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SEMCOG Energy Efficiency Seminar Considerations When Pursuing Energy Efficient Projects November 6, 2009 Manny Pervolarakis, CEM Principal Supervisor-

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Presentation on theme: "SEMCOG Energy Efficiency Seminar Considerations When Pursuing Energy Efficient Projects November 6, 2009 Manny Pervolarakis, CEM Principal Supervisor-"— Presentation transcript:

1 SEMCOG Energy Efficiency Seminar Considerations When Pursuing Energy Efficient Projects November 6, 2009 Manny Pervolarakis, CEM Principal Supervisor- Energy Partnership DTE Energy

2 -David R. Brower (1912 – 2000) “We may find that, while we're drastically cutting our energy consumption, we're actually raising our standard of living.” David Ross Brower (July 1, 1912 – November 5, 2000) was a prominent environmentalist and the founder of many environmental organizations, including the Sierra Club Foundation, the John Muir Institute for Environmental Studies, Friends of the Earth (1969), the League of Conservation Voters, Earth Island Institute (1982), North Cascades Conservation Council, and Fate of the Earth Conferences. From 1952 to 1969 he served as the first Executive Director of the Sierra Club, and served on its board three times: from ; ; and All technology should be assumed guilty until proven innocent. There is no business to be done on a dead planet November 6, 2009 Energy Seminar DEE CB-MSTR

3 Energy Conservation Opportunity (ECOs) Identification
Agenda Energy Conservation Opportunity (ECOs) Identification Value of an Energy Audit Prioritizing ECOs New Technology Assessment November 6, 2009 Energy Seminar

4 Where Do I Begin? Where Do I Begin? Energy Bills $$$ November 6, 2009
Energy Seminar

5 Project Identification
How do I identify energy projects (Energy Conservation Opportunities- ECOs)? How do I prioritize energy projects? Cost? Savings? New Technologies? November 6, 2009 Energy Seminar

6 How to identify Energy Conservation Opportunities- ECOs
Have an Energy Audit completed Preliminary Energy Assessment Detailed Energy Audit November 6, 2009 Energy Seminar

7 How to identify Energy Conservation Opportunities- ECOs
Do it yourself Assemble a Team Hire an outside Energy Auditor November 6, 2009 Energy Seminar

8 Determine Scope of Work The Facility and Equipment
Retail Lighting, small HVAC, small office equipment Grocery/C-Stores Refrigeration, small-med HVAC, Lighting, small equipment Warehouse/Distribution Large Refrigeration, medium HVAC, Lighting, Fork trucks Restaurant/Food Service Food prep, small HVAC, Lighting, Dishwashing, Hotel/Hospitality/ Recreation Centers Small to large HVAC, Lighting, Food Service, Laundry, Pools Government/Office Buildings/Banking Small to large HVAC, Lighting, office equipment Industrial Process Substantial variation in process equipment based on product; thermal processes, large motors, complex systems November 6, 2009 Energy Seminar

9 Gather Data Utility Usage History
12 to 36 months monthly energy usage – in Units and Dollars – both Gas and Electric Chart in Spreadsheet; look for abnormalities Review Actual Bill Check correct Tariff Billing Factor Sales Tax Billing Name and Address Start reading your meter(s) frequently and track November 6, 2009 Energy Seminar

10 The Facility Walkthrough / Inspection
Gather detailed data on the following systems: Billing Data Heating, Ventilation and Air Conditioning (HVAC) Building envelope (incl. Thermographic Analysis) Boiler and steam distribution. Electrical Systems. Motors. Lighting. Process Equipment. Air Compressors. Building envelope condition Ceiling height Ceiling insulation Wall insulation Doors Dock doors Windows Heating Temperature control Boiler and steam distribution system Electrical supply system Lighting Type Fixtures and wattages-rough number Fluorescent ,T8,T12,T5 Compact Fluorescent Incandescent HPS,LPS Hours of operation, Control windows, and reflective surfaces November 6, 2009 Energy Seminar DEE CB-MSTR

11 Get the Big Picture What are the physical boundaries of the space being looked at? (outside –v- inside common walls) Is there more than one meter? How is the space used/occupancy schedule Who/How controls temp, lighting, set-backs What equipment is used differently during different production schedules (max –v- average demand) November 6, 2009 Energy Seminar

12 Gather Data – what to collect
HVAC – type, size, age, condition, how controlled Lighting – type, fixture type, quantity, variation Equipment – what it is, input demand, operation schedule November 6, 2009 Energy Seminar

13 Gas and Electric Meters
Confirm Meter Numbers and Billing Factors Be sure that the billing information is correct and billing the correct space/account November 6, 2009 Energy Seminar

