Question
a) The annual demand cost (tools only) is about $111,000 per year for 60 tools operating at 25 scfm, resulting in a demand flow of
a) The annual demand cost (tools only) is about $111,000 per year for 60 tools operating at 25 scfm, resulting in a demand flow of 1500 scfm. If we only had 400 tools at 25 scfm. What is the total scfm and total annual cost if we are scaling up from 60 to 400 tools using 25 hp/ 100 scfm at 160 psia.
b)By reducing the pressure by almost 20% from 160 psia to 130 psia, it is possible to reduce the compressor energy consumption by about 12%. For the lower pressure, what does the new power consumption (hp/scfm) become?
c) What is the annual saving for the 60 tool factory and the 400 tool factory if the system pressure is reduced to 130 psia from 160 psi. Hint: Use proportions and the results from the previous 2 problems
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