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Heat Transfer in Scraped Surface Heat Exchangers
Chemie Ingenieur Technik, 2014AbstractAn den Wänden geschabte Apparate werden großtechnisch häufig als Wärmetauscher für Systeme mit Feststoffbildungen oder hohen Viskositäten eingesetzt. Bei geringen Länge/Durchmesser‐Verhältnissen hat dabei die Rückvermischung einen maßgeblichen Einfluss auf den prozessseitigen Wärmetransport.
Jörg Hillmann, Peter Walzel
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Transactions of the American Society of Mechanical Engineers, 1929
Abstract In view of the dearth of reliable data on the emissivity coefficients of various surfaces at the lower temperatures met with in refrigeration and heat-insulation work, the author undertook on investigation of the subject at Mellon Institute of Industrial Research, Pittsburgh.
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Abstract In view of the dearth of reliable data on the emissivity coefficients of various surfaces at the lower temperatures met with in refrigeration and heat-insulation work, the author undertook on investigation of the subject at Mellon Institute of Industrial Research, Pittsburgh.
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Heat recovery without heat transfer surfaces
Journal of Heat Recovery Systems, 1983Abstract Most heat recovery systems involve heat transfer surfaces. This fact means high initial investment, high maintenance costs and efficiency decrease because of the fouling of the heat transfer surfaces. This article describes the working principles of a surface-less heat recovery system, the mathematical approach to treat such systems and ...
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Heat transfer over a stretching surface with variable surface heat flux
Journal of Physics D: Applied Physics, 1998Heat transfer over a stretching surface with variable surface heat flux and uniform surface heat flux subject to injection and suction is examined. The boundary layer equations are transformed to ordinary differential equations, containing an injection parameter I, velocity exponent parameter M, heat flux exponent parameter and Prandtl number .
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Surface-Heating Greenhouses: Microeconomics
Transactions of the ASAE, 1982ABSTRACT THE principal of surface heating is to apply a blanket of warm water, such as that produced by electric power plants, over the outside surface of a greenhouse to reduce the heating energy costs of the greenhouse. A mathematical greenhouse heating model was used to predict the annual heating energy consumption of a 4000 m^ glass greenhouse with
null P. N. Walker +2 more
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SCRAPED SURFACE HEAT EXCHANGERS
Journal of Food Process Engineering, 1986ABSTRACTIn this literature survey flow patterns, mixing effects, heat transfer and power required for rotation in scraped surface heat exchangers (SSHE) are thoroughly discussed, with the emphasis on assumptions and results, while the principal design of different SSHEs are only briefly discussed.The flow patterns control the desired radial mixing and ...
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Anomalous Surface Heating Rates
Journal of Applied Physics, 1966Metals, semiconductors, and insulators, when exposed to the high irradiance produced by an arc image furnace, appear hot much sooner than predicted by heat theory. For an irradiance of 1500 W/cm2, the surface of the samples tested reached a temperature of 2000°K or more in a few milliseconds whereas the mathematical theory of heat conduction suggests ...
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1990
In the last chapter, induction was used for heating large masses of metal, where the aim was a uniform temperature throughout. There, the possible high in tensity of induction heating was limited by the rate at which the heat could be conducted away from the surface. Surface hardening makes use of this 'disadvantage'.
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In the last chapter, induction was used for heating large masses of metal, where the aim was a uniform temperature throughout. There, the possible high in tensity of induction heating was limited by the rate at which the heat could be conducted away from the surface. Surface hardening makes use of this 'disadvantage'.
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Surface Heat Treatment and Surface Engineering
2004Postupci modificiranja površine čelika (Opće prednosti ; Površinsko kaljenje ugrijavanjem plamenom ; Površinsko kaljenje indukcijskim ugrijavanjem ; Modifikacija površine pomoću LASER-skog snopa ; Fizikalne osnove toplinske obrade laserom ; Provedba površinske toplinske obrade laserom ; Postupak toplinske obrade laserskim snopom ; Ispitivanje svojstava
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