil Mixtures From Rib-Roughened Surfaces." Journal of Heat Transfer 119, no. 1 (February 1, 1997): 142–51. http://dx.doi.org/10.1115/1.2824079.
Full textLi, Hong. "Study on Alternative Refrigerants for Direct Expansion Solar Assisted Heat Pump System." Applied Mechanics and Materials 361-363 (August 2013): 267–70. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.267.
Full textChamra, L. M., and P. J. Mago. "Modelling of evaporation heat transfer of pure refrigerants and refrigerant mixtures in microfin tubes." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 221, no. 4 (April 1, 2007): 443–47. http://dx.doi.org/10.1243/0954406jmes131.
Full textWang, Qiang, Zhengyong Huang, Shucheng Ou, and Ruiqiang Zhang. "The Energy Storage Properties of Refrigerants (R170, R134a, R143a, and R152a) in Mof-5 Nanoparticles: A Molecular Simulation Approach." Materials 12, no. 21 (October 31, 2019): 3577. http://dx.doi.org/10.3390/ma12213577.
Full textYan, Fei, Qiang Wang, Shucheng Ou, Ruiqiang Zhang, and Guoqiang Wang. "Molecular simulation study for adsorption and thermal energy storage analysis of refrigerants (R170, R161, R152a, and R143a) mixed with UIO-67 nanoparticles." Modern Physics Letters B 34, no. 30 (August 3, 2020): 2050334. http://dx.doi.org/10.1142/s0217984920503340.
Full textSaleh, Bahaa, Ayman A. Aly, Mishal Alsehli, Ashraf Elfasakhany, and Mohamed M. Bassuoni. "Performance Analysis and Working Fluid Selection for Single and Two Stages Vapor Compression Refrigeration Cycles." Processes 8, no. 9 (August 20, 2020): 1017. http://dx.doi.org/10.3390/pr8091017.
Full textSoujoudi, Ray, and Randall Manteufel. "Thermodynamic performance of ammonia in liquefied natural gas precooling cycle." Thermal Science, no. 00 (2021): 72. http://dx.doi.org/10.2298/tsci201227072s.
Full textChamra, L. M., P. J. Mago, M.-O. Tan, and C.-C. Kung. "Modelling of evaporation and condensation pressure drop in microfin tubes." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 219, no. 1 (January 1, 2005): 61–70. http://dx.doi.org/10.1243/095440605x8306.
Full textMorales-Espejel, Guillermo E., Hans H. Wallin, Rudolf Hauleitner, and Magnus Arvidsson. "Progress in rolling bearing technology for refrigerant compressors." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 16 (August 21, 2017): 2948–61. http://dx.doi.org/10.1177/0954406217725772.
Full textHasheer, Shaik Mohammad, and Kolla Srinivas. "Performance Comparison of a Low GWP Refrigerants as Alternatives to R134a in a Refrigerator with and without Liquid-Suction Heat Exchanger." Materials Science Forum 969 (August 2019): 343–48. http://dx.doi.org/10.4028/www.scientific.net/msf.969.343.
Full textDissertations / Theses on the topic "PURE REFRIGERANTS"
Rabah, Ali A. "Flow boiling of pure refrigerants and binary refrigerant mixtures in a horizontal tube." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969263775.
Full textRabah, Ali A. [Verfasser]. "Flow boiling of pure refrigerants and binary refrigerant mixtures in a horizontal tube / Ali A Rabah." Aachen : Shaker, 2003. http://d-nb.info/1179039882/34.
Full textHassan, Mohamed Abdel-Rahman Mohamed. "Flow boiling of pure and oil contaminated carbon dioxide as refrigerant : with focus on heat transfer and pressure drop /." Online version, 2004. http://bibpurl.oclc.org/web/31435.
