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Practical Heat Transfer

 

ISBN 1-56700-216-1

Price: $236.00  


Pratical Heat Transfer / CHAPTER 8 - AIR COOLED HEAT EXCHANGERS
Table of contents: Price: Add to cart
CHAPTER 8 - AIR COOLED HEAT EXCHANGERS $54.00
8.1 INTRODUCTION
8.2 DESCRIPTION AND TERMINOLOGY
8.3 SUITABILITY FOR AIR COOLING
8.3.1 Options Available for Cooling
8.3.1.1 General
8.3.1.2 Direct contact cooling
8.3.1.3 Use of raw water on a ‘once through’ basis
8.3.1.4 Indirect cooling with a secondary coolant
8.3.1.5 Cooling water from an evaporative cooling tower
8.3.1.6 Cooling water from a dry cooling tower
8.3.1.7 Cooling water from an air cooled heat exchanger
8.3.1.8 Direct cooling in an air cooled heat exchanger
8.3.2 Choice of Cooling System
8.3.2.1 Economic factors
8.3.2.2 Process considerations
8.3.2.3 Layout
8.3.2.4 Site conditions
8.3.2.5 Noise
8.3.2.6 Ambient conditions
8.4 SPECIFICATION OF AN AIR COOLED HEAT EXCHANGER
8.4.1 General
8.4.2 Thermal Duty and Design Margins
8.4.3 Process Pressure Drop
8.4.4 Design Ambient Conditions
8.4.4.1 Dry bulb air temperature
8.4.4.2 Altitude
8.4.5 Process Physical Properties
8.4.6 Mechanical Design Constraints
8.4.6.1 Standard specifications
8.4.6.2 Materials of construction
8.4.6.3 Fintube type
8.4.6.4 Tubing dimensions
8.4.6.5 Temperature limitations
8.4.6.6 Airside design clearances
8.4.6.7 Noise
8.4.6.8 Fan characteristics
8.4.6.9 Fan drives
8.4.6.10 Header types
8.4.7 Arrangement
8.4.8 Air Side Fouling
8.4.9 Economic Factors in Design
8.5 CONTROL
8.5.1 Control of the Process Fluid
8.5.2 Control of the Air Flowrate
8.5.2.1 Changing motor speeds
8.5.2.2 Changing fan blade pitch angle
8.5.2.3 Louvres
8.5.3 Control of Air Temperature
8.5.4 Effect of Weather on ACHE Control
8.5.4.1 Air temperature
8.5.4.2 Rain
8.5.4.3 Wind
8.5.5 Combined Units
8.5.6 Natural Convection Performance
8.6 PRESSURE RELIEF
8.6.1 Assessment of Whether Relief is Necessary
8.6.2 Estimation of Heat Input
8.6.2.1 Wetted area
8.6.2.2 Heat input
8.6.3 Estimation of the Potential Required Relief Rate
8.6.4 If necessary consider means of reducing the heat input
8.7 ASSESSMENT OF OFFERS
8.7.1 General
8.7.2 Manual Checking of Designs
8.7.2.1 Mean temperature difference
8.7.2.2 Heat transfer rate
8.7.2.3 Process pressure drop
8.7.2.4 Fan power
8.7.2.5 Noise claims
8.7.3 Computer Assessment
8.7.3.1 Introduction
8.7.3.2 Process flow distribution
8.7.3.3 Air flow distribution
8.7.4 Bid Comparison
8.8 FOULING AND CORROSION
8.8.1 Fouling
8.8.2 Corrosion
8.8.2.1 Introduction
8.8.2.2 Protective coatings
8.8.2.3 Sacrificial tubes
8.9 PERFORMANCE TESTING
8.9.1 General
8.9.2 Preparation for Performance Measurements
8.9.3 Mechanical Checks
8.9.4 Process Flow Distribution
8.9.5 Air Side Measurements
8.9.5.1 Temperature
8.9.5.2 Air flow
8.9.5.3 Pressure measurements
8.9.5.4 Air humidity
8.9.6 Noise
8.10 AIR SIDE CLEANING
8.10.1 General
8.10.2 Methods of Cleaning
8.10.3 Results
8.10.4 Preferred Contractors
8.11 MECHANICAL MAINTENANCE
8.11.1 Fans
8.11.2 Fan Drives
8.11.3 Tubeside access
APPENDIX A8 - Preliminary Estimation of ACHE Size and Cost
A8.1 Basic Method
A8.1.1 Linear Heat Release Curves
A8.1.2 Non-linear Heat Release Curves
A8.1.3 Correction Factors
A8.2 Limitations and Accuracy
REFERENCES FOR CHAPTER 8
SYMBOLS USED IN CHAPTER 8



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