Vapor-liquid contacting in high gravitational fields offers prospects for significant reductions in the physical size, capital, and operating costs of packed towers. Pressure drops, power requirements, mass transfer coefficients and liquid residence time distributions are reported for a rotating bed separator. The beds studied were rigid, foamed aluminum, with specific surface areas ranging from 650 to 3000 m{sup 2}/m{sup 2}. Gravitational fields were varied from 50 to 300g.
{"title":"Operating characteristics of rotating beds","authors":"M. Keyvani, N. Gardner","doi":"10.2172/7279454","DOIUrl":"https://doi.org/10.2172/7279454","url":null,"abstract":"Vapor-liquid contacting in high gravitational fields offers prospects for significant reductions in the physical size, capital, and operating costs of packed towers. Pressure drops, power requirements, mass transfer coefficients and liquid residence time distributions are reported for a rotating bed separator. The beds studied were rigid, foamed aluminum, with specific surface areas ranging from 650 to 3000 m{sup 2}/m{sup 2}. Gravitational fields were varied from 50 to 300g.","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68234121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chemical reactions between two compounds located in different phases are often inhibited by the interface between the phases. The interface separates the reactants, preventing them from coming together in sufficiently high concentrations for the reaction to proceed. This can occur in liquid-liquid systems when the organic reagent is immiscible with the aqueous solution containing the inorganic reactant.
{"title":"Solid-liquid phase transfer catalysis","authors":"H. A. Yee, H. J. Palmer, Shaw H. Chen","doi":"10.1002/CHIN.198730355","DOIUrl":"https://doi.org/10.1002/CHIN.198730355","url":null,"abstract":"Chemical reactions between two compounds located in different phases are often inhibited by the interface between the phases. The interface separates the reactants, preventing them from coming together in sufficiently high concentrations for the reaction to proceed. This can occur in liquid-liquid systems when the organic reagent is immiscible with the aqueous solution containing the inorganic reactant.","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1987-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CHIN.198730355","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50862155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The author discusses the development of artificial intelligence (AI). He explains the basic elements of AI: Heuristic search, knowledge representation, AI languages and tools, Natural Language Processing, computer vision, expert systems and problem solving and planning.
{"title":"Introduction to Artificial Intelligence","authors":"Ashley Wu, Jeff Caddell, Charlene MacNeil","doi":"10.2514/6.1986-163","DOIUrl":"https://doi.org/10.2514/6.1986-163","url":null,"abstract":"The author discusses the development of artificial intelligence (AI). He explains the basic elements of AI: Heuristic search, knowledge representation, AI languages and tools, Natural Language Processing, computer vision, expert systems and problem solving and planning.","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1986-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2514/6.1986-163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69053821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heat transfer devices with moving parts implement phase changes to and from viscous Newtonian and nonNewtonian fluids. By combining certain principles of heat and mass transfer, hydrodynamics, and rheology, equations are developed for the design of these machines and the prediction of their performance. A numerical example illustrates the use of the derived equations. (auth)
{"title":"Mechanically Aided Heat Transfer","authors":"D. Kern, H. Karakas","doi":"10.21236/ada319151","DOIUrl":"https://doi.org/10.21236/ada319151","url":null,"abstract":"Heat transfer devices with moving parts implement phase changes to and from viscous Newtonian and nonNewtonian fluids. By combining certain principles of heat and mass transfer, hydrodynamics, and rheology, equations are developed for the design of these machines and the prediction of their performance. A numerical example illustrates the use of the derived equations. (auth)","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1959-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67987399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract : Local heat-transfer coefficients were studied in detail in the central baffle space between two segmental baffles in a tubular heat exchanger. Two baffle spacings and three flow rates were investigated. baffle spacings and three flow rates were investigated. Average overall Nusselt numbers determined from the measured local coefficients compare favorably with average Nusselt numbers measured by other workers. The data are presented in picture form which enabled the drawing up of a schematic diagram, of the flow pattern in the baffle space. The results indicate the presence of three flow zones between two baffles. The longitudinal-flow zone occurs in the baffle windows. The cross-flow zone and eddy-flow zone occur on the downstream and upstream sides of the baffle space respectively. Heat transfer rates were in general higher in the eddy-flow zone. The heat transfer rate varies along individual tubes from a maximum at the baffle to a minimum midway between the baffle. The minimum value is one-fourth to one-half the value at the baffle.
{"title":"Local Shell-Side Heat-Transfer Coefficients in the Vicinity of Segmental Baffles in Tubular Heat Exchangers,","authors":"M. S. Gurushankariah, J. Knudsen","doi":"10.21236/ada319140","DOIUrl":"https://doi.org/10.21236/ada319140","url":null,"abstract":"Abstract : Local heat-transfer coefficients were studied in detail in the central baffle space between two segmental baffles in a tubular heat exchanger. Two baffle spacings and three flow rates were investigated. baffle spacings and three flow rates were investigated. Average overall Nusselt numbers determined from the measured local coefficients compare favorably with average Nusselt numbers measured by other workers. The data are presented in picture form which enabled the drawing up of a schematic diagram, of the flow pattern in the baffle space. The results indicate the presence of three flow zones between two baffles. The longitudinal-flow zone occurs in the baffle windows. The cross-flow zone and eddy-flow zone occur on the downstream and upstream sides of the baffle space respectively. Heat transfer rates were in general higher in the eddy-flow zone. The heat transfer rate varies along individual tubes from a maximum at the baffle to a minimum midway between the baffle. The minimum value is one-fourth to one-half the value at the baffle.","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1958-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67987388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1955-01-01DOI: 10.1080/00966665.1955.10467674
A. G. Blasewitz, B. Judson
{"title":"Filtration of Radioactive Aerosols By Glass Fibers","authors":"A. G. Blasewitz, B. Judson","doi":"10.1080/00966665.1955.10467674","DOIUrl":"https://doi.org/10.1080/00966665.1955.10467674","url":null,"abstract":"","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1955-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00966665.1955.10467674","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59015498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1126/science.333.6039.133-f
J. Urquhart
This article offers suggestions for developing a more-personalized employee reward system, including how to catch them in the act of doing their job well.
这篇文章为建立一个更加个性化的员工奖励系统提供了一些建议，包括如何在他们做好工作的时候抓住他们。
{"title":"Caught in the act","authors":"J. Urquhart","doi":"10.1126/science.333.6039.133-f","DOIUrl":"https://doi.org/10.1126/science.333.6039.133-f","url":null,"abstract":"This article offers suggestions for developing a more-personalized employee reward system, including how to catch them in the act of doing their job well.","PeriodicalId":9889,"journal":{"name":"Chemical Engineering Progress","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1126/science.333.6039.133-f","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64392239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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