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Sổ tay tính toán cơ khí P1 potx

... the econom-ically optimal range of h-p steam turbine exhaust pressures of 285 to 395 lb /in2Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... efﬁcient ﬁringof gaseous and liquid fuels upstream of the HRSG, thereby increasing the outputDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... efﬁciency of any tur-bogenerator used in central-station, industrial, marine, and other plants.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P2 ppt

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... at the inlet, reducing water ﬂow, during periods of river or seapollution by external sources.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... / h (31.5-kg/ s)steam turbine exhausting at 2 inHg absolute (6.8 kPa). Determine the number ofDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... per degree difference between the wet-bulb temperature ofthe air and the entering warm water.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P3 pdf

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... percent; Nitrogen ϭ 0.8 percent by volume. First convert the analysisto a percent weight basis:Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... to moles, assume that 100 lb (45 kg) of the fuel is being considered.Set up a tabulation thus:Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... the dryair required per million Btu (1.055MJ) of fuel ﬁred on an HHV basis for variousfuels.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P4 pps

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... the outside,ЊF(ЊC);Rϭ resistance of the wall to heat ﬂow ϭ L/(kXA), where L ϭ length of pathDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... temper-ature correction factor. Or, [(385Ϫ 375)/ (400 Ϫ 375)](1.273 Ϫ 1.255) ϩ 1.255 ϭ1.262.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... such plants.The data present in these comments on new fuels for boilers is from Powermagazine.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P5 pps

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... is used forselecting hot-water heaters for buildings, marine, and portable service. Various au-Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... output, Btu). Or, SR ϭ3413/369.1 ϭ 9.25 lb/kWh (4.2 kg/kWh). With the steam rate known, the nonex-Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... Inc.)TABLE 1 Multipliers for Base Heat-Transfer Rates[For tube OD5⁄8to1in(1.6 to 2.5 cm) inclusive]Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P6 ppt

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... Polsky, President,Indeck Energy Services, Inc., as ‘‘the simultaneous production of useful thermalDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... rea-sonable constant, cost-effective supply of essentially free electric power for generalbuilding use.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... gas. Steamat 30 lb /in2(abs) (206.8 kPa) has a temperature of 250.33ЊF (121.3ЊC). Thus, theDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P7 potx

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... 12.7, 1 to25.4, 2 to 50.8, 4 to 101.6, 6 to 152.4 10 to 254, and 20 to 508. (Hydraulic Institute.)Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... /20,000is 660; hence, we would choose a motor or turbine driver whose rpm does notexceed 660.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... the chartonly for pumps handling uniform liquids; slurries, gels, paper stock, etc., may causeDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P8 pps

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... piping at el-evated temperatures conveying steam, water, oil, gas, or other ﬂuids or vapors. ToDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... coefﬁcient and are somewhateasier to use. Their accuracy equals that of the ﬂow coefﬁcient method.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... ft/s (1288.7 m/s)An alternative solution uses Fig. 1. With a D/t ratioϭ 1.402/ 0.049 ϭ 28.6 forDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P9 ppsx

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... oil-cooled power pistons. Compressor, left, uses metallic piston-rod packing (Cooper-Bessemer Corp.).Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... cool the air-compressor cylinders, Fig. 10. The engine power cylinders, which usually operateDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... column 4, Table 3. The values shownrepresent typical load factors encountered in industrial plants.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P10 ppt

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... super-capacity elevators. A 25-hp (18.7-kW) mo-tor would probably be chosen for this elevator.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... the website.MATERIALS HANDLING10.21FIGURE 6 Duct resistance chart. (American Air Filter Co.)Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... it is wise toverify the choice before a ﬁnal decision is made. Table 1, presented by Harold V.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P11 ppt

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... of⌬Ti/⌬TMand ⌬To/⌬TMmay be used, as long as a horizontal orientation on the tubeside is used with aDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... 150ЊF(83.3ЊC); L ϭ 300 Ϫ 230 ϭ 70ЊF (38.9ЊC). Then LMTD ϭ (150 Ϫ 70) / ln (150 /70)ϭ 105ЊF (58.3ЊC).Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... min/h)ϭ 6000gal/h (22,710 L / h), the weight ﬂow rate of the oil, using the weight of water ofDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P12 potx

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... of heatingwater for either domestic or process uses. A pump, Fig. 8, is used to force-circulateDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... 1002ƒ*This may also be obtained by extrapolating the superheated vapor properties in steam tables.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... cooling (U.S. Patent 3918525 and other patents pending). (Gershon Meckler, P.E. and HPAC magazine.)Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P13 pot

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... clarity and solidsconcentration at G levels between 1,800 and 2,500 times the force of gravity.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... assuming air contains 23.2 percent oxygen by weight and the densityof air is 0.075 lb/ft3is:Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... (393.6 m / d)w8dNote that in case (a) or (b) above, the weight of sludge wasted is the same (3933Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P14 pot

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... imperviousness of thesoil. This means that less rainwater will reach the sewer because the coefﬁcient ofDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... requirements for a variety of industries. Table 9 shows a few typicalwater needs for selected industries.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... has a minimum average crushing strength of 6000 lb (26.7kN) by the three-edge-bearing method.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...

Sổ tay tính toán cơ khí P15 pdf

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... heaters and ten ranges,each of which has four top burners and one oven burner. What maximum gasDownloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... reserve for ﬁre-ﬁghting use. (c) Vertical standpipe for water storage. (MuellerEngineering Corp.)Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... each branch vent connected to it, if desired. Use the NPC,or Table 8, to determine the vent size.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...