Energy Transfers by Convection /
Abdelhanine Benallou.
- 1 online resource
- Energy series. Energy engineering set ; volume 3 .
- Energy series (ISTE Ltd.). Energy engineering set ; v. 3. .
Includes bibliographical references and index.
Cover; Half-Title Page; Title Page; Copyright Page; Contents; Preface; Introduction; 1. Methods for Determining Convection Heat Transfer Coefficients; 1.1. Introduction; 1.2. Characterizing the motion of a fluid; 1.3. Transfer coefficients and flow regimes; 1.4. Using dimensional analysis; 1.4.1. Dimensionless numbers used in convection; 1.4.2. Dimensional analysis applications in convection; 1.5. Using correlations to calculate h; 1.5.1. Correlations for flows in forced convection; 1.5.2. Correlations for flows in natural convection; 2. Forced Convection inside Cylindrical Pipes 2.1. Introduction2.2. Correlations in laminar flow; 2.2.1. Reminders regarding laminar-flow characteristics inside a pipe; 2.2.2. Differential energy balance; 2.2.3. Illustration: transportation of phosphate slurry in a cylindrical pipe; 2.2.4. Correlations for laminar flow at pipe entrance; 2.3. Correlations in transition zone; 2.4. Correlations in turbulent flow; 2.4.1. Dittus-Boelter-McAdams relation; 2.4.2. Colburn-Seider-Tate relation; 2.4.3. Illustration: improving transfer by switching to turbulent flow; 2.4.4. Specific correlations in turbulent flow 2.4.5. Illustration: industrial-grade cylindrical pipe2.5. Dimensional correlations for air and water; 3. Forced Convection inside Non-cylindrical Pipes; 3.1. Introduction; 3.2. Concept of hydraulic diameter; 3.3. Hydraulic Nusselt and Reynolds numbers; 3.4. Correlations in established laminar flow; 3.4.1. Pipes with rectangular or square cross-sections in laminar flow; 3.4.2. Pipes presenting an elliptical cross-section in laminar flow; 3.4.3. Pipes presenting a triangular cross-section in laminar flow; 3.4.4. Illustration: air-conditioning duct design; 3.4.5. Annular pipes with laminar flow 3.5. Correlations in turbulent flow for non-cylindrical pipes3.5.1. Pipes with rectangular or square cross-sections in turbulent flow; 3.5.2. Pipes with elliptical or triangular cross-sections in turbulent flow; 3.5.3. Illustration: design imposes the flow regime; 3.5.4. Annular pipes in turbulent flow; 4. Forced Convection outside Pipes or around Objects; 4.1. Introduction; 4.2. Flow outside a cylindrical pipe; 4.3. Correlations for the stagnation region; 4.4. Correlations beyond the stagnation zone; 4.5. Forced convection outside non-cylindrical pipes 4.5.1. Pipes with a square cross-section area4.5.2. Pipes presenting an elliptical cross-section area; 4.5.3. Pipes presenting a hexagonal cross-section area; 4.6. Forced convection above a horizontal plate; 4.6.1. Plate at constant temperature; 4.6.2. Plate with constant flow density; 4.7. Forced convection around non-cylindrical objects; 4.7.1. Forced convection around a plane parallel to the flow; 4.7.2. Forced convection around a sphere; 4.8. Convective transfers between falling films and pipes; 4.8.1. Vertical tubes; 4.8.2. Horizontal tubes; 4.9. Forced convection in coiled pipes
Whether in a solar thermal power plant or at the heart of a nuclear reactor, convection is an important mode of energy transfer. This mode is unique; it obeys specific rules and correlations that constitute one of the bases of equipment-sizing equations. In addition to standard aspects of convention, this book examines transfers at very high temperatures where, in order to ensure the efficient transfer of energy for industrial applications, it is becoming necessary to use particular heat carriers, such as molten salts, liquid metals or nanofluids. With modern technologies, these situations are becoming more frequent, requiring appropriate consideration in design calculations. Energy Transfers by Convection also studies the sizing of electronic heat sinks used to ensure the dissipation of heat and thus the optimal operation of circuit boards used in telecommunications, audio equipment, avionics and computers.
9781119579090 1119579090 9781119476962 1119476968
Heat--Conduction. Heat--Transmission. Heat engineering. Renewable energy sources. TECHNOLOGY & ENGINEERING--Mechanical. Heat--Conduction. Heat engineering. Heat--Transmission. Renewable energy sources.