Full textFaverani, Leonardo Perez [UNESP]. "Estudo in vitro das alterações na superfície do titânio comercialmente puro e da liga de titânio Ti -6Al-4V submetida a diferentes tratamentos." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/88943.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação para o Desenvolvimento da UNESP (FUNDUNESP)
Proposição: Neste estudo nós investigamos o efeito dos peróxidos de carbamida a 16% e a 35%, peróxido de hidrogênio 35% e refrigerante de Cola, nas modificações da superfície do titânio comercialmente puro (Ti-cp) e liga Ti-6Al-4V. Materiais e Métodos: Setenta e dois discos de Ti (8 mm de diâmetro, 2 mm de espessura) foram utilizados e divididos em 18 grupos (n = 4) em função do tratamento das soluções e o tipo de Ti. Os espécimes foram mecanicamente polidos utilizando procedimentos metalográficos padrão. Os espécimes foram imersos em 3 ml de peróxido de carbamida a 16% e a 35%, em peróxido de hidrogênio 35% e ao refrigerante de Cola, 4 horas por dia (mantidos secos ou imersos em saliva artificial nas 20 horas restantes), durante 15 dias. Os espécimes do grupo controle foram imersos apenas em saliva artificial ao longo dos 15 dias. A rugosidade de superfícies e a topografia do Ti foram examinados por meio da microscopia de força atômica (AFM) e microscopia eletrônica de varredura (MEV). As modificações químicas das superfícies Ti foram avaliadas por meio da espectroscopia de energia dispersiva (EDS). Os dados foram analisados pela ANOVA de três fatores e o teste de Tukey foi utilizado como técnica post-hoc (α =.05). Resultados: Os grupos imersos em peróxido de hidrogênio 35% apresentaram a maior rugosidade (P <0,05), seguido pelos peróxidos de carbamida, com maiores valores para o Ticp, porém sem alterações quando associados ou não à saliva artificial. Estes valores foram estatisticamente superiores aos observados no início e no grupo controle. O refrigerante de Cola não alterou a rugosidade de superfície de ambos os tipos de Ti (P> 0,05). A MEV e a AFM mostraram maiores alterações...
Purpose: In this study we investigated the effect of 16% and 35% carbamide peroxides, 35% hydrogen peroxides and cola soft drink, on the surface modifications of commercially-pure titanium (cp-Ti) and Ti-6Al-4V alloy. Materials and Methods: Seventy-two Ti discs (8-mm diameter, 2-mm thickness) were used and divided into 18 groups (n=4) as a function of solution treatments and Ti type. Samples were mechanically polished using standard metallographic procedures. Samples were immersed into 3 ml of 16% and 35% carbamide peroxides, 35% hydrogen peroxide and cola soft drink at 4 hours per day (kept dried or immersed in artificial saliva in the remaining 20 hours) during 15 days. Control samples were immersed just in artificial saliva throughout the 15 days. Ti surfaces roughness and topography were examined using atomic force microscopy (AFM) and scanning electron microscopy (SEM). The chemical modifications of Ti surfaces were evaluated through energy dispersive spectroscopy (EDS). Data were analyzed by 3-way ANOVA, Tukey’s tests were further used as post-hoc techniques (α=.05). Results: Groups immersed in 35% hydrogen peroxide exhibited the greatest surface roughness (P<.05), followed by the carbamide peroxides regardless of Ti type and association or not with artificial saliva. Ticp exhibited greater surface roughness than Ti-6Al-4V alloy. These values were statistically higher than those observed at baseline and in control group. Cola soft drink did not change the surface roughness of both Ti types (P>.05). The SEM and AFM images of Ti surfaces showed higher surface changes for the samples immersed in 16% and 35% carbamide peroxides, and 35% hydrogen peroxide, with greater visible alteration for Ticp. These groups promoted the formation of crevices and pitting on the Ti surfaces. No detectable chemical... (Complete abstract click electronic access below)
Faverani, Leonardo Perez. "Estudo in vitro das alterações na superfície do titânio comercialmente puro e da liga de titânio Ti -6Al-4V submetida a diferentes tratamentos /." Araçatuba : [s.n.], 2012. http://hdl.handle.net/11449/88943.
