Rated Free Air Delivery rate of the compressor (424 cfm typical for a 75kW Compressor)

Time on Load

3

[min]

Time interval for compressor to load

Time off Load

10

[min]

Time interval for compressor to unload

% Air Leaks

23%

[%]

= (Time on Load [min] x 100) / (Time On Load [min] + Time Off Load [min])

Air Leakage rate

46

[cfm]

= (% Air Leaks [%]) x (Rated Free Air Delivery [cfm])

Approximate Energy Wasted

32,308

[kWh/y]

= (Air Leakage Rate [cfm]) x 700 [kWh/(cfm)]

Average Electricity Price

$0.140

[$/kWh]

Insert from Energy Bills Analysis Tool

Approximate Energy Cost of Leakage

$4,523.08

$1,400.00

[$/y]

= (Approximate Energy Wasted [kWh/y]) x (Average Electricity Price [$/kWh])

Savings From Reducing Leak

Parameter

Example

Data

Unit

Comment

Motor Power

111.90

[kW]

Motor rating of compressor that can be Switched Off

Motor Efficiency

92%

[%]

Motor efficiency for compressor that can be Switched Off (default = 92%).

Average Part Load Condition

70%

[%]

Average compressor loading expressed as a percentage of the CFM rated capacity. (Default: Modulating machines = 70%; Load/unload with little storage = 70%; Load/unload with a lot of storage = 40%; Variable inlet volume = 40%; VSD = 20%)