14 Gather Data – a few details
Look for evidence of things broken Most facilities have taken Energy Management Action long ago, but installation once does NOT mean it will always be working November 6, 2009 Energy Seminar

15 General Maintenance Look for things in poor condition or not taken care of Even good equipment fails when not maintained November 6, 2009 Energy Seminar

16 Age versus Condition Look for old things that should be replaced
Focus on improved Efficiency, not just because they are old November 6, 2009 Energy Seminar

17 Improper or Poor Installations
November 6, 2009 Energy Seminar

18 Space Heating What type of system(s) does the facility have?
Is there a more efficient system? Is replacement economical? November 618, 2009 Energy Seminar

19 Space Cooling Small tonnage, air cooled, LEAST efficient type
Expensive to replace, but, more expensive to operate less-efficient equipment November 6, 2009 Energy Seminar

20 Energy Saving Opportunities
Boiler Systems Condensate Return Make-up systems Blow downs Steam Optimization Steam traps Condensate return stations Steam Leaks Building Envelope Insulation Windows/ Doors Roofs HVAC Controls Shut down equipment Economizer (free cooling) Space temperatures and exhaust Compressed air systems Upgrade Controls to eliminate blow-offs System pressure Air leaks November 6, 2009 Energy Seminar

21 Energy Saving Opportunities
Lighting Systems Upgrade Fluorescent, including task lighting High Intensity Discharge HID lamp & fixtures Controls (sensors or programmable panels) HVAC Upgrades Controls for more efficient operation Air conditioned leakage Refrigerant lines VFD Facility Utility Tracking, Measuring & Trending Electrical Natural Gas Water Monitoring for lighting, HVAC, Process Equipment, Compressed Air etc. Energy Conservation Programs Weekend and Holiday Shutdowns Demand limiting (manual or automatic) Employee Incentives Programs November 6, 2009 Energy Seminar

22 Lighting Retrofit Opportunities
Incandescent to compact fluorescent T-12 Fluorescent to T-8 Fluorescent HID to T-8 or T-5 Fluorescent (warehouse, garage) HID (MV, LPS) to HID (HPS, MH) LED Exit Signs LED down-lighting, spot-lighting, room-lighting, wall-washing, exterior parking lot and street lighting November 6, 2009 Energy Seminar

23 Building Envelope All the components of the building envelope need to work together to keep a building warm in the winter and cool in the summer. November 6, 2009 Energy Seminar

24 Example - Check List Envelope Space HVAC Insulation
Equipments & lights schedule For heating hot water: balancing, modular boiler, boiler economizer For steam: condensate trap maintenance, modular boiler, boiler economizer For chilled water: balancing For air cooled: condenser surface condition For air system: exhaust fan schedule, economizer proper operation, diffusers & registers are not blocked, ductwork is cleaned. Infiltration Thermostat settings Door openings CO2 sensors Windows frames & shading Occupancy sensors Negative pressure in the building Timers Do not forget that the most energy efficient system is the system Designed per ASHRAE standards Installed per manufacturer recommendations Balanced well Controlled properly Maintained regularly November 6, 2009 Energy Seminar

25 Energy Conservation Programs - Compressed Air Leaks
24Hr/Day-100 PSI -$.09/kWh 1/16 inch $750 1/8 inch $3,000 1/4 inch $12,000 3/8 inch $27,000 1/2 inch $48,000 1/4 Inch-$12,000 1/8 Inch-$3,000 Data based on: 100 HP compressor 24 hour per day, 365 days per year operation Actual data will vary based on equipment size and operating schedule. Less savings may be realized on smaller equipment. However, more savings may be realized on larger equipment Savings are NOT Linear Non-Linear savings associated with 2 PSI drop. Savings percentage approaches zero as you continue to reduce the pressure. Idea is to find the optimum operating point at which no more savings can be obtained. Drop 2 PSI and save 1% energy cost. 20 HP Compressor full load is costing approximately $16,000/Year. November 6, 2009 Energy Seminar DEE CB-MSTR

26 Value of an Energy Audit
Identify biggest “Bang for the Buck” projects Identify project priorities based on budget, grant money available, etc. Identify operational issues with equipment Identify maintenance problems with equipment Opportunity to interview occupants of facilities to gain valuable insight and to get suggestions Compare energy usage to other similar buildings in area (baseline) Identify available Incentives and Rebates for ECOs (ie. Energy Optimization Program, etc.) Identify possible applications and options for using new technologies and renewable resources November 6, 2009 Energy Seminar

27 Prioritizing Energy Projects
No or Low Cost Projects Operational Changes Maintenance Re-commissioning Equipment Changing Habits Sensors/ Timers (shuts off automatically) Energy Awareness (educate employees) Energy Conservation Programs Create an Energy Policy November 6, 2009 Energy Seminar

