public InvestmentCalculations() {
super(
"Investment Calculations",
"A calculator that allows you to see how much money a simulation is saving.",
IconLoader.getIcon("calendar.png"));
outputWidgetPanel.setLayout(new BorderLayout(0, 0));
JScrollPane m_scroller = new JScrollPane();
outputWidgetPanel.add(m_scroller, BorderLayout.CENTER);
JPanel header = new JPanel(new BorderLayout(0, 0));
JPanel gridit = new JPanel(new GridLayout(0, 4));
outputWidgetPanel.add(header, BorderLayout.PAGE_START);
header.add(m_toolbar, BorderLayout.PAGE_START);
header.add(gridit, BorderLayout.CENTER);
m_toolbar.add(m_output.getPrintButton());
m_toolbar.add(m_output.getSaveButton());
m_toolbar.add(m_clear_baseline);
m_clear_baseline.addActionListener(
new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
baselineSet = false;
m_output.setText(INFO_TEXT);
}
});
gridit.add(new JLabel("Product Life (Years)"));
gridit.add(m_productLifeYears);
gridit.add(new JLabel("Initial Cost ($)"));
gridit.add(m_initalCostSpinner);
gridit.add(new JLabel("Minimum Rate of Return"));
gridit.add(m_returnSpinner);
gridit.add(new JLabel("Maximum Payback Period (Years)"));
gridit.add(m_MaximumPaybackPeriodSpinner);
m_output.setContentType("text/html");
m_scroller.setViewportView(m_output);
m_output.setText(INFO_TEXT);
}
@Override
public void generate(PredictionModel model) {
// Start time must be at least a year after end time.
if (!model.getStartTime().plusTime(new TimeDelta(365)).before(model.getEndTime())) {
return;
}
BillDisplay bd = new BillDisplay(1);
bd.generate(model);
if (!baselineSet) {
try {
lbsCO2Baseline = bd.getLbsCO2Year(); // (Double) ipc.get("lbsCO2Year");
lbsSO2Baseline = bd.getLbsSO2Year();
lbsNOxBaseline = bd.getLbsNOxYear();
lbsHGBaseline = bd.getLbsHgYear();
lbsCH4Baseline = bd.getLbsCH4Year();
lbsN2OBaseline = bd.getLbsN2OYear();
billTotals = bd.getFirstYearBills();
} catch (Exception e) {
m_logger.error(e.getMessage(), e);
throw new IllegalArgumentException(
"The needed params could not be found, perhaps you are missing a plugin.");
}
lastStart = model.getStartTime();
lastEnd = model.getEndTime();
m_output.setText(
"Baseline is ready, make your changes now, and re-generate the model to see effects.");
baselineSet = true;
} else {
if (!model.getStartTime().equals(lastStart) || !model.getEndTime().equals(lastEnd)) {
m_output.setText(
"The date params have changed! Clear the baseline, or re set the start and end times to:"
+ "Start: "
+ lastStart
+ " end: "
+ lastEnd);
return;
}
generateBaselineOutput(bd);
}
}
/** @param args */
public void generateBaselineOutput(BillDisplay bd) {
double NPV;
// Savings is just $Baseline run - $ modified Run for all the bills in that year
double lbsCO2SavedLifetime = lbsCO2Baseline - bd.getLbsCO2Year();
double lbsSO2SavedLifetime = lbsSO2Baseline - bd.getLbsSO2Year();
double lbsNOxSavedLifetime = lbsNOxBaseline - bd.getLbsNOxYear();
double lbsHGSavedLifetime = lbsHGBaseline - bd.getLbsHgYear();
double lbsCH4SavedLifetime = lbsCH4Baseline - bd.getLbsCH4Year();
double lbsN2OSavedLifetime = lbsN2OBaseline - bd.getLbsN2OYear();
double[] secondBills = bd.getFirstYearBills();
// Sum these from the emissions report. Baseline Emissions - modified emissions.