Full textCoorientador: Valentim Adelino Ricardo Barão
Banca: Idelmo Rangel Garcia Júnior
Banca: Cláudio Maldonado Pastori
Resumo: Proposição: Neste estudo nós investigamos o efeito dos peróxidos de carbamida a 16% e a 35%, peróxido de hidrogênio 35% e refrigerante de Cola, nas modificações da superfície do titânio comercialmente puro (Ti-cp) e liga Ti-6Al-4V. Materiais e Métodos: Setenta e dois discos de Ti (8 mm de diâmetro, 2 mm de espessura) foram utilizados e divididos em 18 grupos (n = 4) em função do tratamento das soluções e o tipo de Ti. Os espécimes foram mecanicamente polidos utilizando procedimentos metalográficos padrão. Os espécimes foram imersos em 3 ml de peróxido de carbamida a 16% e a 35%, em peróxido de hidrogênio 35% e ao refrigerante de Cola, 4 horas por dia (mantidos secos ou imersos em saliva artificial nas 20 horas restantes), durante 15 dias. Os espécimes do grupo controle foram imersos apenas em saliva artificial ao longo dos 15 dias. A rugosidade de superfícies e a topografia do Ti foram examinados por meio da microscopia de força atômica (AFM) e microscopia eletrônica de varredura (MEV). As modificações químicas das superfícies Ti foram avaliadas por meio da espectroscopia de energia dispersiva (EDS). Os dados foram analisados pela ANOVA de três fatores e o teste de Tukey foi utilizado como técnica post-hoc (α =.05). Resultados: Os grupos imersos em peróxido de hidrogênio 35% apresentaram a maior rugosidade (P <0,05), seguido pelos peróxidos de carbamida, com maiores valores para o Ticp, porém sem alterações quando associados ou não à saliva artificial. Estes valores foram estatisticamente superiores aos observados no início e no grupo controle. O refrigerante de Cola não alterou a rugosidade de superfície de ambos os tipos de Ti (P> 0,05). A MEV e a AFM mostraram maiores alterações... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Purpose: In this study we investigated the effect of 16% and 35% carbamide peroxides, 35% hydrogen peroxides and cola soft drink, on the surface modifications of commercially-pure titanium (cp-Ti) and Ti-6Al-4V alloy. Materials and Methods: Seventy-two Ti discs (8-mm diameter, 2-mm thickness) were used and divided into 18 groups (n=4) as a function of solution treatments and Ti type. Samples were mechanically polished using standard metallographic procedures. Samples were immersed into 3 ml of 16% and 35% carbamide peroxides, 35% hydrogen peroxide and cola soft drink at 4 hours per day (kept dried or immersed in artificial saliva in the remaining 20 hours) during 15 days. Control samples were immersed just in artificial saliva throughout the 15 days. Ti surfaces roughness and topography were examined using atomic force microscopy (AFM) and scanning electron microscopy (SEM). The chemical modifications of Ti surfaces were evaluated through energy dispersive spectroscopy (EDS). Data were analyzed by 3-way ANOVA, Tukey's tests were further used as post-hoc techniques (α=.05). Results: Groups immersed in 35% hydrogen peroxide exhibited the greatest surface roughness (P<.05), followed by the carbamide peroxides regardless of Ti type and association or not with artificial saliva. Ticp exhibited greater surface roughness than Ti-6Al-4V alloy. These values were statistically higher than those observed at baseline and in control group. Cola soft drink did not change the surface roughness of both Ti types (P>.05). The SEM and AFM images of Ti surfaces showed higher surface changes for the samples immersed in 16% and 35% carbamide peroxides, and 35% hydrogen peroxide, with greater visible alteration for Ticp. These groups promoted the formation of crevices and pitting on the Ti surfaces. No detectable chemical... (Complete abstract click electronic access below)
Mestre
Rabah, Ali A. [Verfasser]. "Flow boiling of pure refrigerants and binary refrigerant mixtures in a horizontal tube / von Ali A. Rabah." 2003. http://nbn-resolving.de/urn:nbn:de:gbv:089-3662516277.
Full textSwanepoel, Wayne. "Wet compression versus dry compression in refrigeration cycles working with pure or non-azeotropic refrigerant mixtures for air-conditioners." Thesis, 2012. http://hdl.handle.net/10210/6097.
