JSutils for Computer Energy Saving and Energy Use Calculation  
Updated: 22-Jul-2008
JSUtils Compact Disk

EnCalcLU Formulae

Version: 1.3
Size: 413KB
Released
23-Julyl-2008
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EnCalcLU uses the following formulae to calculate the results:

Actual Results

Days

=

Date 2 - Date 1

Number Of Months Or 6 Month Periods **

=

Int ( ( ( Number Days Between Date 1 And Date 2 ) - 10 ) / ( 365 / 2 ) ) + 1
OR
Number Of Complete and Partial Months Between Date 1 And Date 2

Water Units Used

=

Meter Reading 2 - Meter Reading 1

Sewage Units Used

=

(Meter Reading 2 - Meter Reading 1 ) * Sewage Volume Allowance

Water Units Cost

=

Water Units Used * Water Volume Charge

Sewage Units Cost

=

Sewage Units Used * Sewage Volume Charge

Water Fixed Charge

=

Period Water Fixed Charge * Number of Periods

Sewage Fixed Charge

=

Period Sewage Charge * Number of Periods

Total Fixed Charge

=

Water Fixed Charge + Sewage Fixed Charge

Total Cost

=

Water Units Cost + Sewage Units Cost + Total Fixed Charge

Total Cost (inc VAT)

=

Total Cost * ( 1 + VAT%) / 100

** See Using EnCalcLU for an explanation of this formula which is used to work out the multiplier for fixed charges and predictions

 

Predicted Results

Predicted Days

=

Date a + Number of 6 Months or Months To Predict Forward (This can be less than Actual Days)

Water Units Used

=

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

Sewage Units Used

=

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

Water Units Cost

=

Water Units Used * Water Volume Charge * ( Predicted Days / Actual Days )

Sewage Units Cost

=

Sewage Units Used * Sewage Volume Charge * ( Predicted Days / Actual Days )

Water Fixed Charge

=

Period Water Fixed Charge * Number of Prediction Periods

Sewage Fixed Charge

=

Period Sewage Charge * Number of Prediction Periods

Total Fixed Charge

=

Water Fixed Charge + Sewage Fixed Charge

Total Cost

=

Predicted Water Units Cost + Predicted Sewage Units Cost + Predicted Total Fixed Charge

Total Cost (inc VAT)

=

Predicted Total Cost * ( 1 + VAT%) / 100