Download or read book Heat Transfer to Water in Turbulent Flow in Internally Heated Annuli written by Ralph P. Stein and published by . This book was released on 1955 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer and Pressure Drop in Annuli with Non uniform Internal Wall Temperatures in the Transition Flow Regime written by Dickson Daniel Ndenguma and published by . This book was released on 2017 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is common practice to design heat exchangers that are operated in either the laminar or the turbulent flow regime and not in the transition flow regime. This could mainly be due to a lack of knowledge on the behaviour in the transition flow regime for several reasons. However, due to factors such as design constraints, heat exchangers may indeed operate in the transition flow regime. An experimental study was conducted to determine the lower and upper Reynolds number limits of the transition flow regime, and the characteristics of the heat transfer coefficients and friction factors for annular passages with different geometric dimensions. The inner wall of the annular passage had different degrees of non-uniform temperature, while the outer wall was insulated. Both heated and cooled flow applications with water as fluid (cold fluid and hot fluid respectively) were investigated. The isothermal condition investigation was also conducted for pressure drop. Four horizontal concentric counter-flow tube-in-tube heat exchangers with conventional inlet geometries were considered to obtain the required data. The hydraulic diameters of the test sections were 26.2 mm, 23 mm, 20.2 mm and 17 mm, their respective annular diameter ratios were 0.327, 0.409, 0.386 and 0.483 and their length-to-hydraulic ratios were 193, 221, 251 and 299 respectively. The flow was both hydrodynamic and thermally developing. Test data of laminar, transition and turbulent flow regimes was collected. However, the transition flow regime was the main area of interest for this study. The transition flow regime was found to exhibit either mixed or forced convection types. Average heat transfer coefficients were obtained for both heating and cooling cases, while friction factors were obtained for heating, cooling and isothermal conditions. Uncertainties in the friction factor and Nusselt number were on average below 5.6% and 10.5%, respectively. The geometric size of the annular passage, degree of wall temperature uniformity and direction of the heat flux (heating and cooling cases of annular fluid) had a significant influence on the heat transfer coefficients, friction factors and Reynolds number span of the transition flow regime. New correlations for predicting the transition flow regime Reynolds number spans, Nusselt numbers and friction factors were developed for the transition flow regime and predicted most of the data to within +-10%.
Download or read book Turbulent Heat Transfer in Annuli at Large Diameter Ratios written by William Frank Unzicker and published by . This book was released on 1967 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer from the inner wall of an annulus to subcooled water in turbulent parallel flow was studied. The inner core of the annulus consisted of wires varying from 0.0019 to 0.0197 inch in diameter. The outer tube consisted of a 1.01 inch diameter glass tube 24 inches long. Diameter ratios therefore varied from 530:1 to 51:1. The water velocity varied from 1.8 to 13.5 feet per second. Rectified alternating current was supplied to the wires. The current, wire surface area, wire resistance, and bulk water temperature were measured and from this data the average convective heat transfer coefficient calculated. The heat transfer coefficient varied from 1840 to 4990 BTU /hr. ft2[superscript .]F for the 0.0197 inch diameter wire to 7210 to 13000 BTU /hr. ft. 2[superscript .]F for the 0.0019 inch diameter wire. The data agreed well with that of Mueller who had worked with air in annuli of large diameter ratios. The data correlated when plotted as N[subscript Nu]/N[subscript Prf]1[superscript /]3 versus N[subscript Re] when the equivalent diameter was based on experimentally determined radii of maximum velocity in turbulent annular flow. Over the range of operating conditions studied the heat transfer coefficients were considerably lower than predicted by the usual empirical equations.
Download or read book Heat Transfer and Pressure Drop in Eccentric Annuli written by Theodore Diskind and published by . This book was released on 1961 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1971 with total page 1378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Technical Note written by and published by . This book was released on 1963-08 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer with Turbulent Flow in Concentric and Eccentric Annuli with Constant and Variable Heat Flux written by Edward Yan Wood Leung and published by . This book was released on 1962 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer written by James M. Jacobs and published by . This book was released on 1957 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer and Fluid Flow written by James M. Jacobs and published by . This book was released on 1958 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 2519 annotated references to the unclassified report literature is presented. Subjects covered under heat transfer and fluid flow include radioinduced heating; boiling; boiler, evaporators, pump, and heat exchanger design; hydrodynamics; coolants and their properties; thermal and flow instrumentation; high temperature materials; thermal properties of materials; and thermal insulation. Subjects covered less completely include thermodynamics; aerodynamics; high temperature corrosion; corrosion specific to heat transfer systems; erosion; mass transfer; corrosion film formation and effects; coolant processing and radioactivity; radiation effects of heat transfer materials; and pertinent data of thermonuclear processes. Subject, report number availability, and author indexes are given.
Download or read book Research and Development Progress Report written by United States. Office of Saline Water and published by . This book was released on 1961 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bettis Technical Review written by and published by . This book was released on 1957-12 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TID written by and published by . This book was released on 19?? with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Choking Two phase Flow Literature Summary and Idealized Design Solutions for Hydrogen Nitrogen Oxygen and Refrigerants 12 and 11 written by R. V. Smith and published by . This book was released on 1963 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The literature summary presents a brief description and discussion of papers on choking, two-phase flow.The papers are arranged with respect to analysis methods and experimental systems.The ide * alized solutions utilize models intended to provide upper and lower limits for the actual flow cases.Charts are presented to provide for rapid determination of choking flow for the choking point condition and for Fanno and isentropic flow for the fluids H2, N2, O2, CCl2F2, CCl3F.A discussion of choking flow and relaxation phenomena is included.(Author).
Download or read book Heat Transfer written by Salim Newaz Kazi and published by BoD – Books on Demand. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the wake of energy crisis due to rapid growth of industries, the efficient heat transfer could play a vital role in energy saving. Industries, household equipment, transportation, offices, etc., all are dependent on heat exchanging equipment. Considering this, the book has incorporated different chapters on heat transfer phenomena, analytical and experimental heat transfer investigations, heat transfer enhancement and applications.
Download or read book Advances in Heat Transfer written by and published by Academic Press. This book was released on 1964-01-01 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heat Transfer
Download or read book Engineering Journal written by and published by . This book was released on 1971 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 7, no.7, July 1924, contains papers prepared by Canadian engineers for the first World power conference, July, 1924.
Download or read book Turbulent Flow and Heat Transfer in Annuli written by M. Ramchandani and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