final double productLifetime = m_productLifeYears.getDouble();
double[] Savings = new double[billTotals.length];
for (int i = 0; i < secondBills.length; i++) Savings[i] = billTotals[i] - secondBills[i];
System.out.println(Arrays.toString(billTotals));
System.out.println(Arrays.toString(secondBills));
System.out.println(Arrays.toString(Savings));
double yearlySavings = 0;
for (int i = 0; i < billTotals.length; i++) yearlySavings += Savings[i];
System.out.println(yearlySavings);
double NPVZero;
double InternalRateOfReturn;
// User Inputs
double InitialCost = m_initalCostSpinner.getDouble();
double MinimumRateofReturn = m_returnSpinner.getDouble();
double MaximumPaybackPeriod = m_MaximumPaybackPeriodSpinner.getDouble();
// End User Inputs
InternalRateOfReturn = 999999;
NPVZero = 99999;
double PaybackPeriodDec = 0;
double SumofCashflows = -InitialCost;
for (double i = 0; i <= 2000; i++) {
if (NPVZero >= 0) {
InternalRateOfReturn = 0 + i / 1000;
NPVZero = 0;
for (int Year = 0; Year <= productLifetime; Year++) {
if (Year == 0)
NPVZero =
(-InitialCost + yearlySavings) / (Math.pow((1 + InternalRateOfReturn), Year))
+ NPVZero;
else NPVZero = yearlySavings / (Math.pow((1 + InternalRateOfReturn), Year)) + NPVZero;
}
}
}
boolean PaybackPeriodFlag = true;
double PaybackPeriod;
PaybackPeriod = 100;
NPV = 0;
for (int Year = 0; Year <= productLifetime; Year++) {
if (Year == 0)
NPV = (-InitialCost + yearlySavings) / (Math.pow((1 + MinimumRateofReturn), Year)) + NPV;
else NPV = yearlySavings / (Math.pow((1 + MinimumRateofReturn), Year)) + NPV;
SumofCashflows = yearlySavings + SumofCashflows;
if (SumofCashflows >= 0 && PaybackPeriodFlag) {
PaybackPeriodDec = 1 - SumofCashflows / yearlySavings;
PaybackPeriod = Year - 1 + PaybackPeriodDec;
PaybackPeriodFlag = false;
}
}
String document = "";
document += generateRow("Financial Report", "");
document += generateRow("Initial Cost", String.format("$ %.2f", InitialCost));
document += generateRow("Product Lifetime", m_productLifeYears.getDouble() + " Years");
document +=
generateRow(
"Maximum Allowed Payback Period", String.format("%.2f Years", MaximumPaybackPeriod));
document +=
generateRow(
"Minimum Rate of Return", Math.round(MinimumRateofReturn * 10000) / 100.0 + " %");
document += generateRow("Predicted Payback Period", String.format("%.2f Years", PaybackPeriod));
document +=
generateRow(
"PredictedInternal Rate Of Return",
Math.round(InternalRateOfReturn * 10000) / 100.0,
" %");
document += generateRow("Predicted Net Present Value", String.format("$ %.2f", NPV));
document += generateRow("Yearly savings", yearlySavings);
if (InternalRateOfReturn >= MinimumRateofReturn
&& PaybackPeriod <= MaximumPaybackPeriod
&& NPV >= 0) document += generateRow("Is Measure Reccomended?", "Yes");
else document += generateRow("Is Measure Reccomended?", "No");
document += generateRow("", "");
document += generateRow("", "");
document += generateRow("Emissions Report (Yearly Savings)");
document += generateRow("", "");
document += generateRow("CO2 Saved", lbsCO2SavedLifetime + " lbs/yr");
document += generateRow("SO2 Saved", lbsSO2SavedLifetime + " lbs/yr");
document += generateRow("NOx Saved", lbsNOxSavedLifetime + " lbs/yr");
document += generateRow("HG Saved", lbsHGSavedLifetime + " lbs/yr");
document += generateRow("CH4 Saved", lbsCH4SavedLifetime + " lbs/yr");
document += generateRow("N2O Saved", lbsN2OSavedLifetime + " lbs/yr");
document += generateRow("", "");
document += generateRow("Emissions Report (Lifetime Savings)");
document += generateRow("", "");
document += generateRow("CO2 Saved", lbsCO2SavedLifetime * productLifetime + " lbs");
document += generateRow("SO2 Saved", lbsSO2SavedLifetime * productLifetime + " lbs");
document += generateRow("NOx Saved", lbsNOxSavedLifetime * productLifetime + " lbs");
document += generateRow("HG Saved", lbsHGSavedLifetime * productLifetime + " lbs");
document += generateRow("CH4 Saved", lbsCH4SavedLifetime * productLifetime + " lbs");
document += generateRow("N2O Saved", lbsN2OSavedLifetime * productLifetime + " lbs");
m_output.setText(document);
}