City Operations:
Energy Use and Emissions




     City of Houston
     August 28, 2009
Framework for Sustainability:
  Leading the Way

• Buildings and Homes: Reduce energy consumption per square foot
  throug...
Emissions Tracking

• Measuring progress – emissions reporting/accounting
• Possible inventory requirements of a Cap-and-T...
MERP Methodology

     Step 1:                             Step 2:                             Step 3:
Scope, quantify, & ...
Results: 2005 Baseline Inventory

                                                        Pollutant
       Source         ...
Emissions Reduction Goals

                                       GHGs                                         NOx
       ...
Pollutant (tpy)
                           Source             GHG           NOx       VOC
Buildings and Facilities by Depa...
Building Retrofits
                          GHGs                                               NOx                       ...
Building Retrofits

• Partnership between Clinton Climate Initiative (CCI), Energy
  Services Companies (ESCOs), and City ...
10
Scope

-39 WWTPs, 420 lift stations
-230 MGD treated
   -564 permitted
-625 square miles of service area
      q
-Populati...
Wastewater Goals


1) Reduce energy use
2) Decrease emissions
3) More sustainable operations
4) Disaster resiliency
5) Com...
Potential Solution:


Performance Contracting
     - partner with ESCO(s)
     - financing options
RFQ – asked for qualifi...
Solar Energy:
  Solar Bees® Pilot
• Problem: seasonal algal blooms in Lake Houston drinking
                              ...
Combined Heat and Power
  System (CHP)
• City of Houston Wastewater Treatment Plants (WWTPs)
  consume significant amounts...
3 Take-Aways from Houston

• Practical and feasible solutions to address impacts of City of
  Houston operations
• Majorit...
Contact Information

• Emissions Reduction Plan
   http://www.greenhoustontx.gov/reports

•K lP
 Karl Pepple, Di
         ...
Questions




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2009-08-28 City Operations: Energy Use and Emissions

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Karl Pepple, Director of Environmental Programming with the City of Houston. He reviewed the City of Houston's wastewater treatment energy expenditures and emissions associated with that energy use.

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2009-08-28 City Operations: Energy Use and Emissions

