Power Plant Acoustics - index
Power Plant Acoustics - ufc_3_450_020001
Unified Facilities Criteria (UFC) - ufc_3_450_020002
Foreword - ufc_3_450_020003
List Tables - ufc_3_450_020007
List Figures - ufc_3_450_020008
Chapter 1 Scope Manual
Cross reference
Chapter 2 Sound Analysis Procedure
Sound level criteria.
Outdoor sound propagation
Objective
Table 2-1. Estimated Overall PWL for the Easing Noise of Diesel
Table 2-2. Frequency Adjustments (in dB) for Casing of Reciprocating Engines
Table 2-3. Estimated PWL for Turbocharge noise at air inlet Opening of Turbocharged Reciprocating engines
Table 2-4. Estimated PWL for Unmuffled Exhaust of Diesel
Table 2-.5 Overall PWLs of the Principal Noise Components of gas Turbine Engines
Table 2-6. Frequency Adjustments (in dB) for gas Turbing Engine Noise Source
Table 2-7. Approximate Noise Reduction of Gas Turbine Engine Casing Enclosures
Table 2-8. Approximate Directivity Effect (in dB) of a Large Exhaust Stack Compared
Data forms
Chapter 3 Noise and Vibration Contro for Engine Installations
Noise escape through an outdoor wall
Table 3-1. Reduction of Roof-Radiated Sound in the Horizontal Direction
Table 3-2. Approximate Insertion Loss (in db) of Typical Reactive Mufflers
Dissipative mufflers - ufc_3_450_020028
Table 3-3. Approximate Insertion loss (in dB) of 8-ft. long, 4-in-thick Parallel Baffles Separated
Table 3-5. Approximate Insertion Loss (in dB) of Varios lengths of 8-in-thick Parallel Baffles Separated
Table 3-7. Approximate Insertion Loss (in dB) of Varios lengths of 12-in-thick Parallel Baffles Separated
Figure 3-1 Shows types and Dimensions of Turn Configurations
Figure 3-1 Schematic Arrangement of "unlined" and "lined" Bends in Ducts or Passages
Table 3-10. Approximate Insertion Loss (in dB) of Various Lenghts of Commercial Duct Mufflers
Ventilation duct lining
Figure 3-2. Chart Showing Paragraph Nunber in Manual that Contains Vibration Isolation Recommendations
Upper-floor location
Vibration isolation of turbine engines
Nondisturbing warning and paging systems
Chapter 4 Examples of Sound Analysis Procedure
Sound level requirements
Figure 4-2. PWL of 3500-hp Diesel Engine in Engine Room No. 1 (DD From 2304)
Figure 4-3. PWL of 900-hp Diesel Engie Room No. 2 (DD From 2304)
Figure 4-3. PWL of 1600-hp Diesel Engie in Engine Room No. 2 (DD From 2304)
Room Constants
Figure 4-5. Room Constant for Engine Room No. 1 (DD From 2295)
Figure 4-6. Room Constant for Engine Room No. 2 (DD From 2295)
Table 4-1. Calculation of 3-ft. SPL of one Engine in Engine Room No. 1.
Figure 4-7. SPLs in Engine Room No. 1 Caused by Nearest Engine (DD From 2296)
The procedure of (b) above is somewhat tedious, although correct
Figure 4-7. SPLs in Engine Room No. 1 From Source PWL Data (DD From 2296)
The total SPLs at the Engine Room side of the Maintenance Shop
Figure 4-9. Summation of Engone Room SPLs on Wall to Maintenace Shop
Figure 4-10. SPLs in Engine Room No. 2 Caused by 900-hp Engine (DD Form 2296)
Figure 4-11. SPLs in Engine Room No. 2 Caused by 1600-hp Engine (DD Form 2296)
Figure 4-12. Summation of SPLs in Engine Room No.2 (DD From 2297)
Wall selection for Maintenance Shop
Figure 4-13. TL Requirement fo Noise From Engine Room No. 1 to Maintenance Shop (DD From 2298)
Figure 4-14. TL Requirement for Noise From Engine Room No. 2 to Maintenance Shop (DD From 2298)
Wall selection for Control Room
Figure 4-15. Room Constant Estimate for the Control Room (DD From 2295)
Figure 4-16. TL Requirement for Noise From Engine Room No. 1 to Control Room (DD From 2298)
Figure 4-17. TL Requirement for Noise From Engine Room No. 2 to Control Room (DD From 2298)
Noise levels to the offices
Figure 4-18. Room Constant for Corridor and Lobby Space (DD From 2295)
Figure 4-19. Room Constant for Office (DD From 2295)
Two alternative approaches are available for estimating the noise reduction from the Engine Room to the office
Figure 4-20. Sound Transmission From Engine Room No. 2 to Corridor (DD From 2299)
Figure 4-21. TL Requirement for Noise From Corridor to Office
The second possible approach to obtaining the office SPLs treats the corridor simply as a double wall
Figure 4-22. Sound Transmission Though Double Wall From Engine Room No. 2 to Office (DD From 2299)
Engine exhaust noise to on-base housing
Figure 4-23. Estimated Indoor SPLs of Power Plant Noise at base Housing (DD From 2302)
A CNR analysis should be carried out as a means of checking or confirming the expected reaction of the housed personnel to the power plant noise
Figure 4-24. Outdoor Power Plant Noise ot the Base Housing Plotted on CNR Grid
Total corrections
Figure 4-25. Engine Room vent Transmission to the Housing Area (DD From 2302)
Figure 4-26. Estimated PWL of Engine Noise From East Wall of Engine Room No. 2
Figure 4-27. Wall-Radiated Noise to the Base Housing (DD From 2302)
Engine noise escaping through the room should be checked in accordance with paragraph 3-2d
Figure 4-28. Roof-Raiated Noise to the Base Housing (DD From 2302)
Figure 4-29. Schematic Arrangement of Outdoor-Type Packaged Gas Turbine Generator Plant.