Full textWet compression versus dry compression in refrigeration cycles working with pure refrigerants or non-azeotropic mixtures is investigated in this paper. In total 34 pure refrigerants as well as 31 non-azeotropic binary mixtures are considered. This resulted in approximately 300 different mixtures being analysed. The pure refrigerants and refrigerant mixtures were analysed for one cooling application, namely that of spatial air conditioning at an evaporating temperature of 7°C, and a condensing temperature of 50°C. The investigation was conducted with cycle analyses calculating performances at different wet and dry compressor inlet values. Use was made of thermodynamic refrigerant properties calculated from a computer database. It was concluded that for both pure and non-azeotropic refrigerants analysed, all those with re-entrant saturation vapour lines produce better cooling COP's when the refrigerant is superheated before entering the compressor. Only a few of the refrigerants with bell-shaped T-s curves consistently produce higher cooling COP's when wet compression is used. However, their cooling capacities decreased while the compressor displacement rates increased. It was concluded that in general dry compression is more favourable than wet compression. From the exceptions that do exist, some manage to produce relatively high COP c 's while retaining competitive cooling capacities. A by-product of this study is that, from the vast amount of refrigerant mixtures analysed, valuable knowledge was gathered regarding refrigerants not commonly used in the applications considered.
Vorster, Paul Philip Jacobus. "Wet compression versus dry compression in heat pumps working with pure refrigerants or non-azeotropic mixtures for different heating applications." Thesis, 2012. http://hdl.handle.net/10210/7627.
Full textWet compression versus dry compression in heat pumps working with pure refrigerants or nonazeotropic mixtures is investigated in this paper. In total 34 pure refrigerants as well as 31 nonazeotropic binary mixtures at different concentrations are considered. This resulted in approximately 300 different mixtures being analysed. The pure refrigerants were analysed for three different heating applications found in practice: the heating of swimming pool water, heating air for interior space heating, and the heating of water for domestic use. The investigation was conducted with cycle analyses calculating performances at different wet and dry compressor inlet values. Use was made of thermodynamic refrigerant properties calculated from a computer database. It was concluded that for both pure and non-azeotropic refrigerants analysed, all those with re-entrant saturation vapour lines produce better heating COP's when the refrigerant is superheated before entering the compressor. Only a few of the refrigerants with bell-shaped T-s curves, consistently produce higher heating COP's when wet compression is used. However, their heating capacities decreased while the compressor displacement rates increased. It was concluded that in general dry compression is more favourable than wet compression. From the few exceptions that do exist, some manage to produce very high COPh's while retaining competitive heating capacities. A by-product of this study is that, from the vast amount of refrigerant mixtures analysed, valuable knowledge was gathered regarding refrigerants not commonly used in the applications considered
SANGADE, NIKHIL VASANT. "PERFORMANCE EVALUATION OF MULTI EVAPORATOR VAPOUR COMPRESSION REFRIGERATION SYSTEM WITH LIQUID-VAPOUR HEAT EXCHANGER AND FLASH CHAMBER USING ALTERNATIVE PURE REFRIGERANTS." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15374.
Full textKukreja, Rajeev. "Study of condensation characteristics of pure and mixtures of HFC refrigerants in horizontal tubes with micro-fins." Thesis, 2010. http://localhost:8080/iit/handle/2074/5247.
Full textBooks on the topic "PURE REFRIGERANTS"
International Institute of Refrigeration. Commission B1., ed. Propriétés thermophysiques des frigorigènes purs ou en mélange: Compte rendu de la réunion de la Commission B1 = Thermophysical properties of pure substances and mixtures for refrigeration : proceedings of the meeting of Commission B1, (March 5-7, 1990). Paris, France: Institut international du froid, 1990.
Find full textBook chapters on the topic "PURE REFRIGERANTS"
Meyer, J. P. "Evaluation of Energy Efficient and Environmentally Acceptable Pure and Zeotropic Refrigerants in Air-Conditioning and Refrigeration." In Energy and the Environment, 239–46. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4593-0_21.
Full textAl-Nadawi, Ayad Khudhair. "Distributed parameters modeling for heat exchangers using pure and zeotropic blend refrigerants." In Advanced Analytic and Control Techniques for Thermal Systems with Heat Exchangers, 49–129. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-819422-5.00003-7.
Full textSun, Z. H., M. Q. Gong, Y. F. Qi, E. C. Luo, and J. F. Wu. "Experimental investigation on pool boiling heat transfer of pure refrigerants and binary mixtures." In Proceedings of the Twentieth International Cryogenic Engineering Conference (ICEC20), 821–24. Elsevier, 2005. http://dx.doi.org/10.1016/b978-008044559-5/50197-6.
