An assessment of a manufacturing facility revealed the following information for

Question

An assessment of a manufacturing facility revealed the following information for their 25-hp air compressor that operates at full speed for 8,700 hours/year. Measurements of the electric current drawn by the compressor are shown in Figure 1. estimate energy and demand cost savings, as well as the simple payback for installation. Assume electricity costs of $0.0976/kWh and $5.00/kW 45 35 25 15 12:00:00 Av 12:00:00 A 12:00:00 A 12:00:00 AM 02/09/17 12:00:00 AM GMT-07:00 02/12/17 12:00:00 AM GMT-07:00 37% 40% 27% 30% 20% 10% 096 21% 8% 7% 096 096 0% 0% 0% 0% 23 24 25 26 27 28 29 30 31 32 33 Single phase current (Amps)

Explanation / Answer

Step 1:

25hp into1hp=0.746 kw

P=18.65KW

Energy unit=18.65*8700=162255KWh

electricity cost=0.0976$/KWh

total energy cost per year=0.0976*162255=$15836.08

Demand cost=$5/KW*18.65KW=$93.25

Simple payback for installation

step1:We should know system installation cost

Step2:Without system installation or old or poor or conventional system installation cost

Step3:compare run cost of conventional system(loss system) and run cost of given efficient system cost

Step4:profit given efficient system

step5:through profit you will get installation cost is a payback of installation

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