tinh toan co khi duong day

Tài liệu Báo cáo "Tính toán điện dung đường dây 500 kV hai mạch có thứ tự pha ngược nhau " potx

...

TÍNH TOÁN CƠ KHÍ VÀ CÁC THIẾT BỊ PHỤ TRỢ

... ứng giữa vôi (CaO) và dolomit (CaCO3.MgCO3) với SO2 xảy ranhư sau:2CaO + 2 SO2 +O2  2CaSO42CaCO3.MgCO3 + 2SO2 + O2  2[CaSO4 + MgO] + 4CO 2 Phản ứng giữa vôi và SO2 ... niêm mạc đường khí quản. Khi tiếp xúc với mắt chúng có thể tạo thành axit. SOx có thể xâm nhập vào cơ thể con người qua các cơ quan hô hấphoặc các cơ quan tiêu hóa sau khi được hòa tan trong ... đốivới sức khoẻ con người, động thực vật, mà còn tác động lên các vật liệu xây dựng,các công trình kiến trúc, là một trong những chất gây ô nhiễm môi trường. Trong khíquyển, khí SO2 khi gặp các...

TÍNH TOÁN CƠ KHÍ VÀ CÁC THIẾT BỊ PHỤ TRỢ

Danh mục: Công nghệ - Môi trường

toàn bộ phần tính toán cơ khí đã chỉnhsửa

Danh mục: Vật lý

... [P]=KcEt(s-Ca)2cos2TNH ÁP SUẤT TÍNH TOÁN CHO PHÉP,[p]Tính chiều dài tính toán của đáy nón,L L=Chiều cao đáy nónTính đường kính tính toán của đáy nón Dαcos1,09,021 ttDDD+= Hay αcos1,09,021 ... trường Cb = 0 Hệ số bổ sung do sai lệch khi chế tạo và lắp ráp : C0 = 0.4 (mm)Hệ số quy tròn bầng 1.499 (mm)Do đó C = 1.5 + 0.4 + 1.499 = 3.399(mm) Khi đó S = S’ +C = 4 (mm)Bề dày thực của ... mnδη= =Choïn [δ]= Min ( [δk], [δch]) = 139.33 *106 ( N/m2)ã Be daứy thaựp ủửụùc tớnh theo co ng thửực :S=4,0..18,1tDELPDttTrong đó D là đường kính thân,mm.Pn là áp suất...

Sổ tay tính toán cơ khí P1 potx

Danh mục: Kĩ thuật Viễn thông

... 1.21FIGURE 11 Economic study plots for life-cycle costs (Power).Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. ... installed cost for the mechanicalchilling system for Case 2 is $3-million, or about $3,000,000/18,100 kWϭ$165.75/kW of added output. Again, costs come from contractor and staff studies.Raw-water consumption ... the plant’s overall O&M costs by $35/ h whenthe chiller is operating. Disposal of additional cooling-tower blowdown costs $17 /h. The compressor used in Case 2 consumes about 4 MW of auxiliary...

Sổ tay tính toán cơ khí P2 ppt

Danh mục: Kĩ thuật Viễn thông

... pressure in the condenser shell?Calculation Procedure:1. Sketch the condenser, showing ﬂow conditions(a) Figure 8 shows the condenser and the ﬂow conditions prevailing.2. Determine the condenser ... valid with constant inlet-water temperature and cooling-water ﬂow rate.It is useful in analyzing condenser operating conditions at other than full load.Single- or multiple-pass surface condensers ... (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. All rights reserved.Any use is subject to the Terms of Use as given at the website.STEAM CONDENSING SYSTEMS AND AUXILIARIES STEAM CONDENSING...

Sổ tay tính toán cơ khí P3 pdf

Danh mục: Kĩ thuật Viễn thông

... PreheatingCombustion Air 3.4Combustion of Coal Fuel in aFurnace 3.5Percent Excess Air While BurningCoke 3.8Combustion of Fuel Oil in aFurnace 3.9Combustion of Natural Gas in aFurnace 3.11Combustion ... burned.3. Compute the weight or the products of combustion4. Convert the ﬂue-gas weight to volumeThe products of complete combustion of any fuel that does not contain sulfur are CO 2,H2O, ... (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. All rights reserved.Any use is subject to the Terms of Use as given at the website.COMBUSTION COMBUSTION 3.5COMBUSTION OF COAL FUEL...

Sổ tay tính toán cơ khí P4 pps

Danh mục: Kĩ thuật Viễn thông

... load.Plot the power-consumption curve for each type of control device considered.Calculation Procedure:1 Determine the types of controls to considerThere are ﬁve types of controls used for forced- ... hydraulic or electric coupling with constant-speed drivegiving wide control over fan speed.2. Evaluate each type of fan controlTabulate the selection factors inﬂuencing the control decision as ... 68.8-ft (21.0-m) diameter, cir-cular-base conical pile. How many tons of coal does the pile contain if its baseangle is 36Њ? How much bituminous coal is contained in a 25-ft (7.5-m) highrectangular...

