heat transfer coefficient for rotary cooler

Heat transfer in the rotary ash cooler with residual char

2012年2月1日  The PCHEE-A and PCHEE-K can increase the heat transfer area and heat transfer coefficient, through extending specific area to 1000–2000 m 2 /m 3 and inducing

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On the Measurement and Modeling of the Heat Transfer Coefficient

This paper addresses the heat transfer coefficient (HTC) associated with the hollow-shaft rotor cooling of a traction motor. In such a hollow-shaft cooling system, the coolant is made to flow

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Heat-Transfer Model of the Rotary Ash Cooler Used in ...

2010年3月30日  Although the rotary ash cooler is now popularly equipped with the CFB boilers, its heat-transfer characteristics have not yet been thoroughly studied. In the rotary ash cooler,

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Heat-Transfer Model of the Rotary Ash Cooler Used in

2010年3月30日  The new model was further applied to predict the heat-transfer characteristics for a rotary ash cooler used in a commercial 300 MWe CFB boiler. It was found that the heat

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Research of heat transfer model in rotary ash coolers

2011年5月1日  By analyzing the flow and heat transfer process of ash particles in a rotary ash cooler with fins, a one-dimensional heat transfer model was proposed, in which the reburning

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Simulation the Heat Flow Field in Cooler of Rotary Calcining Kiln

Then the convection heat transfer coefficient is calculated on the theory of heat transfer. On the simulation analysis of the heat transfer of the cooler based on the Flotran of ANSYS, the

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Scale-up of heat transfer in a rotary drum equipped with

2023年11月1日  Through a heat transfer coefficient (HTC), they characterized the effect of process parameters on heat transfer. In their study, they found that increasing rotational speed

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Volumetric Heat Transfer Coefficient in Rotary Dryers and Coolers

2009年10月21日  Heat transfer between air and particles in rotary dryers and coolers is analyzed with some assumptions. As a result, the relation is derived between the effective number of

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A Study of Rotary-Heat Exchanger with Air Flow across The

In the present paper, we report the heat transfer characteristics of it as a heater and a cooler. The experiments as a heater have been done using with several kinds of rotors that differ in shape.

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Research of heat transfer model in rotary ash coolers

2011年5月1日  By analyzing the flow and heat transfer process of ash particles in a rotary ash cooler with fins, a one-dimensional heat transfer model was proposed, in which the reburning of residual carbon in ...

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Volumetric Heat Transfer Coefficient in Rotary Dryers and Coolers

1975年1月1日  Article on Volumetric Heat Transfer Coefficient in Rotary Dryers and Coolers, published in KAGAKU KOGAKU RONBUNSHU 1 on 1975-01-01 by Hisashi Shinohara+1. Read the article Volumetric Heat Transfer Coefficient in Rotary Dryers and Coolers on R Discovery, your go-to avenue for effective literature search.

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Heat-Transfer Model of the Rotary Ash Cooler Used in ...

2010年3月30日  Heat-Transfer Model of the Rotary Ash Cooler Used in Circulating Fluidized-Bed Boilers Wei Wang, Xiaodong Si, Hairui Yang,* Hai Zhang, and Junfu Lu Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, People’s Republic of China Received

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Cooling temperature and heat transfer coefficients in

2022年1月21日  dependence of the heat transfer coefficient as a function of heat flow for different fluids, including water as the working fluid. Davletshin [13] performs optical measurements showing the behavior of the heat transfer coefficient in the separation region. The heat transfer coefficients in plate exchangers are

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Heat and Mass Transfer Coefficient and Pressure Drop

1990年1月1日  In this paper heat and mass transfer processes in evaporative fluid coolers are discussed. A new mathematical model of evaporative fluid cooling with countercurrent air flow is presented.

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Scale-up of heat transfer in a rotary drum equipped with

2023年11月1日  Rotary drums are commonly used in industry for mixing, heating, cooling, reacting, calcining and drying solids. Industries that use rotary drums include the chemical, metallurgical, minerals, ceramics, cement, polymers, food, fertilizer, waste treatment, pharmaceuticals, and catalyst industries. ... Wall-to-solid heat transfer coefficient in ...

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Design of Cooling Systems for Rotary Engines calculation

2024年5月11日  Tags: Design of Cooling Systems for Rotary Engines Heat Transfer Cooling Systems Calculation of Heat Transfer Coefficient. ... What factors affect the heat exchanger area required for a rotary engine cooling system? A: The heat exchanger area required is influenced by factors such as the heat to be removed, ...

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On the Measurement and Modeling of the Heat Transfer Coefficient

2018年7月27日  This paper addresses the heat transfer coefficient (HTC) associated with the hollow-shaft rotor cooling of a traction motor. In such a hollow-shaft cooling system, the coolant is made to flow ...

