unit conversions. dimensions length flow volume pressure power
Post on 13-Jan-2016
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Unit Conversions
Dimensions
• Length
• Flow
• Volume
• Pressure
• Power
Length
• Foot, meter, mile, kilometer, light year– 1 meter = 3.28 feet– So 1 foot is about one third of a meter– 1 mile = 1.6 kilometers
• 1 light year = 5.87849981 × 10^12 miles
• 5,878,499,810,000 miles
Volume
• Gallons, liters, cubic feet
• 1 gallon = 3.78 liters
• 1 cubic ft = 7.48 gallons = 28.3 liters
• Think about it!
Flow
• Gallons per minute (GPM)
• Cubic feet per Second (cfs)
• Liters / second (l/s)
• 1 cfs = 448.8 GPM = 28.3 l/s
• 1 GPM = .0022 cfs = .063 l/s
• If a 5 gallon bucket fills in 6.5 seconds how many gallons per minute is this?
Pressure
• Pounds per square inch or psi, Feet of head
• 1 psi = 2.31 ft
• So if head of 140 ft, then 140/2.31 = 60.6 psi
• How many feet of head can a pipe rated for 100 psi handle?
Temperature
• °F = 9/5 * °C + 32
• °C = (°F – 32) * 5/9
• K = 2273.15 + °C
• How many °F is 0 °C?
Others
• 600 kWh = 1 barrel of oil
Power
• Watts, Kilowatts
• 1 kilowatt = 1000 watts
• The Jacob Wind Turbine on Beech Mountain produces 20,000 watts, how many Kilowatts is this?
• The HV 1200 produces 1200 watts, how many KW is this?
Power
• If the HV1200 makes max power, How much energy can be stored, used to heat water, or used in some way over 1 week’s time?
• What percentage of the average household’s energy use is this amount of energy created by the microhydro system?
Converting Values
• Either apply known conversion• Or do it unit by unit with factoring.• Examples: On Chalk Board
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