There are two kinds of energy-potential and kinetic. Potential energi is like a body of water controlled by adam. The water has a great petential for doing work; but, until the water flows though water weel, no energy is produced. Kinetic energy is the energy of a moving body. The formula is KE = ½ MV2 = foot Pounds. M = Weight, divided by 32 (the acceleration due to gravity). V = Velocity in feet per second (fps).
a). Energy Equivalents – English
1 Btu = 778 ft.lb
= 252 gram-calories
= 1054 joules
1 Horsepower = 33.000 ft.lb/min
= 550 ft.lb/sec
= 746 watt
= 2545.6 btu/hr
= 42.42 Btu/min
= 1.014 hp (metric).
1 hosepower hour = 1 horsepower for 1 hr
= 1.980.000 ft.ib
= 746 watt hours
= .746 kilowatt hours
= 2545 Btu
1 Kilowatt = 1000 watts
= 1.34 horsepower
1kilowatt hour = 1 kilowatt for hr
= 1000 watt hours
b). Ice Melting Effect (IME)
1 ton of refrigeration = 288.000 Btu/day
= 12.000 Btu/hr
= 200 Btu/min
= 83.3 lb. Of ice/hr
c). Linear Mesuare Equivalents-English-Metric
1 inch = 2.54 centimetres
= 25.4 millimetres
= 5.400 microns
1 food = 12 inches = .304 metres
= 30.48 cntimetres
1yard = 3 feet = .914 metres
= 91.44 centimetres
1 micron = .000.394 inches
1 millimetre = 1000 micron = .0394 inches
1 centimetre= 10 millimtres = .3937 inches
1 metre = 100centimetre = 39.37 inches
1 kilometre = 1000 metres = 62137 miles
d). Energy Equivalents – Metric
Energy
1 dyne cm = 1 erg = .001 g cm = 7.38 x 10.8 ft ib
1 g cm = 980.6 ergs = 7.233 x 10.5 ft.lb
1 ft.lb = 13.557.300 ergs = 13.825.5 g cm
1 therm = 100.000 Btu
Rate of Energy
1 erg/sec = 1 dyne cm = 7.38 x 10.8 ft.lb/sec
1 g cm = 980.6 ergs/sec = 7.233 x 10.5 ft.lb/sec
1 ft.lb/sec = 13.557.300 ergs = 13.825.5 g cm/sec
e). Area Equivalents
1 q.in = .0065 sq. Metres
1 sq.ft = 144 sq.in = .093 sq metres
1 sq.yd = 9 sq.ft = .836 sq mtres
f). Volume Equivalents
1 cu.in = .016 litres
= .16.39 centimetres
1 cu ft = 1728 cu. In = 28.317 litres = .0283 metres
1 cu.yd = 27 cu.ft
= 46.656 cu.in
1 gal = .1337 cu.ft = 3.79 litres
= 231 cu.in = 3785 centimetres
h). Heat equivalents
1 Btu = 258 calories
1 kilocalorie = 1000 calories
1 Btu/lb = .55 kcal/kg
1 Btu/lb = 2.326 kJ/kg
1 kcal/kg = 1.8 Btu/lb
1 Btu/hr = .2931 watts
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