Compressed Air

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Compressed Air
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1250 hp compressor assembly
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Reducing the Cost of Compressed Air

• Compressed air is the fourth utility
• A lot of energy (hence, money) is wasted
  producing compressed air.
• Most compressors are driven by electric motors.

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It can cost more to run a compressor for one
year than the cost of the compressor.
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Big source of compressor costs. Many times up to
40 lost in leaks. 10 is considered acceptable.
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The energy wasted from a leak, is the energy used
to compress the air that is leaking.
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Cdischarge depends on shape of hole, .6 to .9
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Example 6-22 page 363
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The electrical energy consumed by a motor is
inversely proportional to its efficiency.
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Using too big of a motor can cut efficiency.
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A rule of thumb is that a 3C drop in inlet air
temp results in a 1 decrease in power consumed.
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Waste heat from the compressor can be use for
many useful purposes.