Simple Process Energy = constant + slope X production 151
152
Straight Line Formula • Y = mX + C • Energy (E) = Factor (F) * Driver (D) + Constant (c) • E = FD+c • In the previous case: • Gas = 47.947 * HDD + 14009 • This formula can be used to predict expected consumption for any given driver. • We can compare predicted vs actual usage to indicate performance. 153
Difference between expected and actual• Actual from bills• Expected from regression formula• Index = Actual/Expected • Highlighted cells are when index > 1 154
In General • Expected energy consumption can be any function of relevant driving factors D. • E = f(D1, D2, ……. Dn). • Use the simplest effective model. • A straight-line relationship is often good enough. 155
The Main Message • Establish relationships between energy consumptions and appropriate energy variables. • Single or multivariate regression. • Use these to calculate expected consumption based on production activity, prevailing weather, etc. • Thereby detect unexplained deviations. 156
Baselines• The baseline is the initial model. 157
Baseline Alternatives • Baseline will be used for future comparison of improvements. • Ideally based on regression analysis as shown. • Can be absolute consumption, e.g. 1 GWh per annum. • SEC: kWh per unit of output. • Not desirable or indicative of real improvement. 158
Targets • Alter the formula to reduce by targeted amount. • E.g. multiply coefficients by 0.95. 159
Historical Baseline Characteristic • Answers the question, “How much would I have used in the absence of my energy-saving measures?” • Allows absolute kWh savings to be computed. • Gives clean, objective view. • Production, weather, etc. already accounted for. 160
Cumulative savings can be trackedTotal Savings: ~€270,000 161
Baseload• The energy you use when there is no productive activity.• Very often a major opportunity for improvement.• Measure and analyse baseload if it is significant.• 14,009 m3/mth in this example. 162
Energy Performance Indicators (EnPI) • Budget vs actual consumption. • Actual vs expected or targeted consumption on a regular basis (e.g. daily, weekly or monthly). • CUSUM of total energy and of each SEU. 163
WHO SAYS THAT WE SHOULD ALWAYSCOMMUNICATE WITH SPREADSHEETS? 164
Example: Behavioural Campaign - Methods andInstrumentsManagement Measurable support and visibleFocus Competition / something at stake 165
Management Measurable Celebrate support and visible resultsFocus Competition Management / something Support at stake Well Set duration organizedCommunicate the goal Designate an Follow up Encourage the ambassador execution of ideas 166
Management Measurable Measurable support and visible and VisibleFocus Competition / Campaign- something at material/posters stake etc. Out of the System to Keep the potspreadsheet collect boiling ideas ... Motivation material? 167
Management Measurable Focus support and visible Themes?Focus Competition / ??? Cleaning something at Standby stake consum Campaign Cooling period 168
Management Measurable Competition support and visible Who are we competing against?Focus Competition / -Factory to Factory? something at -Within the department? stakeWhat are we competing on? What can we win? -Percent savings? -Best ideas? 169
Information Energy overview Well done results 170
Why do leaders ask for reports?• Documentation• To help plan• To initiate action• Anything else? 171
What is required in our Management • Basis for decision makingcommunication to • Objectivitymanagement and other • \"Have you taken into account ... ..?\"organizations? • Priority • Anything else?• Preference for details Technical ENPi Employees• Here detail is OK Department Complex• Defend recommendations to management (well documented)• Anything else?• Budget and predictability Finance • Visually explain “why?” Allocation of costs = Department Simplicity preference for key figures Anything else? Not technically minded Anything else? 172
Exercise• Discuss 2 by 2 - Starting from your own business:• What are your ambitions regarding energy savings? Goal? Success criteria? • What do you want to get from saving energy? (Pure economic consideration, cultural change, NEBs?)• How do you communicate internally about energy? -To whom? -How? -How often?• What?• What are the needs for communication?• What do you want to achieve with what you communicate?• How can you customize communication to the need? 173
End of day 3• Wrap up on day 3 174
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