unsteady+state+steam+heat+exchanger+explicit+centered+difference+problem
Simulation of the thermal borehole resistance in groundwater filled borehole heat exchanger using CFD technique
... geothermal heat exchanger design and performance Master’s thesis, South Dakota State University, 1996 [6] Paul N.D., Remund C.P The effect of grout thermal conductivity on vertical geothermal heat exchanger ... heat flux value at the pipe wall is then used in simulations M7-12, which use a constant heat flux over the pipe wall Since steady -state conditions are used and M1 and M7 have the same mean heat ... both U-pipe legs acting as heat sources The heat transfer becomes radial after a distance out in the bedrock (rradial) This un-radial heat flow in the water changes the heat transfer compared to...
Ngày tải lên: 05/09/2013, 14:58
fundamentals of heat exchanger design
... Crossflow Heat Exchangers Multipass Heat Exchangers 603 604 604 605 9.2.1 9.2.2 9.3 Plate-Fin Heat Exchangers 605 617 Rating Problem Sizing Problem 631 9.3.1 9.3.2 9.3.3 9.3.4 9.4 Tube-Fin Heat Exchangers ... the Heat Exchanger Pressure Drop Assumptions for Pressure Drop Analysis 381 6.2.1 6.2.2 6.3 6.4 Extended Surface Heat Exchanger Pressure Drop 382 391 Plate-Fin Heat Exchangers Tube-Fin Heat Exchangers ... Most processes of heating, cooling, heat recovery, and heat rejection involve transfer of heat between two fluids Hence, two-fluid heat exchangers are the most common Threefluid heat exchangers are...
Ngày tải lên: 02/04/2014, 15:24
heat exchanger design handbook (1st issue), by e u schlunder
... Floating-Head Heat Exchanger, TEMA Type AJS, D Harris 4.4 MECHANICAL DESIGN: GENERAL FORMS OF HEAT EXCHANGERS 4.4.1 Mechanical Design of Air-Cooled Heat Exchangers, K V Shipes Mechanical Design of Plate Heat ... ^.-_,_ -T -^^T- _ e HEAT EXCHANGER DESIGN HANDBOOK / Contents Vlll 3.1 INTRODUCTION To HEAT EXCHANGER DESIGN 3.1.1 3.1.2 Fundamental Concepts, Kenneth J Bell Types of Heat Exchangers and Their ... Sizing of Shell-and-Tube Heat Exchangers, Kenneth J Bell 3.1.3 3.1.4 3.2 DOUBLE-PIPE HEAT EXCHANGERS 3.2.1 3.2.2 Introduction, A R Guy Applications of Double-Pipe Heat Exchangers, A R Guy Design...
Ngày tải lên: 02/04/2014, 15:25
Báo cáo hóa học: " Performance evaluation on an air-cooled heat exchanger for alumina nanofluid under laminar flow" pdf
... were used in single pipe heat transfer, microchannel heat sinks, plate heat exchangers, double-tube heat exchangers, or heated enclosures, and seldom used in air-cooled heat exchangers Since the ... difference and flow rate between the inlet and outlet Page of 11 Figure Construction of the rectangular tube in air-cooled heat exchanger of the liquid of heat exchanger The air-cooled heat exchanger ... overall heat transfer in multi-channel heat exchanger by alumina nanofluid J Alloy Compd 2010, 504S:385 Farajollahi B, Etemad SG, Hojjat M: Heat transfer of nanofluids in a shell and tube heat exchanger...
Ngày tải lên: 21/06/2014, 01:20
đề tài heat exchanger
... Heat Exchanger Phân loại Phân loại theo nguyên lý làm việc Phân loại theo sơ đồ chuyển động chất lỏng, với loại TBTĐN có vách ngăn Phân loại theo thời gian Phân loại theo công dụng Heat Exchanger ... trình Heat Exchanger Phân loại TBTĐN theo thời gian Thường phân loại: Thiêt bị liên tục (ví dụ bình ngưng, calorife) Thiết bị làm việc theo chu kỳ (nồi nấu, thiết bị sấy theo mẻ) Heat Exchanger ... xúc chất lỏng mặt toả nhiệt Quá trình TĐN không ổn định mặt trao đổi nhiệt có dao động nhiệt Heat Exchanger TBTĐN vách ngăn, loại TBTĐN có vách rắn ngăn cách chất lỏng nóng chất lỏng lạnh chất...
