POWER PLANT ACOUSTICS Episode 1 pot

... 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 of...

Ngày tải lên: 12/08/2014, 16:21

... various combinations of engine speed and power rating. 3 12

Ngày tải lên: 12/08/2014, 16:21

... 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 noise excess of 3 to 6 dB in the 12 5- to 10 00-HZ ... outdoor power plant noise at the base housing, the above analyses strongly suggest the need for a 5- to 10 -dB reduction of noise, with principal emphasis on noise control in the...

Ngày tải lên: 12/08/2014, 16:21

... studied for more than 50 reciprocating die- sel or natural-gas engines covering a power range of 16 0 to 7200 hp (11 5 to 515 0 kW). The speed range covered was 225 to 2600 rpm; the larger en- gines run ... follow immediately. a. Step 1, source data. (1) The sound power levels (PWLs) of the en- gine noise sources are given below in paragraphs 2–7 and 2–8. Sound pressure levels (SPLs) o...

Ngày tải lên: 12/08/2014, 16:21

... equation 3 1 below for the case of the sound pressure level out- Constant of the “receiving room”) becomes infinite. tity 10 log 1/ 4 is –6 dB. Thus, equation 3 1 is: L (3 -1) The sound power level ... enclosures. 2 10 CHAPTER 3 NOISE AND VIBRATION CONTROL FOR ENGINE INSTALLATIONS 3 -1. Engine noise control. There are essentially three types of noise problems that involve engines and...

Ngày tải lên: 12/08/2014, 16:21

... and the noise 4- 51

Ngày tải lên: 12/08/2014, 16:21

... . . . . . . . . . . . . . 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 (1) Tonal components. For casing ... cylinders with 15 - to 21- in. bores and 20- to 31- in. strokes. Fourteen different 2–3

Ngày tải lên: 13/02/2014, 23:20

... 16 . Design of Robust Power System Stabilizer in an interconnected Power System with Wind Power Penetrations 379 Sarjiya, Cuk Supriyadi A.N and Tumiran 17 . Wind Power Impact on Power ... designing of the power quality and EMC in the wind power system. In chapter 16 , a robust power system stabilizer is proposed to stabilize wind farm interconnected power...

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 ... Thus, for R = 660 ft. 2 (in the 31- Hz band), the REL SPL of figure 5 1 drops from about –8 dB at 3-ft. distance to about – 11 dB at 10 -ft. distance and...

Ngày tải lên: 27/06/2014, 23:20

... Chương 1. Giới thiệu PowerPoint 2 010 Trang1 Chương 1 Giới thiệu PowerPoint 2 010 Nội dung 1. Các điểm mới trong PowerPoint 2 010 2. Khởi động và thoát Microsoft PowerPoint 2 010 3. ... PowerPoint 2 010 15  Thoát PowerPoint 15  3. Tìm hiểu các thành phần trên cửa sổ chương trình Microsoft PowerPoint 16  4. Thay đổi kiểu hiển thị trong cửa sổ chương trình 19  Chương...

Ngày tải lên: 28/07/2014, 09:21