Commercial Energy Assessments City of Ames Emily Rice The Energy Group

Overview Process for the Energy Management Program Energy Assessment Process Basic Energy Management Improvements Common Projects Identified Questions

Step 0: Motivate Energy Management Success directly depends on participation of occupants Stimulate employee interest and support through awareness “We reduced electric consumption by 13% this quarter and saved $210.”

Energy Management Program (EMP) Designate Responsibility Gather Usage and Cost Data Analyze Data & Perform Audits Evaluate Opportunities ImplementMonitor Results Evaluate Success and Establish New Goals

Energy Assessments Detailed Analysis of Capital- Intensive Modifications Energy Survey & AnalysisWalk-Through Assessment

Process Prepared By ©The Energy Group Co., Inc6 Forms and initial data collectedWalk-through conducted on-site TEG analyzes findings and usage & identifies cost-effective projects Results are communicated Building owner implements and cost savings are realized

Initial Data and TEG Forms Behavior and Operations Interview Building Survey Utility Release Form Prepared By ©The Energy Group Co., Inc7

Implementation Owner chooses projects to be implemented TEG can provide input for funding options Project encourages use of local contractors and suppliers Prepared By ©The Energy Group Co., Inc8

Current Usage Summary Prepared By ©The Energy Group Co., Inc9

Summary of Results Prepared By ©The Energy Group Co., Inc10

Basic Energy Management Tighten Current Systems Optimize Systems Operation Purchase More Efficient Replacement Systems

Tighten Current Systems Reduce Air Leakage Reduce Water Leakage Turn Off Lighting; Add Controls Use Temperature Setback Cool With Outside Air Seal Unused Vents/Ducts to the Outside Educate Tenants The most effective method to reduce energy usage, both environmentally and economically, is to conserve energy. Turning off systems when not in use or tightening up aged systems can achieve great results for little to no cost.

Optimize Systems Operation Training Operator Personnel Tuning Combustion Equipment Adjusting Gas Boilers Cleaning/Replacing Filters Cleaning Fan Blades & Ductwork Using Water Treatment A combination of operator training, preventative maintenance, and system adjustments will help tune energy systems to optimal performance; an ongoing process that is the third most effective method for reducing energy costs.

Purchase Efficient Replacements Lighting Systems & Lamps Heating & Cooling Equipment Energy Distribution Systems Motors Thermal Envelope Components Controls & Energy Management Systems This method is more expensive and less cost- effective than the others. It is crucial to calculate the costs to operate and install and weight them against the savings to determine feasibility.

Evaluating Energy Management Improvements Pacific Northwest Laboratory (PNL) discusses 118 improvements Each EMI can be quantitatively evaluated System Interaction and Payback are important considerations

Energy Management Improvements Lighting Exit Signs Ceiling/Roof Insulation HVAC Systems Occupancy Sensors Pool Cover Vending Machine Controller Thermostat Setback Weather-stripping Window/Door Replacement Thermal Window Shades Pipe Insulation Washing Machines Not every improvement was cost-effective or applicable for each building. Some owners expressed an interests in particular projects that are included regardless of feasibility. Rebates should be confirmed with the City of Ames prior to implementation. Prepared By ©The Energy Group Co., Inc16

Situation: City Hall with twenty computers currently operating fifty hours weekly and in sleep 118 hours over night and during the weekends. Example: Plug Load Result: Saves $244/year in operating costs. Solution: Timers to disconnect equipment for 100 hours weekly.

Example: Lighting As seen: 8 4-lamp T12 Lamps Magnetic Ballasts Operating 50 hrs/wk Costs $270 per year to light! Retrofitting ballasts and lamps could save $85 per year in one room.

Vending machines contain compressors that run constantly. Between the lighting and compressor annual operating costs are: Example: Vending Machines Controllers can save up to 40% on vending machines! Beverage Machine - $280 Snack Machine - $50

Sample Energy Assessment Facility is 19, 284 sq ft Facility operates 50 hrs/wk; 24/day in Police Station Goal: Analyze current usage and identify projects as part of whole-city study

Energy Use Benchmark: 129,305 Btu per ft 2 kWh = per year

Steps Taken Initiated City-Wide Analysis Project Conducted Energy Audits on 50 Commercial Buildings, Including City Hall Reviewed Results & Implementing (Priority-Based)Will Continue to Evaluate Progress

Positives

Projects Annual Cost Avoidance Implementation Cost Simple Payback Fluorescent Upgrades$2,123$20, Compact Fluorescent$175$ Occupancy Sensors$18$ Radiant Heat$958$5, Weather-stripping$56$ Exit Sign Retrofit$59$ Total$3,389 $27,312N/A

Explore Financing Options Internal Funds Debt Financing Lease or Lease-Purchase Agreement Utility (or other) Incentives Private Programs Public Programs

Explore Financing Options cont’d Office of Energy Independence – BE$T Program – Grants Energy Efficiency & Renewable Energy – – Compiles Federal, State, & Local Resources

Emily Rice 2704 Easton Blvd Des Moines, IA Cell: Office: x212 Fax: