Tài liệu Handbook of Mechanical Engineering Calculations P11 doc

... website. Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS 11.2 TABLE 1 Heat-Exchanger Selection Guide* Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright ... heat H m Btu required to melt a solid is H m ϭ (weight of solid melted, lb)(heat of fusion of the solid, Btu /lb). Since the heat of fusion of lead is 10...

Ngày tải lên: 17/12/2013, 11:15

... reserved. Any use is subject to the Terms of Use as given at the website. Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS 7.38 PLANT AND FACILITIES ENGINEERING FIGURE 23 Negative lift (gravity ... this handbook. Once the required flow rate is determined, apply a suitable factor of safety. The value of this factor of safety can vary from a low of 5 percent of...

Ngày tải lên: 17/12/2013, 11:15

... surges result. The amplitude of the pressure surge is a function of the rate of change in the velocity of the mass of fluid. This procedure shows how to compute the amplitude of the pressure surge with ... factor of 2 for traps installed between a boiler and the end of a steam main; traps at the end of a long steam main or ahead of pressure-regulating or shutoff valves usua...

Ngày tải lên: 17/12/2013, 11:15

... percent of the average annual 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 ... effluent wastewater is to have a BOD 5 of 20 mg/L. Both filters are to have a depth of 7 feet (2.1 m) and a recirculation ratio of 2. Filter media will consist of rock. Size both...

Ngày tải lên: 25/12/2013, 23:18

... Heating Values of Commercial Gases TABLE 21 Capacities of Gas Pipes [Losses of pressure are shown in inches of water per 100 ft (millimeters per 30.4 m) of pipe, due to the flow of gas with a specific ... given at the website. Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS PLUMBING AND DRAINAGE FOR BUILDINGS AND OTHER STRUCTURES 15.35 TABLE 13 Demand Weight of...

Ngày tải lên: 25/12/2013, 23:18

... type of fuel, oil, gas, coal, etc., can be used for the structure. This procedure is the work of Jerome F. Mueller, P.E. of Mueller Engineering Corp. HEAT RECOVERY USING A RUN-AROUND SYSTEM OF ... McClure & Associates, and Affiliate Professor of Mechanical Engineering, Washington University, as reported in HPAC Magazine. SI values were added by the handbook editor. Additi...

Ngày tải lên: 25/12/2013, 23:19

... loss of 8 Btu /(day ⅐ ft 2 ) of floor area per Њ F [W/(m 2 ⅐ K)]. Total building heat loss will increase with the increase in the ratio of collector to floor area because of the larger areas of glazing. ... and the coefficients of heat transmission of collector, windows, doors, walls, and roofs must be known to calculate the conductive heat losses of a Downloaded from Digital En...

Ngày tải lên: 25/12/2013, 23:19

... exact selection of a spe- cific make of belt, consult the manufacturer’s tabulated or plotted engineering data. Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright ... percent of rated torque to protect the gears and other parts of the drive. Space limitations dictate an upper limit of 4 in (10.2 cm) and a lower limit of 2.5 i...

Ngày tải lên: 25/12/2013, 23:19

... MECHANICAL AND ELECTRICAL BRAKES 24.17 This procedure is the work of Allen S. Hall, Jr., Professor of Mechanical En- gineering, Purdue University; Alfred R. Holowenko, Professor of Mechanical Engineering, ... Doughtie, Professor of Mechanical Engineering, University of Texas. DESIGNING A BRAKE AND ITS ASSOCIATED MECHANISMS Design a hoist for the building industry to lift a...

Ngày tải lên: 23/01/2014, 05:20

... (cost of insert) / [(number of regrinds per insert)(number of edges per grind)] ϩ (cost of holder or head)/[(number of in life of holder or head)(number of regrinds per insert)(number of edges ... depth of cut of 0.005 in (0.1 mm) per pass if the material cut is medium steel? How many passes of the tool are required? Downloaded from Digital Engineering Library @ McGraw...

Ngày tải lên: 23/01/2014, 05:20