Full textKoyama, Sh, J. Yu, S. Momoki, T. Fujii, and H. Honda. "Forced Convective Flow Boiling Heat Transfer of Pure Refrigerants Inside a Horizontal Microfin Tube." In Convective Flow Boiling, 137–42. CRC Press, 2019. http://dx.doi.org/10.1201/9780367812089-16.
Full textGreco, Adriana. "Convective Boiling Heat Transfer of Pure and Mixed Refrigerants within Plain Horizontal Tubes: An Experimental Study." In Advances in Multiphase Flow and Heat Transfer (Volume 2), 216–303. BENTHAM SCIENCE PUBLISHERS, 2009. http://dx.doi.org/10.2174/978160805094910901010216.
Full textGreco, Adriana. "Convective Boiling Heat Transfer of Pure and Mixed Refrigerants within Plain Horizontal Tubes: An Experimental Study." In Advances in Multiphase Flow and Heat Transfer (Volume 2), 216–303. BENTHAM SCIENCE PUBLISHERS, 2012. http://dx.doi.org/10.2174/978160805094910902010216.
Full textLee, Inkyu, Kyungjae Tak, Wonsub Lim, Kwangho Choi,, and Il Moon. "Optimization of Pure-Refrigerant Cycle Compressing Ratio on C3-MR Process." In Computer Aided Chemical Engineering, 1472–76. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-444-59506-5.50125-5.
Full textSumardi, K., E. T. Berman, and M. Mutaufiq. "Performance investigation of an air-cooled chiller system using pure hydrocarbons as refrigerant." In Regionalization and Harmonization in TVET, 293–96. Routledge, 2017. http://dx.doi.org/10.1201/9781315166568-62.
Full textConference papers on the topic "PURE REFRIGERANTS"
Dalkilic¸, Ahmet Selim, and Somchai Wongwises. "Comparison of Various Alternative Refrigerants for Vapour Compression Refrigeration Systems." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44267.
Full textAvsec, Jurij, and Milan Marcic. "The calculation of the thermophysical properties for pure refrigerants and their mixtures." In 33rd Thermophysics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-3676.
Full textInoue, Norihiro, Masao Goto, and Satish G. Kandlikar. "Flow Boiling Heat Transfer With Binary and Ternary Mixtures in Microfin Tubes." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1275.
Full textField, Brandon S., and Pega Hrnjak. "Visualization of Two-Phase Refrigerant and Refrigerant-Oil Flow in a Microchannel." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43471.
Full textJung, Dongsoo, Chong-Bo Kim, Kil-Hong Song, and Jun-Kang Lee. "Pool Boiling Heat Transfer Coefficients of Alternative Refrigerants." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1014.
Full textGreco, Adriana, Rita Mastrullo, Alfonso W. Mauro, and Giuseppe P. Vanoli. "Two Phase Pressure Drops for Refrigerants: A Statistical Comparison Among Experimental Data and Correlations." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95817.
Full textRohlin, Peter. "Heat Transfer Coefficients of Zeotropic Refrigerant Mixtures and Their Pure Components in Horizontal Flow Boiling: An Experimental Study." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1011.
Full textXia, Jiaxi, Jiangfeng Wang, Pan Zhao, and Dai Yiping. "Performance Analysis and Comparison Study of Transcritical Power Cycles Using CO2-Based Mixtures as Working Fluids." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57132.
Full textTavakol, Mohsen, and Maziar Shafaee. "CFD Study on Supersonic Ejectors Used for Suction of Two Different Gases." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49577.
Full textGarcía-Valladares, O., C. D. Pérez-Segarra, and A. Oliva. "Numerical Simulation of Capillary-Tube Behaviour Working With Pure and Mixed Refrigerants Under Adiabatic and Non-Adiabatic Flow Conditions." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/htd-24220.
Full textReports on the topic "PURE REFRIGERANTS"
Ross, Howard D. An investigation of horizontal flow boiling of pure and mixed refrigerants. Gaithersburg, MD: National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.ir.86-3450.
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