Save 25% Off Your Utility Bills EVEN IF YOU HAVE IMPLEMENTED CONSERVATION MEASURES PREVIOUSLY! MEC Ohio Energy Conference February 22nd, 2011 H. Kelly Tisdale C.E.M., LEED AP Energy Services Division Manager The Brewer-Garrett Company 1800-686-6869 firstname.lastname@example.org
Agenda The Need to be Green Measuring Current Consumption Benchmarking Are you considered efficient or not when compared with similar Businesses Assessing Opportunities Rebate Programs Examine Cost and Savings for Energy Conservation Measures Lighting, Ventilation, Automation, Boilers, Chillers Sanity Checks – Are savings projections realistic New Technologies
Greener than Green“The least expensive and most environmentally friendly unit of energy is the one that is never needed!” 100 Watt Light Bulb run year round
100 Watt Light Bulb 1 MWhr 750 # of Coal 45,000 Cubic Feet (Balloons) of Carbon Dioxide
Greener than Green“The least expensive and most environmentally friendly unit of energy is the one that is never needed!” 100 Watt Light Bulb run year round This represents only about a 50th of what a US household consumes Today‟s technologies can reduce energy consumption up to 75%
Understanding Utility Bills - Electric Electric Bill 7000 6000 5000 4000 3000 2000 Air Conditioning 1000 0 HVAC Fans July January August November June February May March April October December September Plug Load Lighting kWh Month
Understanding Utility Bills - Gas Gas Utility - MCF of Gas 1200 1000 800 600 400 Heating 200 Cooking and Misc. 0 Hot Water July January August November June February May March April October December September Month
Measuring Current Consumption Convert everything to mmBtu… Gas – Total MCF MCF = 1 mmBtu Electricity – Total kWh 1 kWh = 3412 Btu Divide by 1,000,000 = mmBtu Example 1000 MCF = 1000 mmBtu 100,000 kWh = 341,200,000 Btu = 341.2 mmBtu
Benchmarking Know the total square footage for you facility – (example = 10,000 Utility = $225k mmBtu=1,341) Calculate mmBtu per square foot Example Total mmBtu = 1,341 Total square footage = 10,000 Total mmBtu per square foot = .1341
BenchmarkingTypical mmBtu per square foot Schools .03 - .08 Universities .10 - .17 Commercial .12 - .15 Industrials .12 - .25 Use EERE at Rutgers Energy Star
Rebate Programs Lighting Prescriptive Method Will pay $7 per Lamp for t-12 or $1 per t-8 $50 per HID fixture Occ. Sensors, Exit Signs, Parking Lots, Exterior, Motors, VFDs, Vending, Cooling, PC Power Management, etc. Custom Program $.08 per kWh and $100 per kW Includes anything that reduces electrical load that is permanently installedProcess- application, Pre-retrofit survey, Post Application, and Proof
Examine Energy ConservationOpportunities Lighting T-12 to T-8 T-8 to T-8 HID to T- 5 Assume cost at about $1.1 per square foot Assume savings at $.17 per square foot Example – 10,000 square foot facility $11,000 cost $1,700 annual savings
LED Benefits / Concerns Operational Savings Reduced recycling costs, Extremely long life, Vibration and orientation proof. Energy and HVAC Savings – Up to 50% in some cases. Instant-on capabilities 0-100% dimmability Color changing Exceptional Lamp Lumen Depreciation No UV, No IR, No Mercury Small size allows for many new designs and ideas from the ground up that could not have been possible before. Drawbacks? COST! Glare issues if not properly applied or designed.
Established Types of LED Products General Illumination Replacements Incandescent Halogen Downlights Linear Landscape Architectural Signage Area
Examine Energy ConservationOpportunities Ventilation Nearly 40% of your utility cost can come from conditioning outdoor air ASHRAE requirements allow for different control Potential Savings = .02 mmBtu per square foot Typically 2 – 4 year payback
Examine Energy ConservationOpportunities Building Automation Savings of 2% to 3% off total Utility Retro-Commissioning also 2% to 3% Cost is Low Payback typically < 1year to 3 years Night set-back Control Strategies
•The first HVAC controllers were pneumatic•The use of electromechanical relays in ladder logic, toswitch dampers became standardized.•The relays became electronic switches•By 1985, pneumatic control could no longer compete withthis new technology.•By the year 2000, computerized controllers were common•Today, some of these controllers can even be accessed byweb browsers and PDA’s?
Building Automation „Energy Harvesting Technology‟
Innovative BAS Solutions will.. Preserve existing investments in control and monitoring devices and integrate them with new standards-based technologies. Access and control through a standard web browser. Combine information from different systems to support better overall facility management. Increase flexibility of vendor selection Lower operational costs, improved facility operations, reduced energy costs, increased occupant/tenant satisfaction, and greater control, manageability, and security of building operations.
Examine Energy ConservationOpportunities Boilers (15 – 25 year ROI) Chillers (10 -20 year ROI) Occupancy Sensors (ventilation) Rooftops AHU‟s Processes Others Water conservation Air Dryers
Water Conservation New fixtures Save nearly 40% of bill Cooling Towers Deduct Meters Water Cooled Condensers <1year to 3 year paybacks Irrigation Deduct Meters Storm-water Management Retention Ponds / Pervious Surfaces / Gardens
Sample ProjectECM Investment Annual SavingsLighting $11,000 $1,700Ventilation $12,500 $3,000Auto / Cx $ 5,000 $1,500Mechanicals $15,000 $1,500Totals $43,500 $7,700Payback 5.65 years 29% of bill
Sanity Check < 20% = Very Conservative 20% to 25% = Good Target 25% to 35% = Aggressive Target > 35% = Caution