types of fins in heat transfer pdf

... aiming at reducing thenumber of false negatives (failure to detect a buried mine) even at the cost of increasingthe false alarm rate of the system • To find a trade-off between the accuracy of ... V82: (a) Evolution of the error in the estimation ofα; (b) Evolution of thevalue ofα during the inverse problem procedure. Forμ=4.1, the discrepancy principle determines the stopping rule as,  y ... experimental setup in Fig 9, the results of the application of the quasi-inverse operatorare summarized in Table 3, showing the distribution of mine targets correctly detected and classified according to

Ngày tải lên: 19/06/2014, 10:20

... eliminating the interface at the joints, which in turn gives the parental metal strength. Because of the use of diffusion bonding, the expected lifetime of the heat Developments in Heat Transfer ... Developments in Heat Transfer 310 • Fins are generally not used in high temperature units because of suspended dirt particles that will foul and low available pressure drops. The advantage of fins ... Marbond heat exchanger is a type of compact heat exchanger based on a novel combination of photochemical etching and diffusion bonding (Phillips 1996). The internal construction of this heat exchanger

Ngày tải lên: 19/06/2014, 10:20

... Engineering, VVIT,Namburu, M.Srinivas Student, Department of Mechanical Engineering ,Lakireddy Bali Reddy college of Engineering, K.Ashok Reddy Student, Department of Mechanical Engineering, ... CONDITIONS IN PARABOLIC TROUGH SOLAR COLLECTOR K.Dilip Kumar Professor, Department of Mechanical Engineering, Lakireddy Bali Reddy college of Engineering, T.Srinivasa Rao Professor, Department of ... college of Engineering ABSTRACT The efficacy of a parabolic trough solar collector (PTSC) was improved by using TiO 2 /DI-H 2 O (De-Ionized water) nanofluid Working samples consisting of nanofluids

Ngày tải lên: 03/06/2020, 22:53

... role in influencing the heat transfer coefficient during working conditions An increase in heat flux significantly enhances nucleate boiling heat transfer, leading to a rise in the heat transfer ... coefficient of CO2 in microchannel heat exchangers Improving heat transfer efficiency involves various strategies, including minimizing heat loss to the environment, maintaining and replacing damaged ... of CO2 in a minichannel tube, International Journal of Refrigeration 36 (2013) 2040e2047.[06] Liang et al., Investigation of flow boiling heat transfer characteristics of CO2 in horizontal mini-tube,

Ngày tải lên: 19/07/2021, 09:37

... (Fig 1) Nature of Fluid Flow The nature of the flow in the U-duct is complicated In the following, the complexity ofthis flow is examined in a step-by-step manner, adding one complicating feature ... or pin fins to enhance heat transfer For efficiency, effective cooling mustbe accomplished with minimal cooling flow and pressure loss This need for efficiency is evenmore urgent for gas turbines ... to investigate the flow and heat transfer in arotating and a non-rotating U-duct with smooth and ribbed walls Wall functions will not beused The focus is to examine the nature of the flow induced

Ngày tải lên: 19/10/2022, 03:05

... combustion, heat transfer in liquid metal flows, human comfort in underground mining, heat transfer on electrical discharge machining, mixing convection are included in this book aiming ... increase achieved as function of the optical power injected for several... drying mechanisms, variable property effects in heat transfer, heat transfer in electronics and process industries, ... Treatment of Port Wine Stains 537 Dong Li, Ya-Ling He and Guo-Xiang Wang Chapter 28 Study of the Heat Transfer Effect in Moxibustion Practice 557 Chinlong Huang and Tony W. H. Sheu Chapter 29 Heat

Ngày tải lên: 19/06/2014, 10:20

... Effect of axial magnetic field on convective heat transfer In case of flow of liquid metals in heated channels under the influence of a uniform axial magnetic field shows a decrease of convective heat ... walls did not increase for the case with insulating walls as Trang 6in the case with conducting walls showing the contribution of the ‘M’ shaped velocity profile in the Nusselt number increase near ... in Nusselt number with increase in magnetic field is because of the reduction in turbulence quantified using turbulence kinetic energy as shown in figure 13 It was found that the turbulent kinetic

