JSutils for Computer Energy Saving and Energy Use Calculation
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Updated: 08-Mar-2010
JSutils Compact Disk

EnCalcGU Formulae

Version: 2.1
Size: 476KB
Released
09-March-2010
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EnCalcGU uses the following formulae to calculate the results:

Actual Results

Days

=

Date 2 - Date 1

Number Quarters (1)

=

The number of complete and partial quarters between Date 1 and Date 2

Number Months

=

The number of complete and partial months between Date 1 and Date 2

Units Used (2)

=

( Meter Reading 2 - Meter Reading 1 )

KWHr Used (3,4)

=

( Units Used * Correction Factor * Calorific Value * Conversion Factor) / 3.6

Rate 1 KWHr (5,7)

=

The lower value of: KWHr Used and
(Rate 1/2 Break Point * Number Quarters in Date 1 To Date 2 )

Rate 2 KWHr

=

KWHr Used - Rate 1 KWHr

Rate 1 Cost

=

Rate 1 KWHr * Rate 1 Unit Cost

Rate 2 Cost

=

Rate 2 KWHr * Rate 2 Unit Cost

Total Fixed Charge (7)

=

Fixed Charge * Number Quarters in Date 1 To Date 2

Total Cost (7)

=

Rate 1 Cost + Rate 2 Cost + Total Fixed Charge - ( Discount 1 * Number Quarters )

Total Cost (inc VAT) (6,7)

=

( Total Cost * ( 1 + VAT%) / 100 ) - ( Discount 2 * Number Quarters )

Cost per Day

=

Total Cost (inc VAT) / Days

CO2 Generated (Kg)

=

(Total of Units Used) * CO2 Conversion Factor

1. See Using EnCalcGU for an explanation of this formula.
2. Works in whole units, any decimals entered will be rounded.
3. Conversion Factor is 1 for cubic metres and 2.8 for 100;s of cubic feet (old style UK meters).
4. The Volume Conversion Factor is also known as the Correction Factor
5. If the Break Point = 0 then Rate 1 KWHr = KWHr Used.
6. If the currency selected is not UK Pounds (£) or Euros ( €) then VAT is changed to TAX.
7. If Monthly is checked quarters are replaced by months .

Predicted Results

Predicted Days

=

Date 1 + No Quarters To Predict Forward (This can be less than Actual Days)

Units Used

=

( ( Meter Reading 2 - Meter Reading 1 ) * Predicted Days ) / Actual Days

Rate 1 KWHrs

=

( The lower value of : KWHr Used and
( Rate 1/2 Break Point KWHr * Number Predicted Quarters)

Rate 2 KWHr

=

KWHr Used - Rate 1 KWHr

Rate 1 Cost

=

Rate 1 KWHr * Rate 1 Unit Cost

Rate 2 Cost

=

Rate 2 KWHr * Rate 2 Unit Cost

Fixed Charge Total

=

Fixed Charge * Number Predicted Quarters

Total Cost

=

Rate 1 Cost + Rate 2 Cost + Total Fixed Charge - ( Discount 1 * Number Predicted Quarters )

Total Cost (inc VAT)

=

( Total Cost * ( 1 + VAT%) / 100 ) - ( Discount 2 * Number Predicted Quarters )

Cost per Day

=

Total Cost (inc VAT) / Predicted Days

CO2 Generated (Kg)

=

(Predicted Number Of Units Used) * CO2 Conversion Factor