68519 Mercruiser NUT

Air Compressors:
BHP = 1/4 × cu. ft. per minute at 100 psi Increase BHP 10% for 125 psiDecrease BHP 10% for 80 psiAMA HP for U.S.A. Tax Purposes:
Where: N = No. of Cylinders D = Piston Diameter in inchesBrake Mean Effective Pressure:
Conveyors: 15 to 20° incline.
Cooling:
Heat Exchanger Flow Rate Raw water to jacket water 1:1 to 2:1Submerged Pipe Cooling 1/2 Sq. ft. surface area per HPWith 85°F flowing raw waterElectricity:
Generator Capacity Required: Motors:1 kW per nameplate HP (motor running cool or warm to touch)11/4 kW per nameplate HP (motor running hot to touch)Horsepower Requirements: 11/2 BHP per kW of load or Electric Sets:
Motor Starting Requirements: Inrush kVa (Code F motor) = 5.5 × BHPInrush Current (Code F motor)= 6.2 × Full load rated current1 kVa per HP at full loadGenerator full load rated current capacity: Generator Cooling Requirements: Air Flow - 150°CFM per kW loss × efficiencyCircuit Breaker Trip Selection: 1.15 to 1.25 × full load generator amp ratingSingle Phase Rating of 3-Phase Generator: 60% of 3-phase ratingGenerator Temperature Rise: Increase 1°C for each 330 feet above 3300 feetFuel Consumption
Gas Compressor:
BHP = 22 RcVSWhere: Rc = Stage Compression RatioV = Million cu. ft./dayS = Number of StagesHeat Rejection
% of Fuel Energy Consumed Jacket Water Prechambered engines BTU/min = 36 × BHPDirect injection engines BTU/min = 27 × BHP Hours Per:
Year = 8760 (365 Days)Week = 168 (7 Days)Month = 720 (30 Days)Oilfield Drilling:
Hoisting Mud Pumps Rotary Table On Site Power Requirements:
Based on 100,000 sq. ft. of office bldg., etc., and 40°N. latitudes Electric Requirements: 600 kW continuous load(air conditioning is absorption)Use three - 300 kW units (2 prime and 1 standby)Air Conditioning Compressor 400 tons prime loadUse two - 200 HP engines (No standby)Pumps:
Pipe Line BHP = Barrels per hour × psi × 0.00053 *Efficiency Refrigeration
One ton refrigeration = 200 BTU/Min. = 12,000 BTU/Hr.One boiler HP = 33,475 BTU/Hr.One ton compressor rating = One Engine HPAuxiliary air conditioning equipment requires 1/4 HP per ton of compressor ratingIce Plant: Complete power requires 4-5 HP per daily ton capacitySawmill:
11/2 BHP per inch of saw diameter at 500 RPM Increase or decrease in proportion to RPMSwing Cut-Off Saw Table Trimmer 71/2 to 10 BHPBlower Fan 12-foot sawdust 3 to 5 BHPPlaner Mill 2 to 4 BHP per 100 board feet per hour 24 to 30-inch planers 15 to 25 BHPEdgers Approximate fuel consumption: Softwood 1 gal. per 1000 board feetHardwood 1 gal. per 750 board feetPropellor Shaft Size Selection:
For intermediate shaft and tailshaft in marine installations Where: D = Diameter in inchesHP = HorsepowerS = Torsional stress in PSI (usually 5000)Shovels and Draglines:
Use manufacturer's recommendations. Torque: (4 cycle only) Torque Converters:
Peak output shaft horsepower: Normally 80% of input horsepower for either single or three-stage converterOutput shaft speed at peak output horsepower: Single-stage - 0.7 to 0.85 engine full load speedThree-stage - 0.5 to 0.6 engine full load speedTorque multiplication at or near stall: Single-stage - 2.2 to 3.4 times engine torqueThree-stage - 3.6 to 5.4 times engine torqueVentilation:
Natural 1/2 net square inch for each BHPBlown 1/3 net square inch for each BHPMetric Units
Air Compressors:
110 kW = 1 m3/min @ 850 kPa100 kW = 1 m3/min @ 675 kPa90 kW = 1 m3/min @ 550 kPaAMA Power for U.S.A. Tax Purposes:
Where: N = No. of CylindersD = Piston Diameter in millimetersBrake Mean Effective Pressure:
Conveyors: 15 to 20° incline. Cooling:
Heat Exchanger Flow Rate Raw water to jacket water 1:1 to 2:1Submerged Pipe Cooling 1 m2 surface area per 16 kW with 30°C flowing raw waterElectricity:
Generator Capacity Required: Motors:11/3 kW per nameplate kW (motor running cool or warm to touch)12/3 kW per nameplate kW (motor running hot to touch)Engine Power Requirements: Electric Sets:
Motor Starting Requirements: Inrush kVa (Code F motor) = 41/8 × nameplate kWInrush Current (Code F motor) = 6.2 × full load rated current11/3 kVa per kW at full loadGenerator full load rated current capacity: Generator Cooling Requirements: Air Flow = 41/4 m3 per kW loss × efficiencyCircuit Breaker Trip Selection: 1.15 to 1.25 × full load generator amp ratingSingle Phase Rating of 3-Phase Generator: 60% of 3-Phase ratingGenerator Temperature Rise: Increase 1°C for each 100 meters above 1000 metersFuel Consumption
3*33 720 kJ/mGas Compressor:
kW = 777 Rc VSWhere : Rc = Stage Compression RatioV = Millions cubic meters per dayS = Number of Stages