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Sổ tay tính toán cơ khí P11

Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 11 HEAT TRANSFER AND HEAT EXCHANGE Selecting Type of Heat Exchanger for a Specific Application 11.1 Shell-and-Tube Heat Exchanger Size 11.4 Boiler-Tube Steam-Generating Capacity 11.20 Heat Exchanger Actual Temperature Difference 11.6 Fouling Factors in Heat-Exchanger Sizing and Selection 11.8 Heat Transfer in Barometric and Jet Condensers 11.10 Selection of a Finned-Tube Heat Exchanger 11.12 Spiral-Type Heating-Coil Selection 11.15 Shell-and-Tube Heat Exchanger Design Analysis 11.21 Designing Spiral-Plate Heat Exchangers 11.37 Spiral-Tube Heat Exchanger Design 11.46 Heat-Transfer Design for Internal Steam Tracing of Pipelines 11.54 Designing Heat-Transfer Surfaces for External Heat Tracing of Pipelines 11.62 Sizing Electric Heaters for Industrial Use 11.16 Economizer Heat Transfer Coefficient 11.19 Air-Cooled Heat Exchangers: Preliminary Selection 11.67 Heat. | Source HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 11 HEAT TRANSFER AND HEAT EXCHANGE Selecting Type of Heat Exchanger for a Specific Application 11.1 Shell-and-Tube Heat Exchanger Size 11.4 Heat Exchanger Actual Temperature Difference 11.6 Fouling Factors in Heat-Exchanger Sizing and Selection 11.8 Heat Transfer in Barometric and Jet Condensers 11.10 Selection of a Finned-Tube Heat Exchanger 11.12 Spiral-Type Heating-Coil Selection 11.15 Sizing Electric Heaters for Industrial Use 11.16 Economizer Heat Transfer Coefficient 11.19 Boiler-Tube Steam-Generating Capacity 11.20 Shell-and-Tube Heat Exchanger Design Analysis 11.21 Designing Spiral-Plate Heat Exchangers 11.37 Spiral-Tube Heat Exchanger Design 11.46 Heat-Transfer Design for Internal Steam Tracing of Pipelines 11.54 Designing Heat-Transfer Surfaces for External Heat Tracing of Pipelines 11.62 Air-Cooled Heat Exchangers Preliminary Selection 11.67 Heat Exchangers Quick Design and Evaluation 11.70 SELECTING TYPE OF HEAT EXCHANGER FOR A SPECIFIC APPLICATION Determine the type of heat exchanger to use for each of the following applications 1 heating oil with steam 2 cooling internal combustion engine liquid coolant 3 evaporating a hot liquid. For each heater chosen specify the typical pressure range for which the heater is usually built and the typical range of the overall coefficient of heat transfer U. Calculation Procedure 1. Determine the heat-transfer process involved In a heat exchanger one or more of four processes may occur heating cooling boiling or condensing. Table 1 lists each of these four processes and shows the usual heat-transfer fluids involved. Thus the heat exchangers being considered here involve a oil heater heating vapor-liquid b internal-combustion engine coolant cooling gas-liquid c hot-liquid evaporation boiling liquid-liquid. 11.1 Downloaded from Digital Engineering Library @ McGraw-Hill www.digitalengineeringlibrary.com Copyright 2006 The McGraw-Hill Companies. All rights .