UN ICTY ENERGY ANALYSIS

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UN ICTY ENERGY ANALYSIS
BACKGROUND

• Building Description
• - c. 1953
• - Office space 16,000 m2
• - Gross space 33,000 m2 and
• - Staff of 900.
• 2005 Annual Energy Details
• - Gas use 500,000 m3 (16,000 GJ), cost
  155,000 Euros
• - Electricity use 500,000 kWh (46,000 GJ,
  cost 375,000 Euros and
• - Combined total for 2005 is 62,000 GJ (1,850
  GJ/m2),
• and annual cost of 530,000.
• Matters for Investigation
• - Increase of use and
• - Better utilization and savings.

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UN ICTY ENERGY ANALYSIS
BACKGROUND

• Goal
• - Reduce Energy Use by 10 within one year.
• Description of Work Proposed
• - Review and Analyze Invoices
• - Create Building Specific Energy Balance
• - Produce Benchmark Comparison
• - Investigate irregularities and
• - Propose Energy Saving Actions.
• Note
• - Time limited institution, so return period
  must be 3 to 5 years.

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UN ICTY ENERGY ANALYSIS
OVERVIEW

• Review of Energy Invoices
• - Errors were not identified and
• - Advised to lower contracted power.
• Energy Benchmark
• - Extremely inefficient building and
• - Two electricity and one heating balance
  performed
• Specifics and Savings Potentials Noted
• - Disparities between registered and calculated
  base loads
• - Disparities between 2004 and 2005 base loads
  and
• - Calculated maximum load in-line with
  registered load on invoices.

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UN ICTY ENERGY ANALYSIS
ACTION PROPOSED

• Ventilation, Heating and Cooling
• - Lower outside air quantity
• - Lower air-flow in offices
• - Install swirl air diffusers
• - Provide thermostatic valves on radiators
• - Estimated savings of 50 on ventilation, 30
  on heating,
• and 10 on cooling and
• - Estimated monetary details and implementation
  plan.
• Base Load Reduction
• - Accurate measurements
• - Inventorying equipment and
• - Further study recommended

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UN ICTY ENERGY ANALYSIS
ACTION PROPOSED

• Lighting
• - Install motion detectors
• - Invest in computerized lighting controls and
• - Consider renewal of old lights.
• Heat Generation
• - Consider ventilation heat recovery system and
• - Replace boilers/burners with higher efficiency
  ones.
• Cooling
• - Consider higher set points
• - Place chillers and water cooler off line
  during intermediately season
• - Lower delta T set points for chillers and
• - Check buffers on AC units to prevent cycling.

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UN ICTY ENERGY ANALYSIS
PROJECTS WITH MININAL INVESTEMNT

• Description Est. Annual Saving
• Decrease Contracted Electrical Power 5,000
  Euros
• Optimize Heating and Cooling Set Points 20,000
  Euros
• Lower Air Flow 25,000 Euros
• Reduce Based Load by
• - Turn off all PCs and Monitors 16,000 Euros
• - Turn off other equipment 19.000 Euros
• One-Hour Less Ventilation 6,000 Euros
• One-Hour Less Lights 12,000 Euros
• Estimated Annual Total 125,000 Euros
• Over Five Years Total 625,000 Euros

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UN ICTY ENERGY ANALYSIS
PROJECTS WITH SOME INVESTEMNT

• Overview
• - Items proposed are estimated to have annual
  savings of 225,000 Euros and a return period
  between 2 to 5 years.

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UN ICTY ENERGY ANALYSIS
SUMMARY

• Old inefficient building
• Rising use and cost of energy
• Identifications of wastes of energy
• Identifications of improvements without and with
  investments
• Investigate Local Law requiring on investments in
  improvements when pay back period is less than 5
  years
• Lower air flow to 40 to 50 m3/h and install
  swirl diffusers
• Install thermostatic valves
• Prepare action plans as indicated earlier and
  detailed in the report
• Estimated overall savings of 1,750,000 over 5
  years with the same return period on investment
  and
• Cost or report was 10,000 Euros.

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UN ICTY ENERGY ANALYSIS

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• QUESTIONS PLEASE?