handbook of mechanical engineering

Handbook of Mechanical Engineering Calculations P1

... given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS1.10POWER GENERATIONfrom the steam bottoming cycle. For this study, two types of supplementary firingare considered—(1) ... and off-design performance of an HRSG, such as that in Fig. 16, under different conditions of exhaust flow, tem-perature, and auxiliary firing without delving into the mechanical design aspects of tube ... bledϭ(H6ϪH5)/(H2ϪH5)ϭ(196.15/1107.9)ϭ0.1771, or 17.71 percent.2. Find the amount of heat converted to work per pound (kg) of throttle steam(b) The amount of heat converted to work per pound (kg) of throttle steamϭ(H1ϪH2)ϩ(1Ϫ0.1771)(HgϪH4)ϭ467.3...

Handbook of Mechanical Engineering Calculations P2

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... (0.28 kg) of water per pound (kg) of dry air. Since the watercontent of the air is a function of the partial pressures, (0.622) (0.5067) /[(2ϫ0.5067)]ϭ0.673 lb of water per lb of dry air ... a capacity of 8000 gal (30,280.0 L), and the steam spacehas a capacity of 30,000 gal (113,550.0 L) of water.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... the quantity of steam, lbm/h (kg/h), lost from thecondenser.Calculation Procedure:1. Compute the mass rate of ﬂow per hour of the air leakageThe mass rate of ﬂow per hour of the estimated...

Tài liệu Handbook of Mechanical Engineering Calculations P3 pdf

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... combustionand increases the weight of the products of combustion per pound (kilogram) of coal burned. Therefore, the weight of the products of combustion is the sum of theweight of the combustion products ... cu m) of natural gas; 1300 cu ft of air (36.8 cu m) per gal (0.003785 cu m) of No. 2 fuel oil; 1450 cu ft of air (41cu m) per gal of No. 5 fuel oil; 1500 cu ft of air (42.5 cu m) per gal of No. ... combustion of 1 lb (0.45 kg) of coalϭsum of nitrogenand oxygen requiredϭ8.4228ϩ2.5444ϭ10.9672 lb (4.975 kg) of air per pound(kilogram) of coal burned.3. Compute the weight of the products of...

Tài liệu Handbook of Mechanical Engineering Calculations P4 pptx

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... Mƒϭlb of moisture per lb fuelburned; Maϭlb of moisture per lb of dry air to furnace; Cbϭlb of carbon burnedper lb of fuel burnedϭCϭRCr; Crϭlb of combustible per lb of refuse; ... velocity of 4400 ft /min(22.4 m /s), an outlet velocity pressure of 1.210 inH2O (0.30 kPa), a speed of 1222r/ min, and an input hp of 255.5 bhp (190.5 kW). The tabulation of these quantitiesis of ... lb of refuse; Rϭlb of refuse per lb of fuel; H2,N2,C,O2,Sϭlb of each element per lb of fuel, asﬁred; CO2, CO, O2,N2ϭpercentage parts of volumetric analysis of dry combustiongas...

Tài liệu Handbook of Mechanical Engineering Calculations P5 pdf

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... Terms of Use as given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS5.4POWER GENERATIONm) are used. Use the Standards of the Bleeder Heater Manufacturers Association,Inc., ... conditions of 1800 psia (12,402 kPa) and 1050ЊF(565.6ЊC). At exit from the cylinder the steam has a pressure of 500 psia (3445kPa) and a temperature of 740ЊF (393.3ЊC). A portion of this ... more heaters. Plot the percentimprovement vs. number of stages of extraction, Fig. 6, to observe the effect of additional heaters. A plot of this type shows the decreasing gains made by addi-tional...

Tài liệu Handbook of Mechanical Engineering Calculations P6 pdf

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... (www.digitalengineeringlibrary.com)Copyright © 2006 The McGraw-Hill Companies. All rights reserved.Any use is subject to the Terms of Use as given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING ... introduced everyyear.*Elliott, Standard Handbook of Power Plant Engineering, McGraw-Hill, 1989.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... quantity of dust entering the engineEach 1000 ft3(28.3 m3) of air entering the engine contains 1.6 gr (103.7 mg) of dust. Thus, during every minute of engine operation, the quantity of dust...

Tài liệu Handbook of Mechanical Engineering Calculations P7 docx

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... this handbook. Once the required ﬂow rate is determined, apply a suitable factor of safety. Thevalue of this factor of safety can vary from a low of 5 percent of the required ﬂowto a high of ... reserved.Any use is subject to the Terms of Use as given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS7.38PLANT AND FACILITIES ENGINEERING FIGURE 23 Negative lift (gravity ... pumpsare generally used. Mechanical seals are becoming more popular for all types of centrifugal pumpsin a variety of services. Although they are more costly than packing, the mechanical seal reduces...