PWL criterion for noise to hospital
Figure 4-30. Elevation Profile Showing Wooded Area Between Power Plant and Hospital (DD From 2300)
Figure 4-31. Estimated Insertion Loss of Woods Shown in Figure 4-30 (DD From 2301)
Figure 4-32. Calculation of PWL Criterion, Mode by Using This Data from in Reserve Order (DD From 2302)
PWL of engine sources
Figure 4-22. Estimation of Engine Noise Source, First Without Specific Intake and Exhaust Muffler Details (DD From 2305)
Table 4-3. Summation of Tentative PWLs of the Three Engine Source and Comparison With the PWL Criterion of Figure 4-3
Table 4-4. Summation of PWLs of Engine Sources, Including Muffled Intake and Exhoust
Summary and conclusions
Appendix A Data Forms
Figure A-1. DD From 2304 (Estimated Sound Power Level of Diesel or Gas Reciprocating Engine Noise)
Figure A-2. DD From 2305 (Estimated Sound Power Level of Gas Turbine Engine Noise)
Appendix B References - ufc_3_450_020095
Appendix C Bibliography - ufc_3_450_020096
Power Plant Acoustics - ufc_3_450_020001
Unified Facilities Criteria (UFC) - ufc_3_450_020002
Foreword - ufc_3_450_020003
List Tables - ufc_3_450_020007
List Figures - ufc_3_450_020008
Chapter 1 Scope Manual
Cross reference
Chapter 2 Sound Analysis Procedure
Sound level criteria.
Outdoor sound propagation
Objective
Table 2-1. Estimated Overall PWL for the Easing Noise of Diesel
Table 2-2. Frequency Adjustments (in dB) for Casing of Reciprocating Engines
Table 2-3. Estimated PWL for Turbocharge noise at air inlet Opening of Turbocharged Reciprocating engines
Table 2-4. Estimated PWL for Unmuffled Exhaust of Diesel
Table 2-.5 Overall PWLs of the Principal Noise Components of gas Turbine Engines
Table 2-6. Frequency Adjustments (in dB) for gas Turbing Engine Noise Source
Table 2-7. Approximate Noise Reduction of Gas Turbine Engine Casing Enclosures
Table 2-8. Approximate Directivity Effect (in dB) of a Large Exhaust Stack Compared
Data forms
Chapter 3 Noise and Vibration Contro for Engine Installations
Noise escape through an outdoor wall
Table 3-1. Reduction of Roof-Radiated Sound in the Horizontal Direction
Table 3-2. Approximate Insertion Loss (in db) of Typical Reactive Mufflers
Dissipative mufflers - ufc_3_450_020028
Table 3-3. Approximate Insertion loss (in dB) of 8-ft. long, 4-in-thick Parallel Baffles Separated
Table 3-5. Approximate Insertion Loss (in dB) of Varios lengths of 8-in-thick Parallel Baffles Separated
Table 3-7. Approximate Insertion Loss (in dB) of Varios lengths of 12-in-thick Parallel Baffles Separated
Figure 3-1 Shows types and Dimensions of Turn Configurations
Figure 3-1 Schematic Arrangement of "unlined" and "lined" Bends in Ducts or Passages
Table 3-10. Approximate Insertion Loss (in dB) of Various Lenghts of Commercial Duct Mufflers
Ventilation duct lining
Figure 3-2. Chart Showing Paragraph Nunber in Manual that Contains Vibration Isolation Recommendations
Upper-floor location
Vibration isolation of turbine engines
Nondisturbing warning and paging systems
Chapter 4 Examples of Sound Analysis Procedure
Sound level requirements
Figure 4-2. PWL of 3500-hp Diesel Engine in Engine Room No. 1 (DD From 2304)
Figure 4-3. PWL of 900-hp Diesel Engie Room No. 2 (DD From 2304)
Figure 4-3. PWL of 1600-hp Diesel Engie in Engine Room No. 2 (DD From 2304)
Room Constants
Figure 4-5. Room Constant for Engine Room No. 1 (DD From 2295)
Figure 4-6. Room Constant for Engine Room No. 2 (DD From 2295)
Table 4-1. Calculation of 3-ft. SPL of one Engine in Engine Room No. 1.