  1. 1. City Operations: Energy Use and Emissions City of Houston August 28, 2009
  2. 2. Framework for Sustainability: Leading the Way • Buildings and Homes: Reduce energy consumption per square foot through increased energy efficiency measures and construction standards • Infrastructure: Increase energy productivity utilization and long term long-term reliability for major infrastructure • Energy Supplies: Embrace renewable energy sources to provide reliable, secure power for our region leveraging wind and solar resources • Transportation: Migrate to more fuel efficient, cleaner vehicles fleets across our region • Environmental Stewardship: Divert waste flow away from landfills to recycling paths. 2
  3. 3. Emissions Tracking • Measuring progress – emissions reporting/accounting • Possible inventory requirements of a Cap-and-Trade system • Houston’s approach • Past: 2010 Multi-Pollutant Emissions Reduction Plan (MERP) for City Operations • Present: conducting GHG emissions inventory for the community • Future: develop community-wide strategies for cost- savings, air quality improvement, and awareness 3
  4. 4. MERP Methodology Step 1: Step 2: Step 3: Scope, quantify, & Input data into ICLEI Record outputs, collect data Clean Air & Climate analyze, & develop Protection Software reduction strategies g Scope Quantification Time 2005 Entity City of Houston Government Operations By City department Pollutants GHGs, NOx, VOCs Short tons per year (tpy) Sources Mobile VMT & vehicle type Amount of fuel & fuel type A t ff l f lt Buildings/structures, streetlights/traffic Electricity (kWh) lights, WWTP, etc. Natural gas (MMBtu) Waste (municipal & residential) Tons of waste Waste composition 4
  5. 5. Results: 2005 Baseline Inventory Pollutant Source GHG NOx VOC Total tpy % of total tpy % of total tpy % of total tpy % of total Mobile Sources 88,522 4% 225 12% 206 67% 88,953 5% Buildings and Structures u d gs a d St uctu es 1,024,017 , , 52% 1,703 , 88% 100 33% 1,025,820 , , 52% Waste 856,309 43% 0 0% 0 0% 856,309 43% Total 1,968,848 100% 1,928 100% 306 100% 1,971,082 100% 100% 80% 2005 Baseline 60% Emissions 40% Inventory 20% 0% GHG NOx VOC 5
  6. 6. Emissions Reduction Goals GHGs NOx NO VOCs 2,500 2,500 2,145 Thousa tons pe year 400 Tons per year 2,124 1,928 340 Tons per year 2,000 2,000 1,629 306 306 er 1,969 1 969 y 1,895 300 1,752 1,500 1,500 1,703 229 1,139 206 210 1,024 1,393 882 1,000 200 1,000 and 856 886 100 111 96 773 500 225 250 236 100 500 89 99 97 - 0 0 0 0 - 0 0 2005 2010 2010 - 2005 2010 2010 2005 2010 2010 Base BAU Goal Base BAU Goal Base BAU Goal Mobile Sources Buildings and Structures g Waste Total 6 Note: Base = Baseline; BAU = Business as Usual
  7. 7. Pollutant (tpy) Source GHG NOx VOC Buildings and Facilities by Department Convention & Entertainment 40,910 65 2 Finance & Administration 171 0 0 General Services9 83,974 132 3 Health & Human Services 7,995 12 0 Houston Airport System 198,404 308 9 Library 7,533 12 0 Municipal Courts 3,036 5 0 Parks and Recreation 33,646 53 1 Public Works 26,986 42 1 Solid W S lid Waste 3,117 3 117 5 0 Parks Lights 201 0 0 Street Lights 90,542 143 4 Traffic Signals 17,295 17 295 27 1 Water Production and Wastewater Treatment 510,207 899 79 Total 1,024,017 1,703 100 7
  8. 8. Building Retrofits GHGs NOx VOCs 100,000 200 4 95,656 Tons per Year Tons pe year Tons pe year 80,000 151 3 3 85,964 150 3 er 60,000 er p 68,183 68 183 136 100 2 40,000 114 2 20,000 50 1 0 0 0 2005 2010 2010 2005 2010 2010 2005 2010 2010 Base BAU Goal Base BAU Goal Base BAU Goal GHG (tpy) NOx (tpy) VOC (tpy) 2005 Emissions Inventory 85,964 136 3 2010 Business As Usual 95,656 151 3 Building Retrofits* -27,472 -38 -1 2010 Goal 68,183 114 2 8 * Emissions reductions are expected to be slightly lower than estimated
  9. 9. Building Retrofits • Partnership between Clinton Climate Initiative (CCI), Energy Services Companies (ESCOs), and City of Houston (COH) • 262 buildings, 7 million square feet • Two ESCOs: TAC and Siemens •P j Project payback 7-12 years b k 12 • Contract guarantees 30% energy use reduction GHG (tpy) NOx (tpy) VOC (tpy) 2005 Emissions Inventory 85,964 136 3 2010 Business As Usual 95,656 151 3 Building Retrofits* -27,472 -38 -1 2010 Goal 68,183 114 2 9 * Emissions reductions are expected to be slightly lower than estimated
  10. 10. 10
  11. 11. Scope -39 WWTPs, 420 lift stations -230 MGD treated -564 permitted -625 square miles of service area q -Population of approximately 2.8 million -Region adding another 3 million by 2035 Region -Budget: $120 million -$37 for staff, $34 for electricity, $10 million f $37 f t ff f l t i it illi for chemicals, $7.5 for natural gas 11
  12. 12. Wastewater Goals 1) Reduce energy use 2) Decrease emissions 3) More sustainable operations 4) Disaster resiliency 5) Compliance with more protective (restrictive) water standards 12
  13. 13. Potential Solution: Performance Contracting - partner with ESCO(s) - financing options RFQ – asked for qualifications from ESCOs RFP - forthcoming 13
  14. 14. Solar Energy: Solar Bees® Pilot • Problem: seasonal algal blooms in Lake Houston drinking Houston, water source • Solution: solar-powered aeration mixers to prevent blooms Total annual cost savings: $769,000 $769 000 Annual energy avoidance: 2,190,000 kWh or $219,000 Annual chemical savings: 67% reduction in chemicals or $550,000 $550 000 14
  15. 15. Combined Heat and Power System (CHP) • City of Houston Wastewater Treatment Plants (WWTPs) consume significant amounts of electricity and natural gas • Partner with the Clinton Climate Initiative to pursue CHP at WWTPs • Installation of a CHP system at the Almeda-Sims WWTP: • 74% reduction in electricity use y • 39% increase in natural gas use • 1095 tons per year of CO2e emission reduction 15
  16. 16. 3 Take-Aways from Houston • Practical and feasible solutions to address impacts of City of Houston operations • Majority of projects lead to cost savings – driving force behind many projects (i.e. wind energy purchase) • Decouple growth from energy consumption Cool Globes This public art exhibit will feature 50 super-sized super sized Cool Globes that each convey a different message about what ordinary citizens can do to combat global warming. Coming to Houston October 8, 2009 16
  17. 17. Contact Information • Emissions Reduction Plan http://www.greenhoustontx.gov/reports •K lP Karl Pepple, Di l Director of E i f Environmental P l Programming i Mayor’s Office karl.pepple@cityofhouston.net • Jennifer Tsuda, Environmental Analyst Mayor’s Office y jennifer.tsuda@cityofhouston.net 17
  18. 18. Questions 18

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