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Evaluation of Danish energy
    efficiency programs
 - What gaps exist in the evaluation of EE
         multiple benefits?

   Mikael Togeby, Ea Energy Analyses
      Erik Gudbjerg, LokalEnergi
Production of liquid gasses
• Temperature of the cooling water influence
  on the energy consumption
    – Systematic metering, indicated rising
      temperature over time, due to smudge of the
      heat exchanger.
    – In spite of chemical treatment of the cooling
      water.
• Investigation suggested an ozone unit
  together with a sand filter
    – Temperature decreased with 1-2 degrees
• Energy saving: 153 MWh/year
    – Energy-only-payback: 3.6 years
    – Energy+chemical+reduced-labour-costs-
      payback: 0.5 year

2
Optimal diffuser design in fish farm
  Traditional Trout Farm                               Model Trout Farm




• Environment
   – Restricted feed quotas and restriction on water
     intake from the water course
• Increase in production
   •   2.5 higher production with same water intake
EVALUATION DESIGN


4
Examples
• Evaluation of energy efficiency obligation for
  energy companies
    – Ongoing
• Evaluation of Knowledge centre for energy
  efficiency in buildings
    – 2012
• Evaluation of all Danish energy efficiency
  activities
    – 2008

5
Non energy benefits
• Non energy benefits can be very individual
    –   Improvement of building (maintenance)
    –   Productivity
    –   Ease of use
    –   Aesthetics
    –   Comfort
• End users are qualified to evaluate all these
  impact
    – Asking about overall satisfaction can reveal relevant
      information
    – Ask about the relative importance of energy and non-
      energy benefits

6
Evaluation of all Danish energy
              efficiency activities
General features                      NEB evaluation
Portfolio evaluation                  Questions about the overall satisfaction
Interviews based on experience with
concrete projects
Use of control groups
Focus on net impact (free riders)
Massive impact on Danish energy
efficiency policy




7
Evaluation of Knowledge centre for
       energy efficiency in buildings

General features                          NEB evaluation
Review type of evaluation: Existing       Questions about the overall satisfaction
documents, interview with knowledge
centre
Interview with target group and control
group




8
Evaluation of energy efficiency
       obligation for energy companies

General features                           NEB evaluation
Triangulation: Review of documentation /   Questions about the overall satisfaction
Interview with installers and end-users    to end-users
Control group                              Questions about the overall satisfaction
                                           to installers
Statistical analyses about net impact




9
Policy instruments
• End-users are strong decision makers
     – Know how to weight
        • Economic other benefits
        • Energy and non-energy benefits
• Some policy instruments are better in activating
  NEB
     – Taxes
        • All decision-making is left to end-user
     – Danish obligation for energy companies
        • Flexibility in designing instruments: End-users have an
          important say
     – The contrast: Labelling of house (old version)
        • Expert produce energy report based on in-flexible rules

10
Conclusion
• Many energy efficiency activities have
  challenges with net impact
     – Important to maintain this focus in evaluations
• Non energy benefits can be included
     – Asking about overall satisfaction
     – Asking about the relative benefit
        • Energy impact
        • All other impact


11
Danish NEB project
• Documentation of cases
     – Fish industries
     – Building materials
• Process and supply functions (pressurized air,
  ventilation, boilers, lighting)
     – Focus on productivity and reduction of failure rate
     – Analyses of accuracy and sources of error in NEB
       estimation
• Start in 2012 and completed in 2013

12
Thank you!
• Feedback is welcomed
     – Mikael Togeby, mt@eaea.dk
     – Erik Gudbjerg, eg@lokalenergi.dk


Paper about 2008 portfolio evaluation and its
impact on policy:
     – Energy Efficiency
       (2012) 5:37–49

13

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Evaluation of Danish Energy Efficiency Programs

  • 1. Evaluation of Danish energy efficiency programs - What gaps exist in the evaluation of EE multiple benefits? Mikael Togeby, Ea Energy Analyses Erik Gudbjerg, LokalEnergi
  • 2. Production of liquid gasses • Temperature of the cooling water influence on the energy consumption – Systematic metering, indicated rising temperature over time, due to smudge of the heat exchanger. – In spite of chemical treatment of the cooling water. • Investigation suggested an ozone unit together with a sand filter – Temperature decreased with 1-2 degrees • Energy saving: 153 MWh/year – Energy-only-payback: 3.6 years – Energy+chemical+reduced-labour-costs- payback: 0.5 year 2
  • 3. Optimal diffuser design in fish farm Traditional Trout Farm Model Trout Farm • Environment – Restricted feed quotas and restriction on water intake from the water course • Increase in production • 2.5 higher production with same water intake
  • 5. Examples • Evaluation of energy efficiency obligation for energy companies – Ongoing • Evaluation of Knowledge centre for energy efficiency in buildings – 2012 • Evaluation of all Danish energy efficiency activities – 2008 5
  • 6. Non energy benefits • Non energy benefits can be very individual – Improvement of building (maintenance) – Productivity – Ease of use – Aesthetics – Comfort • End users are qualified to evaluate all these impact – Asking about overall satisfaction can reveal relevant information – Ask about the relative importance of energy and non- energy benefits 6
  • 7. Evaluation of all Danish energy efficiency activities General features NEB evaluation Portfolio evaluation Questions about the overall satisfaction Interviews based on experience with concrete projects Use of control groups Focus on net impact (free riders) Massive impact on Danish energy efficiency policy 7
  • 8. Evaluation of Knowledge centre for energy efficiency in buildings General features NEB evaluation Review type of evaluation: Existing Questions about the overall satisfaction documents, interview with knowledge centre Interview with target group and control group 8
  • 9. Evaluation of energy efficiency obligation for energy companies General features NEB evaluation Triangulation: Review of documentation / Questions about the overall satisfaction Interview with installers and end-users to end-users Control group Questions about the overall satisfaction to installers Statistical analyses about net impact 9
  • 10. Policy instruments • End-users are strong decision makers – Know how to weight • Economic other benefits • Energy and non-energy benefits • Some policy instruments are better in activating NEB – Taxes • All decision-making is left to end-user – Danish obligation for energy companies • Flexibility in designing instruments: End-users have an important say – The contrast: Labelling of house (old version) • Expert produce energy report based on in-flexible rules 10
  • 11. Conclusion • Many energy efficiency activities have challenges with net impact – Important to maintain this focus in evaluations • Non energy benefits can be included – Asking about overall satisfaction – Asking about the relative benefit • Energy impact • All other impact 11
  • 12. Danish NEB project • Documentation of cases – Fish industries – Building materials • Process and supply functions (pressurized air, ventilation, boilers, lighting) – Focus on productivity and reduction of failure rate – Analyses of accuracy and sources of error in NEB estimation • Start in 2012 and completed in 2013 12
  • 13. Thank you! • Feedback is welcomed – Mikael Togeby, mt@eaea.dk – Erik Gudbjerg, eg@lokalenergi.dk Paper about 2008 portfolio evaluation and its impact on policy: – Energy Efficiency (2012) 5:37–49 13