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ASME PTC 30 - 1991(R2021) Air Cooled Heat Exchangers, 1991
- Foreword
- Committee Roster
- CONTENTS
- 0 INTRODUCTION
- 1Object And Scope [Go to Page]
- 1.1 Object
- 1.2 Scope
- 1.3 Uncertainty
- 2 Definitionsand Description of Terms [Go to Page]
- 2.1 Terms
- 2.2 Letter Symbols
- 3 Guiding Principles [Go to Page]
- 3.1 General
- 3.2 Agreements Prior to Test
- 3.3 Selection of Personnel
- 3.4 Pre-Test Uncertainty Analysis
- 3.5 Arrangement of Test Apparatus
- 3.6 Methods of Operation During Testing
- 3.7 Provisions for Equipment Inspection
- 3.8 Calibration of Instruments
- 3.9 Preliminary Testing
- 3.10 Conduct of Test
- 3.11 Permissible and Nonpermissible Adjustments to Test Procedures
- 3.12 Duration of Test
- 3.13 Number of Test Readings
- 3.14 Permissible Limits of Test Parameters
- 3.15 Degree of Constancy of Test Conditions
- 3.16 Causes for Rejection of Test Readings or Results
- 3.17 Post-testuncertainty Analysis
- 4 Instruments and Methods of Measurement [Go to Page]
- 4.1 GENERAL
- 4.2 Measurement of Physical Dimensions
- 4.3 Fan Measurements
- 4.4 Measurement of Air Flow
- 4.5 Measurement Of Air-Side Pressure Differential
- 4.6 Measurement of Fan Driver Power
- 4.7 Measurement of Sound Level
- 4.8 Measurement of Atmospheric Pressure
- 4.9 Measurement of Environmental Effects
- 4.10 Measurement of Wind Velocity
- 4.11 Measurement of Air Temperatures
- 4.12 Measurement of Ambientand Entering Air Temperatures
- 4.13 Measurement of Exit Air Temperature
- 4.14 Measurement of Process Fluid Temperatures
- 4.15 Measurement of Process Fluid Pressures
- 4.16 Measurement of Process Fluid Flow Rate
- 4.17 Measurement of composition of Process Fluid
- 5 Computation of Results [Go to Page]
- 5.1 General
- 5.2 Review of Test Data and Test Conditions
- 5.3 Reduction of Test Data
- 5.4 Determination of Material and Heat Balances
- 5.5 Computation of Effective Mean Temperature Difference
- 5.6 Computation of Overall Heat Transfer Coefficient
- 5.7 Determination of Air-Side Pressure Losses
- 5.8 Determination of Process Fluid Pressure Losses
- 5.9 Adjustments of Test Data to Design Conditions
- 6 Report of Results [Go to Page]
- 6.1 Composition of Report
- 6.2 Report Data
- Figures [Go to Page]
- 4.1 Location of Air Velocity and Temperature Measurement Points Across Fan Ring
- 4.2 Typical Velocity Distribution Across Fan Stack
- 5.1 MeanTemperature Difference Relationships - Crossflow Unit - 1 Tube Row, Unmixed
- 5.2 Mean Temperature Difference Relationships Crossflow Unit - 2 Tube Rows, 1 Pass, Unmixed
- 5.3 Mean Temperature Difference Relationships Crossflow Unit - 3 Tube Rows, 1 Pass, Unmixed
- 5.4 Mean Temperature Difference Relationships Crossflow Unit - 4 Tube Rows, 1 Pass, Unmixed
- 5.5 Mean Temperature Difference Relationships Crossflow Unit - 2 Tube Rows, 2 Passes, Unmixed Between Passes
- 5.6 Mean Temperature Difference Relationships Crossflow Unit - 3 Tube Rows, 3 Passes,Unmixed Between Passes
- 5.7 Mean Temperature Difference Relationships Crossflow Unit - 4 Tube Rows, 4 Passes, Unmixed Between Passes
- 5.8 Mean Temperature Difference Relationships Crossflow Unit - 4 Tube Rows in 2 Passes, 2 Tube Rows Per Pass, Mixed at t
- 5.9 Schematic Of Process Fluid Piping
- 5.10 Fin Efficiency of Several Types of Straight Fins
- 5.11 Efficiency Curves for Four Types of Spine Fins
- 5.12 Efficiency of Annular Fins of Constant Thickness
- 5.13 Efficiency of Annular Fins With Constant Metal Area for Heatflow
- Tables [Go to Page]
- 4.1 Recommended Minimum Number of Air Velocity Measurement Points for Fan Ring Traverse
- 5.1 Values of Ftr for EQ. (5.38)
- Appendices [Go to Page]
- A - Testing Guidelines
- B - Example
- C - Example Uncertainty Analysis
- D - Special Considerations for Computation and Adjustment of Results
- E - Fouling
- F - Recirculation of Air
- G - References
- Figures [Go to Page]
- D.1 Moody-darcy Friction Factor Chart for Flow Through Plain Tubes
- D.2a Chart for Calculating In-Tube Heat Transfer Coefficients for Water
- D.2b Correction Factor To Fig. D.2a For Other Tube Diameters
- D.3 Two-phase Flow Friction Pressure Drop Correction Factor
- D.4 B A Function for wm for Thechaddock Method
- D.5 Colburn Correlation for Condensation on a Vertical Surface - No Vapor Shear
- Tables [Go to Page]
- C.1a Sensitivity Factors for Uncertainty Analysis
- C.1b Sensitivity Factors for Uncertainty Analysis
- C.2 Error Estimate Values for Capability
- C.3 Error Estimate Values for Capability
- C.4 Two-tailed STUDENT-t Table for The 95 Percent Confidence Level [Go to Page]