Tài liệu Handbook of Mechanical Engineering Calculations P8 doc

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... velocity of aflowing fluid is changed by opening or closing a valve, pressure surges result. Theamplitude of the pressure surge is a function of the rate of change in the velocity of the mass of fluid. ... factor of 2 for traps installed between aboiler and the end of a steam main; traps at the end of a long steam main or ahead of pressure-regulating or shutoff valves usually have a safety factor of ... and King—Piping Handbook for derivation of the flow equations. Use the tables in Crocker and King to simplifyfinding the fifth power of the inside diameter of a pipe. The method of the nextcalculation...

Tài liệu Handbook of Mechanical Engineering Calculations P9 pdf

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... (www.digitalengineeringlibrary.com)Copyright © 2006 The McGraw-Hill Companies. All rights reserved.Any use is subject to the Terms of Use as given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING ... (339.6 m3/min) of air at a pressure of 14 lb/in2(abs) (96.46 kPa) and a temperature of 60ЊF (15.6ЊC).Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... cool-ing effectiveness of both types of towers are about equal. Data given on coolingtowers elsewhere in this handbook can be helpful to the designer in choosing thebest type of tower to use for...

Tài liệu Handbook of Mechanical Engineering Calculations P11 doc

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... website.Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS11.2TABLE 1Heat-Exchanger Selection Guide*Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... heat HmBtu required to melt a solid is Hmϭ(weight of solid melted, lb)(heat of fusion of the solid, Btu /lb). Since the heat of fusion of lead is 10 Btu/ lb (23.2kJ/kg), Hmϭ(600)(10)ϭ6000 ... NoWhat number of tubeside passes areavailable?Number limitedby number of tubesNumber limited bynumber of U-tubesNumber limited bynumber of tubesOne or two Number limited bynumber of tubes.Odd...

Tài liệu Handbook of Mechanical Engineering Calculations P12 pdf

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... Terms of Use as given at the website.REFRIGERATION12.28PLANT AND FACILITIES ENGINEERING This procedure is the work of Norman R. Sparks, Professor and Head, Depart-ment of Mechanical Engineering, ... Professor of Mechanical Engi-neering, The Pennsylvania State University. SI values were added by the handbook editor.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright ... theheat-transfer characteristics of the dehumidiﬁer used.This procedure, and Figs. 9 through 12, are the work of Norman R. Sparks,Professor and Head, Department of Mechanical Engineering, The PennsylvaniaState...

Tài liệu Handbook of Mechanical Engineering Calculations P13 doc

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... percent of the averageannual demand but may range up to 200 percent of the average annual demand.Maximum daily demands of 150 percent of the average annual demand and max-imum hourly demands of ... effluentwastewater is to have a BOD5 of 20 mg/L. Both filters are to have a depth of 7feet (2.1 m) and a recirculation ratio of 2. Filter media will consist of rock. Sizeboth stages of the trickling filter ... ft3/Mgal (3.74 to 201.9 m3/L) of flow. Assumea value of 20 ft3/Mgal (149.5 m3/L). Therefore, the average quantity of grit ex-pected is:33 33Volume of grit (ft / d)ϭ(20 ft / Mgal)(4.0...

Tài liệu Handbook of Mechanical Engineering Calculations P14 pptx

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... (304.8-m) lengths of various sizes of pipe and for different values of the Hazen-Williams coefficientC. When the percentage of total flow is used for computing͚h in Fig. 11, the loss of head due to ... imperviousness of 50 percent if the time of concentration is 15 min? What wouldbe the effect of planting a lawn over 75 percent of the site?Calculation Procedure:1. Compute the hourly rate of rainfallTwo ... sewer,acres; Iϭcoefficient of runoff or percentage of imperviousness of the area; othersymbols as before. So Qϭ(40)(0.50)(8)ϭ160 ft3/s (4.5 m3/s).3. Compute the effect of changed imperviousnessPlanting...

Tài liệu Handbook of Mechanical Engineering Calculations P15 docx

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... Heating Values of Commercial GasesTABLE 21Capacities of Gas Pipes [Losses of pressure are shown in inches of water per100 ft (millimeters per 30.4 m) of pipe, due to the ﬂow of gas with a speciﬁc ... size for each roofDecide whether the small roof area, i.e., the machinery room roof, will be drainedby separate leaders to the ground or to the main roof area. If the small roof areais drained ... given at the website.Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONSPLUMBING AND DRAINAGE FOR BUILDINGS AND OTHER STRUCTURES15.35TABLE 13Demand Weight of Fixtures in Fixture UnitsЊFIGURE...

Tài liệu Handbook of Mechanical Engineering Calculations P16 doc

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... type of fuel, oil, gas, coal, etc., can be usedfor the structure.This procedure is the work of Jerome F. Mueller, P.E. of Mueller Engineering Corp.HEAT RECOVERY USING A RUN-AROUNDSYSTEM OF ... McClure & Associates, and Afﬁliate Professor of Mechanical Engineering, Washington University, as reported in HPAC Magazine. SI values were added bythe handbook editor.Additional design pointers ... gallons per minute *Handbook of Air-Conditioning System Design, McGraw-Hill, New York, various dates.Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)Copyright...