Figure 4-7. SPLs in Engine Room No. 1 Caused by Nearest Engine (DD From 2296)
The procedure of (b) above is somewhat tedious, although correct
Figure 4-7. SPLs in Engine Room No. 1 From Source PWL Data (DD From 2296)
The total SPLs at the Engine Room side of the Maintenance Shop
Figure 4-9. Summation of Engone Room SPLs on Wall to Maintenace Shop
Figure 4-10. SPLs in Engine Room No. 2 Caused by 900-hp Engine (DD Form 2296)
Figure 4-11. SPLs in Engine Room No. 2 Caused by 1600-hp Engine (DD Form 2296)
Figure 4-12. Summation of SPLs in Engine Room No.2 (DD From 2297)
Wall selection for Maintenance Shop
Figure 4-13. TL Requirement fo Noise From Engine Room No. 1 to Maintenance Shop (DD From 2298)
Figure 4-14. TL Requirement for Noise From Engine Room No. 2 to Maintenance Shop (DD From 2298)
Wall selection for Control Room
Figure 4-15. Room Constant Estimate for the Control Room (DD From 2295)
Figure 4-16. TL Requirement for Noise From Engine Room No. 1 to Control Room (DD From 2298)
Figure 4-17. TL Requirement for Noise From Engine Room No. 2 to Control Room (DD From 2298)
Noise levels to the offices
Figure 4-18. Room Constant for Corridor and Lobby Space (DD From 2295)
Figure 4-19. Room Constant for Office (DD From 2295)
Two alternative approaches are available for estimating the noise reduction from the Engine Room to the office
Figure 4-20. Sound Transmission From Engine Room No. 2 to Corridor (DD From 2299)
Figure 4-21. TL Requirement for Noise From Corridor to Office
The second possible approach to obtaining the office SPLs treats the corridor simply as a double wall
Figure 4-22. Sound Transmission Though Double Wall From Engine Room No. 2 to Office (DD From 2299)
Engine exhaust noise to on-base housing
Figure 4-23. Estimated Indoor SPLs of Power Plant Noise at base Housing (DD From 2302)
A CNR analysis should be carried out as a means of checking or confirming the expected reaction of the housed personnel to the power plant noise
Figure 4-24. Outdoor Power Plant Noise ot the Base Housing Plotted on CNR Grid
Total corrections
Figure 4-25. Engine Room vent Transmission to the Housing Area (DD From 2302)
Figure 4-26. Estimated PWL of Engine Noise From East Wall of Engine Room No. 2
Figure 4-27. Wall-Radiated Noise to the Base Housing (DD From 2302)
Engine noise escaping through the room should be checked in accordance with paragraph 3-2d
Figure 4-28. Roof-Raiated Noise to the Base Housing (DD From 2302)
Figure 4-29. Schematic Arrangement of Outdoor-Type Packaged Gas Turbine Generator Plant.
PWL criterion for noise to hospital
Figure 4-30. Elevation Profile Showing Wooded Area Between Power Plant and Hospital (DD From 2300)
Figure 4-31. Estimated Insertion Loss of Woods Shown in Figure 4-30 (DD From 2301)
Figure 4-32. Calculation of PWL Criterion, Mode by Using This Data from in Reserve Order (DD From 2302)
PWL of engine sources
Figure 4-22. Estimation of Engine Noise Source, First Without Specific Intake and Exhaust Muffler Details (DD From 2305)
Table 4-3. Summation of Tentative PWLs of the Three Engine Source and Comparison With the PWL Criterion of Figure 4-3
Table 4-4. Summation of PWLs of Engine Sources, Including Muffled Intake and Exhoust
Summary and conclusions
Appendix A Data Forms
Figure A-1. DD From 2304 (Estimated Sound Power Level of Diesel or Gas Reciprocating Engine Noise)
Figure A-2. DD From 2305 (Estimated Sound Power Level of Gas Turbine Engine Noise)
Appendix B References - ufc_3_450_020095
Appendix C Bibliography - ufc_3_450_020096