Sổ tay tính toán cơ khí P5 pps

Danh mục: Kĩ thuật Viễn thông

... turbine-expansion line.The computed extraction ﬂow for the second-stage heater is not compared withan assumed value because an assumption was not necessary.6. Compare the actual condenser steam ﬂowSketch ... and exhaust conditions, or 1375.5Ϫ 885.3 ϭ 490.2 Btu /lbDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. ... satisfactory, becauseestimates within 1 percent are considered sufﬁciently accurate for all routine anal-yses.For the second-stage direct-contact heater, condensate ﬂow, lb/h is as follows:The required...

Sổ tay tính toán cơ khí P6 ppt

Danh mục: Kĩ thuật Viễn thông

... plentiful, desiccant cooling and cogener-ation become attractive. In coupling the continuously available heat-rejectioncapacity of packaged cogeneration units, Fig. 4, with continuously operating ... demands, the use of integrated components for desiccant cooling, thermal-energy storage, and cogeneration increases. The combination also ensures a rea-sonable constant, cost-effective supply of ... gal/ h consumption, we get the fuel rateϭ (2320 lb/h)/(7.387 lb/gal) ϭ315 gal/h (1192 L/h).The daily fuel consumption is then (24 h /day) (315 gal /h)ϭ 7550 gal/ day (28,577 L /day) . In 7 days...

Sổ tay tính toán cơ khí P7 potx

Danh mục: Kĩ thuật Viễn thông

... these conditions prevail,the savings can be substantial.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. ... hookup, and other con-ditions peculiar to a given job.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. All ... curves when the pump is handlingthe viscous liquid.Calculation Procedure:1. Determine the required correction factorsA centrifugal pump handling a viscous liquid usually must develop a greater...

Sổ tay tính toán cơ khí P8 pps

Danh mục: Kĩ thuật Viễn thông

... website.PIPING AND FLUID FLOW PIPING AND FLUID FLOW 8.27dyers, cookers (nonpressure and pressure), cooking coils, cooking kettles, cookingtanks, cooking vats, cylinder dryers, cylinders (jacketed), double-drum ... power, cogeneration, marine, buildings (ofﬁce, commercial,Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. ... Power Boiler Code and Code for Pressure Piping, ASA B31.1 )Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies....

Sổ tay tính toán cơ khí P9 ppsx

Danh mục: Kĩ thuật Viễn thông

... power-cylinder cooling and raw-water coolingfor the compressor (Ingersoll-Rand Co. ).FIGURE 9 Closed cooling system for power and air cylinders utilizing pipe coil inthe cooling tower (Ingersoll-Rand Co. ).Downloaded ... might be chosen, Fig. 8, combines a heat exchangerfor engine power-cylinder cooling and a cooling tower for raw-water cooling forthe compressor. Either a natural-draft cooling tower, such as ... recirculated through the cooling tower doesnot contact the compressor coolant.Where installation costs are critical, raw water can be used to cool the air-compressor cylinders, Fig. 10. The engine...

Sổ tay tính toán cơ khí P10 ppt

Danh mục: Kĩ thuật Viễn thông

... theminimum consistent with safe and dependable conveying of the material. Alongwith capital cost, the operating and maintenance costs must also be evaluated beforea ﬁnal choice of the conveyor ... system tohandle the conveyed product safely.One way around these problems is use of metal-belt conveyors. These are similarin design to conventional rubber and composite-material conveyor belts ... this installation.5. Compute the required power input to the conveyorThe power input to a conveyor is composed of two portions: the power required tomove the empty belt conveyor and the power...

Sổ tay tính toán cơ khí P11 ppt

Danh mục: Kĩ thuật Viễn thông

... and for pressure drop. The column on the left lists the conditions towhich each equation applies. The second column lists the standard form of thecorrelation for ﬁlm coefﬁcients that is found ... andpressure drop. The columns on the left list the conditions to which each equationapplies, and the second columns gives the standard forms of the correlations forﬁlm coefﬁcients that are found ... fouling on the overall coefﬁcient of heat transfer. (CondenserService and Engineering Co. , Inc.)2. Compute the total cooling-water ﬂow rate requiredUse this relation: total cooling water required,...

Sổ tay tính toán cơ khí P12 potx

Danh mục: Kĩ thuật Viễn thông

... A COMPOUND COMPRESSION-REFRIGERATION PLANT WITH A WATER-COOLEDINTERCOOLER AND LIQUID FLASH COOLERDesign a 100-ton (90-t) compound ammonia-compression refrigeration system hav-ing a water-cooled ... air-conditioning ﬁrst cost should compare favorably with that of a conventional heatingplant plus air-conditioning equipment. For this reason, air conditioning should pref-erably be incorporated ... (www.digitalengineeringlibrary.com)Copyright â 2006 The McGraw-Hill Companies. All rights reserved.Any use is subject to the Terms of Use as given at the website.REFRIGERATION 12.25CompressorDX DXCompressorDX DXCooling...