Ngày tải lên: 19/06/2014, 10:20

... more information is demonstrated on heat flow characteristics and heating performance of the radiant floor heating system in applying various kinds of control systems to comfort indoor heat and ... conductivity of pipe Kin, Thermal conductivity of insulator R1 and R2 Inside and outside diameter of pipe R3 Outside diameter of insulator The heat transfer coefficient of hot water inside the ... examined through using simulation model of radiant floor heating system and applying various kinds of automatic thermostatic valves First of all, In terms of proportional control and On-Off control,

Ngày tải lên: 19/06/2014, 10:20

... in Tissue Heat Transfer, Annals of the New York Academy of Sciences, Vol 3 35, pp 137– 150 , ISSN 0077-8923 Cho, Y.I (1992) Bioengineering Heat Transfer, In: Advances in Heat Transfer, ... 1. Introduction Heat transfer in living tissues is a complicated process because it involves a combination of thermal conduction in tissues, convection and perfusion of blood, and metabolic heat ... Developments in Heat Transfer 154 vasoconstriction. Then, the Simplified Thermoregulatory Bioheat (STB) model is introduced for evaluating heat transfer within the segments of the human body. Finally,

Ngày tải lên: 19/06/2014, 10:20

... aisle containment strategies Relying on air as the primary heat transfer medium in data centres is becoming increasingly problematical due to inexorable increases in power densities in IT equipment ... deployed in the process industries, this chapter focuses on one important heat transfer component of several industrial applications, namely the use of convective heat transfer from impinging air ... converting and baking industries typically use arrays of hot air impingement jets to transfer heat into products in order to, in the former cases, vaporise their solvent components, and in the

Ngày tải lên: 19/06/2014, 10:20

... (approximately 87 J/cm2) induces an increase of 43.2 °C in a remaining dentin thickness of 0.2 mm and induces an increment of 5.8 °C in a dentin thickness of 2.0 mm Considering that the human teeth ... study of the efficiency of heat engine and places constraints upon the direction of heat transfer and the attainable efficiencies of heat engines (Kondepudi & Prigogine, 1998) The concept of ... irreversible heat engines, respectively The efficiency of a reversible engine is defined as Inspired by Inequality (3), we define E Q T= 1( 1−T2) as the entransy gained by the heat engine from the

Ngày tải lên: 19/06/2014, 10:20

... value of heat transfer coefficient in steam... correct determining permits for the proper selection of heat transfer area during designing of heat exchangers and calculation of the ... without earlier indirect calculations of the overall heat transfer 3.1 Mathematical formulation of the inverse problem The issue consisting of simultaneous determining of the heat transfer ... determine heat transfer. .. the determination of the temperature and stress distributions at the wall crosssection including the inner and outer surfaces of the steam header using the inverse heat

Ngày tải lên: 19/06/2014, 10:20

... in cutting tools for turning and milling and the processes of high speed machining allow to machine harder materials than before, but EDM still remains the only available process for machining ... the machining zone Suction flushing of dielectric fluid is preferred... minimal effect on the material removal rate (MRR) EDM is gaining popularity due to the following reasons: Machining of Complex ... approximated the heat source by a point instead of a disk for conducting heat to the interior The point heat source can result in. .. is applied to the workpiece; it eliminates the mechanical

Ngày tải lên: 19/06/2014, 10:20

... found during machining of aluminum using a copper electrode 5 MRR increases sharply with increase in current In the present study, highest MRR was obtained during machining of aluminum using a brass ... doesn’t allow absorbing much of the heat energy and most of the heat is utilized in removal of material from aluminum workpiece of low melting point But during machining of steel using copper electrodes, ... those of brass 3 During machining of mild steel, electrodes undergo more wear than during machining of aluminum This is due to the fact that thermal conductivity of aluminum is higher to that of