Ngày tải lên: 17/08/2014, 10:27
Steam heat tracing system
... thống gia nhiệt PlateCoil, ControTrace, Internal Coil cho bồn chứa, két chứa ControHeat: CSI cung cấp sản phẩm ControHeat – gia nhiệt cho van, bơm, thiết bị đo,…Áo gia nhiệt đúc khối hợp kim nhôm ... khoang đúc áp lực thép bon ControHeat thiết kế để gia nhiệt cho thành phần dải nhiệt độ từ 95 400oC Controls Southest, Inc Hệ thống gia nhiệt Áo gia nhiệt ControHeat sử dụng đa dạng với nhiều ... Kỳ, với doanh số hàng năm xấp xỉ 50 triệu USD CSI cung cấp hệ thống gia nhiệt (ControTrace, ControHeat có đăng kí độc quyền sản xuất) cho đường ống, bồn chứa, van thiết bị đo công nghiệp đường ống...
Ngày tải lên: 01/06/2015, 13:05
Experimental and numerical investigation to evaluate the performance of triangular finned tube heat exchanger
... distances for smooth tube heat exchanger Figure 16 Velocity contours of air side for smooth tube heat exchanger Figure 17 Velocity contours of water side for smooth tube heat exchanger ISSN 2076-2895 ... finned tube heat exchanger Figure 19 Velocity contours of air side for triangular finned tube heat exchanger Figure 20 Velocity contours of water side for triangular finned tube heat exchanger ... predicting both heat transfer and fluid flow in the present heat exchanger The heat transfer augmentation is apparent when adopting fins on outer surface of inner tube in present heat exchanger This...
Ngày tải lên: 20/11/2015, 14:05
A 1020 _ A 1020M _ 02 : Standard Specification for Steel Tubes, Carbon and Carbon Manganese, Fusion Welded, for Boiler, Superheater, Heat Exchanger and Condenser Applications
... produced from the same heat of steel When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and the same heat which are heat treated in the same ... When the final heat treatment is in a continuous furnace, a lot shall include all tubes of the same size and heat, heat treated in the same furnace, at the same temperature, time at heat, and furnace ... in a boiler or heat exchanger, tubes shall be capable of withstanding expanding and beading without showing cracks or flaws, or opening at the weld When properly manipulated, superheater tubes...
Ngày tải lên: 08/09/2016, 00:24
Tiêu chuẩn ASTM A 1012 – 02 Standard Specification for Seamless and Welded Ferritic, Austenitic and Duplex Alloy Steel Condenser and Heat Exchanger Tubes With Integral Fins
... feedwater heater tubes; ferritic/austenitic stainless steel; ferritic stainless steel; heat exchanger tube; high temperature applications; seamless steel tube; stainless steel tube; steel tube; superheater ... UNS designation 15.2.1.4 Tube dimensions (outside diameter and wall thickness) 15.2.1.5 Heat number 15.2.1.6 Heat analysis 15.2.1.7 Product analysis, when specified 15.2.1.8 Tensile properties 15.2.1.9 ... resulting from heat treatment after enhancing or bending is acceptable When the plain tube specification allows for a slight amount of oxidation on the surface resulting from heat treatment,...
Ngày tải lên: 08/09/2016, 00:38
Natural convection unsteady magnetohydrodynamic mass transfer flow past an infinite vertical porous plate in presence of suction and heat sink
... effect of heat sink/source parameter S on the velocity of the flow field Curves with S0 correspond to the presence of heat sink and heat source respectively in the flow field The heat source ... porous plate through a porous medium in presence of suction and heat source In the present problem, we analyze the natural convection unsteady magnetohydrodynamic mass transfer flow of a viscous ... presence of heat source/sink Na and Pop [10] explained the free convection flow past a vertical flat plate embedded in a saturated porous medium Takhar et al [11] discussed the unsteady flow and heat...
