POWER PLANT ACOUSTICS Episode 9 potx

... building with the engine (or in a nearby building); and pow- er plant noise is disturbing to residential neighbors living near the plant. Noise control is directed to- ward meeting and solving ... the isolated assembly. — 3-14 ARMY TM 5-805-9 AIR FORCE AFM 88-20 NAVY NAVFAC DM-3.14 POWER PLANT ACOUSTICS DEPARTMENTS OF THE ARMY, THE AIR FORCE, AND THE NAVY DECEMBER 1983 duct mufflers...

Ngày tải lên: 13/02/2014, 23:20

... the exponential fit presented in figure 8. Note Variability of Wind and Wind Power 295 2. Classification of wind and wind power oscillations Oscillations due to wind speed variations can ... deviation (cNRMSE) of the wind power forecast error for 7800 MW of wind power Wind power forecast error Max. [MW] Min. [MW] 99 .7% Conf.Int. [MW] Sum PRPs +52...

Ngày tải lên: 20/06/2014, 12:20

... C-1 Page 1-1 1-1 1-1 1-2 2-1 2-1 2-2 2-2 2-2 2-3 2-3 2-8 2–13 2-13 3-1 3-2 3-3 3-4 3-12 3-12 3-15 3-15 3-15 3-16 3-16 4-1 4-1 4-43 4-52 i UFC 3-450-02 15 May 2003 UNIFIED FACILITIES CRITERIA (UFC) POWER PLANT ACOUSTICS APPROVED FOR ... radiated sound power the total PWL minus the table 3–1 values. is then out the flow...

Ngày tải lên: 27/06/2014, 23:20

... GlobalFree() and LocalFree(), actually perform virtu- ally identical functions. Because of their greater flexibility we will use GlobalAlloc() and GlobalFree() instead of new and delete or malloc and ... of formal methods of specifications. Therefore we settle for the lowest level of rigor, which we define as methodol - ogy for program development based on following a sequence of...

Ngày tải lên: 12/08/2014, 07:22

... C -1 Page 1- 1 1- 1 1- 1 1- 2 2 -1 2 -1 2-2 2-2 2-2 2-3 2-3 2-8 2 13 2 -13 3 -1 3-2 3-3 3-4 3 -12 3 -12 3 -15 3 -15 3 -15 3 -16 3 -16 4 -1 4 -1 4-43 4-52 i ARMY TM 5-805-9 AIR FORCE AFM 88-20 NAVY NAVFAC DM-3 .14 POWER ... by \1\ /1/ ) Change No. Date Location This UFC supersedes TM 5-805-9, dated 30 December 19 83. The format o...

Ngày tải lên: 12/08/2014, 16:21

... 3–8 of this manual. 2- 5. Indoor sound distribution. Sound from an indoor sound source spreads around 2- 2 TM 5–805-9/AFM 88 20 1NAVFAC DM–3.14 CHAPTER 2 SOUND ANALYSIS PROCEDURE 2- 1. Contents of ... source. 2- 1 Octave-band PWLs can be obtained by subtracting rections are different for the different engine speed the table 2 2 values from the overall PWL given groups. by table 2 l...

Ngày tải lên: 12/08/2014, 16:21

... is (from eq. 7-18 in the N&V manual) (3- 2) where A is the area of the radiating wall, in ft. 2 Equation 3 3 combines equations 3 1 and 3- 2: (3- 3) This equation must be used carefully. For ... used in engine-driven power plants. Re- fer to chapter 7 of the N&V manual for noise data on these sources. 2- 13 Since the directivity is also related to wavelength 3- 3. Reactive...

Ngày tải lên: 12/08/2014, 16:21

... category 4 or 5 area. Pad details are given in paragraph d(1) below. (3) For engines above 1200 rpm and under 40 0 hp. A concrete inertia block is not required for this 3–13 engine speed and power ... speed and power. b. On-grade location. The chart in figure 3–2 shows the paragraphs below that give recom- mended vibration isolation treatments for various combinations of engine speed...

Ngày tải lên: 12/08/2014, 16:21

... the power plant. This would reduce indoor SPLs but would not change the outdoor SPLs. If possible, other large buildings on the base could be used to shield the housing area from the power plant. ... control the noise. a. Description of power plant. In this example, a 15-MW plant is supplied by the manufacturer in a packaged form as shown in figure 4– 29. Item 13 shows an indoor...

Ngày tải lên: 12/08/2014, 16:21

... dense woods between the power plant and the hospital. The woods are about 500 ft. deep, and the trees are about 40 ft. high. The top of the exhaust stack of the power plant is about 30 ft. above ... Finally, Item 2 is the algebraic sum of Items 3 and 4. Thus, Item 2 represents the total PWL of the power plant sound that would just produce an NC–20 in- door criterion at the hospita...

Ngày tải lên: 12/08/2014, 16:21

... Plastics Materials, 6th edition, Butterworth-Heinemann, 199 6. J. M. C. Cowie, Polymers: Chemistry and Physics of Modern Materials, International Textbook Co., 197 3. C. Hall, Polymer Materials, ... Plastics Materials, 6th edition, Butterworth-Heinemann, 199 6. International Saechtling, Plastics Handbook, Hanser, 198 3. P. C. Powell and A. J. Ingen Honsz, Engineering with Polymers,...

Ngày tải lên: 13/08/2014, 05:20

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Ngày tải lên: 13/08/2014, 05:20

... not obtained in the molded or extruded resins because of the lack of ori- ented stretching. When nylon powder that has been precipitated from solution is pressed and sintered, the parts have high crys- tallinity ... known as dis- tilled red oil and saponified. They may be sold under trade names. Alcholein 810 is a clear, distilled red oil used for textile treating. Monoenoic acid is a modifie...

Ngày tải lên: 13/08/2014, 05:21

... number requires specialised instruments for tests and a careful and time consuming production process. The interesting point in the large tolerance for the surface errors in X-ray transmission lenses ... soft X-ray contact microscopy, or micromachining of polymers by direct photoetching. Grazing incidence X-ray optics can be used to collect the radiation in a wide wavelength...

Ngày tải lên: 13/08/2014, 05:22

... Lett., EDL-2, pp. 46 6-4 68 ( 199 0). [80] N. Kotani and S. Kawazu, ‘Computer analysis of punch-through in MOSFETs’, Solid-state Electron., 22, pp. 6 3-7 0 ( 197 9). ED-36, pp .96 3 -9 67 ( 198 9). ( 199 0). ... Masetti. ‘A .CAD-oriented analytical MOSFET model for 34 5-3 55 ( 197 8). 99 1 -9 97 ( 197 9). L_. high-accuracy applications’, IEEE Trans. Computer-Aided De...

Ngày tải lên: 13/08/2014, 05:22