Ngày tải lên: 19/06/2014, 10:20

... result, the determination of heat transfer coefficient of hydrate slurry is crucial for investigating the heat transfer in hydrate forming/dissociating processes under stirring or flowing Unfortunately, ... conductivities of different kinds of gas hydrates, including pure gas hydrates and hydrate-bearing sediments The achievements on mechanism and modeling of heat transfer occurring in the growth of hydrate ... explained The little peak of the heat flux in the beginning originates from the existence of the strong recirculation zone there Then the heat flux gets up continuously with the increasing intensity

Ngày tải lên: 19/06/2014, 10:20

... reaction in sodium heat pipe, pp.151-155, Proc of 6 th China Heat Pipe Conference,Wuyishan, China Jacobson D.L and Wang J.H.(1984) Failure Analysis of a Sodium, Inconel 617 Heat Pipe, Preprints of ... (1992) Heat Pipe Science, Advances in Heat Pipe Science and Technology, Proc of 8 th Int Heat Pipe Conference, pp.3-8, Bejing, Int Academic Publishers Zhang J.X and Ning X.W (2009) Study of Thermal ... Numerical Analysis of Leading Edge and Nosecap Heat Pipes, Advances in Heat Pipe Science and Technology, Int Academic Publishers, pp.303-308, Proc of 8 th Int Heat Pipe Conference, Bejing David E

Ngày tải lên: 19/06/2014, 10:20

... heat of the calf Cpa 1,009 J/kg ºC Specific heat of the air ρs 7,800 kg/m3 Density of the stainless steel hs 7.9 W/m2 ºC Heat transfer coefficient of the stainless steel hc 3.7 W/m2 ºC Heat transfer ... Bioheat transfer analysis of cryogen spray cooling during laser treatment of Port Wine Stains Lasers in Surgery and Medicine, Vol.26, No.2, (February 2000), pp 145-157, ISSN 0196-8092 Pickering, ... understood by considering the combined effect of the laser heating and heat conduction of the heated PWS to the neighbor colder dermis As the laser heating prolongs over a long pulse, the heat conduction

Ngày tải lên: 19/06/2014, 10:20

... Δtd, heat due to breaking of rocks with the use of explosives Δte, human metabolism Δth and thermal water Δtw as outlined in equation (1): With increasing mining depths, the influence of the ... mass (m/ºC) In order to obtain the mathematical model for the calculation of heat transfer of thermal properties of rock mass, use of the heat transfer formulation of gas flow in pipes can be ... temperature in Neves Corvo mine was maximum 24.5ºC in July, minimum 9.0ºC in January and mean being 15.6ºC and in San Rafel Trang 3mines was maximum temperature was 8.8ºC in November, minimum 4ºC in July

Ngày tải lên: 19/06/2014, 10:20

... latent heat storage of the sample does not change when heating/cooling cycle is repeated (less than 2 % of latent heat variation) Furthermore, melting and freezing transition points of the ... medium consisting of water containing small amounts of suspension agents and without using aqueous phase inhibitors of secondary nucleation or modifiers The initiator is dissolved in the monomer-PCM ... polymerization kinetic In the proper conditions the polymer reacts mainly in the interface... turbulent heat transfer characteristics in Pr=25 were reported for the first time Maximum heat transfer

Ngày tải lên: 19/06/2014, 10:20

... illustrated in Figure 1(b) Treating the problem of end heating is not much different than the above model for side heating The main difference is in defining the heat source as an exponentially decaying ... symmetrical side induction heaters, b) rod held by a heatsink along its length with end induction heater and c) end induction heated thin disk (dark) with a cap 2.1.1 Side heating The boundary ... Temperature in a rod: a) axial distribution for heat density of 410 W/cm3, b) radial distribution for heat density of 410 W/cm3, comparing rod with finite and infinite length and with the linear solution,

Ngày tải lên: 19/06/2014, 10:20