Ngày tải lên: 05/09/2013, 15:28
Báo cáo hóa học: " Enhancement of critical heat flux in nucleate boiling of nanofluids: a state-of-art review" pot
... two-phase heat transfer near the heater surface (for example, direct measurement of the time-dependent temperature and liquid-vapor phase distributions on the heater surface in high heat- flux ... critical heat flux International Journal of Heat and Mass Transfer 2010, 53:85-94 72 Tu JP, Dinh N: An experimental study of nanofluid boiling heat transfer 6th International Symposium on Heat Transfer; ... general effect of heater size from previous studies, the maximum CHF enhancements of aluminawater nanofluids on flat-plate heaters exclusively are plotted against the dimensionless heater size L’,...
Ngày tải lên: 21/06/2014, 03:20
báo cáo hóa học:" Research Article Variable Viscosity on Magnetohydrodynamic Fluid Flow and Heat Transfer over an Unsteady Stretching Surface with Hall Effect" pot
... moves along the unsteady stretching sheet causing θ to increase as shown in this figure Boundary Value Problems 17 Conclusion The problem of unsteady magnetohydrodynamic flow and heat transfer of ... on unsteady boundary layer mixed convection heat transfer problem from a vertical porous stretching surface embedded in porous medium Recently, Shateyi and Motsa 10 numerically investigated unsteady ... heat and mass transfer over an unsteady stretching surface with internal heat generation Abd El-Aziz analyzed the effect of radiation on heat and fluid flow over an unsteady stretching surface Mukhopadyay...
Ngày tải lên: 21/06/2014, 11:20
Báo cáo hóa học: " Research Article Arabic Handwritten Word Recognition Using HMMs with Explicit State Duration" pdf
... respectively, state transition probability matrix, output probability matrix, a total number of HMM states, a state duration probability vector, and initial state probability vector In HMM with explicit state ... implicit state duration (i.e., classical HMM) and HMM with explicit state duration Classical HMMs not allow explicit duration modeling (i.e., duration that the model can spend in some state) Indeed, ... this field in which HMMs with explicit state duration have been employed HIDDEN MARKOV MODELS (HMMS) AND STATE DURATION MODELING Before introducing the notion of explicit state modeling in HMMs, we...
Ngày tải lên: 22/06/2014, 06:20
![Báo cáo khoa học: " Ventilator-associated pneumonia using a heated humidifier or a heat and moisture exchanger: a randomized controlled trial [ISRCTN88724583]" ppsx](https://media.store123doc.com/images/document/2014_08/15/medium_yan1407871472.jpg)
Báo cáo khoa học: " Ventilator-associated pneumonia using a heated humidifier or a heat and moisture exchanger: a randomized controlled trial [ISRCTN88724583]" ppsx
... Universitario de Table Characteristics of the heat and moisture exchanger and heated humidifier groups of patients Heat and moisture exchanger group (n = 53) Heated humidifier group (n = 51) P value ... (VAP) for heat and moisture exchangers versus heated humidifiers, adjusted for the Acute Physiology and Chronic Health Evaluation II score Heat and moisture exchanger group (n = 53) Heated humidifier ... flora heated humidifiers (HHs) ated pneumonia using of patients remaining free of ventilator-associCumulative proportion heat and moisture exchangers (HMEs) versus ated pneumonia using heat and...
Ngày tải lên: 13/08/2014, 02:24
Study of full counting statistics in heat transport in transient and steady state and quantum fluctuation theorems
... 112 3.5 Cumulants of heat for product initial state for 1D linear chain113 3.6 Cumulants of heat for steady state initial state for 1D linear chain ... time contour for product initial state 88 3.3 The complex time contour for projected initial state 98 3.4 Cumulants of heat for projected initial state for 1D linear chain ... function for product initial state B Vacuum diagrams 220 224 C Details for the numerical calculation of cumulants of heat for projected and steady state initial state 227 D Solving Dyson equation...
Ngày tải lên: 08/09/2015, 19:39