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Heat-Transfer Model of the Rotary Ash Cooler Used in

2010年3月30日  Rotary ash coolers are widely used in circulating fluidized-bed (CFB) boilers for bottom ash cooling, attributed to their high efficiency and excellent reliability. However, they are mostly still designed empirically, and one of the most important reasons is due to the lack of an appropriate heat-transfer model. In this paper, a comprehensive heat-transfer model was

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Heat Exchangers - Overall Heat Transfer Coefficients

2024年9月26日  Overall heat transfer coefficients in common heat exchanger designs - tubular, plate or spiral. ... Air-cooled heat exchangers: Cooling of water: 600 - 750: 100 - 130: Cooling of liquid light hydrocarbons: 400 - 550: 70 - 95: Cooling of tar: 30 - 60: 5 -

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CFD MODELING OF A CEMENT KILN WITH MULTI

2014年5月15日  Cooling zone Figure-2: Zone wise heat transfer coefficient for cement rotary kiln Table 1- Heat of reactions during Clinker formation General view of dry process rotary cement kiln Burner Material Flue gas Flue gases to Precalciner Primary air (70 - 80 C) Secondary air from cooler Secondary air from cooler (1000 °C) Cooling zone Sintering zone

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On the Measurement and Modeling of the Heat Transfer Coefficient

This paper addresses the heat transfer coefficient (HTC) associated with the hollow-shaft rotor cooling of a traction motor. In such a hollow-shaft cooling system, the coolant is made to flow through the shaft hole in order to cool the rotor. The HTC is estimated using computational fluid dynamics (CFD), where the effect of rotational velocity as well as the coolant flow rate has

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Heat Transfer in Rotary Drums Via Conduction, Convection,

3 天之前  Rotary drums are often used for granular processing including milling, heating, cooling, mixing, granulation, and more. However, heat transfer in rotary drums can be inefficient, leading to wasted energy. Valuable resources can be saved by developing more accurate models for the heat transfer in rotary drum applications to granular processing.

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Heat transfer in a rotary heat exchanger - ScienceDirect

1974年9月1日  The temperature profiles show a marked inflexion point which is due to the following fact: the energy loss to the surroundings is proportional Heat transfer in a rotary heat exchanger Table 1 Heat-transfer Solid charge Gas phase coefficients c. = 0"2 Wh/kgK co

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Modeling for heat transfer coefficient in indirect-heating tube rotary ...

2013年7月15日  Heat transfer coefficient is one of the most crucial parameters in thermal calculation and design for a tube rotary dryer. The dimension, structure and operating parameters of a suitably designed ...

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Convective Heat Transfer Coefficients Table Chart

The following table charts of typical convective convection heat transfer coefficients for fluids and specific applications. Membership Services. Related Resources: heat transfer. ... Coolers (no phase change) heat transfer coefficients. Cold Fluid : Hot Fluid : Overall U (BTU/hr-ft 2-F) Water : Water : 150 – 300 : Water : Organic solvent ...

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Simulation the Heat Flow Field in Cooler of Rotary Calcining Kiln

Then the convection heat transfer coefficient is calculated on the theory of heat transfer. On the simulation analysis of the heat transfer of the cooler based on the Flotran of ANSYS, the distribution of temperature in cooler is given. The results show that the surface temperature drops to 450 O C, after which it gradually rise until maturity ...

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Heat transfer in the rotary ash cooler with residual char

2012年2月1日  In this paper, an improved heat transfer model of the rotary ash cooler (RAC) used in CFB boilers has been developed with the consideration of the residual char combustion. Based on the analysis, the shrinking sphere model was selected to describe the residual char combustion. ... It has been observed that the heat transfer coefficient varies ...

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Hyper-reduced-order model for estimating convection heat transfer ...

The convection heat transfer coefficients for the other surfaces that experience natural convection heat transfer are small (0.015 mWmm −2 °C −1 under full load operation [40]), and they are given in advance. ... Convective cooling optimization of a blade for a supercritical steam turbine. Int. J. Heat Mass Transf., 55 (2012), pp. 4511 ...

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International Journal of Heat and Mass Transfer - ScienceDirect

1985年8月1日  Design theory for rotary heat and mass exchangers—I. Wave analysis of rotary heat and mass exchangers with infinite transfer coefficients Theorie de dimensionnement des echangeurs rotatifs de chaleur et de masse—I. Analyse ondulatoire des exchangeurs rotatifs avec des coefficients de transfert infinis Auslegungstheorie für rotierende wärme- und

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