28 Energy Awareness Adjust thermostat for savings! Every 1 degree down
Saves 2-3% off heating bill If you dial down 3 degrees (from 73 to 70) you can save nearly 10% of your bill Every time you raise your thermostat you are turning up your heating bill Pick a temperature that is best for your comfort and affordability The exception is if you require assistance from THAW or other agencies Money from agencies is very limited If you need help than you need to do your part and keep your thermostat at a lower temperature Agencies will only give money to people who are making an effort on their own November 6, 2009 Energy Seminar

29 Don’t assume it works… …just because it’s installed November 6, 2009
Energy Seminar

30 Economizer November 6, 2009 Energy Seminar

31 Economizer Use free cooling in Spring and Fall
Drop down temperature at night Use Demand Control Ventilation (CO2 sensors) November 6, 2009 Energy Seminar

32 Typical Simple Packback
Natural Gas Steam Systems 0.3 – 1.5 years HVAC 0.5 – 1.5 years Building Envelope & Insulation 0.5 – 20 years Electrical Compressed Air 0.2 – 1.3 years Lighting 1.5 – 6.0 years Chilled Water Systems 0.3 – 2.0 years November 6, 2009 Energy Seminar

33 Prioritizing Energy Projects
Projects requiring Capital Funding Replacing existing equipment with more efficient equipment (ie. lighting, hot water modular boilers, premium high efficiency motors, etc.) Increasing efficiency of existing equipment (ie. Installing VFDs on motors, capture waste heat and water for reuse) New Technologies (lighting, HVAC, etc.) Renewable Resources (solar, wind, biomass, geothermal) Decisions based on several factors (priorities): savings, cost, payback, environmental impacts (carbon footprint)? November 6, 2009 Energy Seminar

34 How do we Increase Boiler Efficiency?
Proper sized boiler Modular boiler Boiler economizer Regular maintenance/ tune-ups Even a new boiler efficiency is not more than 80%. It means than 20% of our input gas is going into the atmosphere. For old boiler this number can be up to 50%. Increasing boiler efficiency is a critical point. November 6, 2009 Energy Seminar

35 Modular Boilers Boiler efficiency can be increased by replacing a single boiler with a network of smaller modular boilers. Since modular boilers can be fired independently each module would be fired on demand at 100 percent capacity with load fluctuations being met by firing more or less boilers. When the first boiler can no longer keep up with the heat demand, a second boiler picks up the extra heat load. Also, modular boilers have low thermal inertia which provides rapid response and low heat-up and cool-down losses. The best way to get rid of cycling is modular boilers. One, two or three boilers will operate on the same time depending on the building load. November 6, 2009 Energy Seminar

36 Boiler Economizer The heat exchanger has been specifically designed to capture the maximum amount of energy from exhaust gases. Squeeze out an amazing 97% of all heat of combustion energy contained in the flue gases. A good way to increase boiler efficiency is to install an economizer on the exhaust flue. Exhaust gases are high temperature, about 600ºF. All this heat is wasted to the atmosphere. The economizer is a simply heat exchanger that picks up part of this heat and returns it to any type of water. It can be return condensate, return water, domestic hot water. It can be even preheated make up water or preheated combustion air intake. Economizer increases your boiler efficiency at least 5%. November 6, 2009 Energy Seminar

37 Environmental Impacts Saving 10,000 kWh (1
Environmental Impacts Saving 10,000 kWh (1.5 HP motor or ten 100 watt lamps) Help The Environment Reduces 20.9 tons of carbon dioxide Reduces 107 lb.. Of sulfur dioxide Reduces 45 lb.. Of nitrogen oxide Pollution associated with the emissions of more than 2.8 cars Equivalent of planting more than 3.8 Acres of trees November 6, 2009 Energy Seminar

38 DDC control November 6, 2009 Energy Seminar

39 New Technologies Many vendors coming out of woodwork with new technologies Don’t just take their word New technologies are generally more expensive than current technologies with longer paybacks New technologies may have unproven results and reliability due to infant stage How can customers evaluate products and services appropriately? November 6, 2009 Energy Seminar

40 New Technologies How can a customer make an informed decision?
Get required information from vendor How long on market Where has product been installed/ For how long/ Talk to contact Get data/ cut sheets from vendor Testing results (i.e. UL approved, etc.) Warrantees/ Guarantees Need unbiased opinions/ expertise Education (technical seminars, internet, etc.) Energy Manager assistance DTE Energy (vendor relationships, EO Pilot Program, incentives, expertise) November 6, 2009 Energy Seminar

41 Energy Manager Typical Duties
Energy Audits & Projects Conducts tours (audits) of facilities to identify energy saving opportunities. Identifies, analyzes, implements, and manages customer energy related projects to optimize energy utilization. Develops project proposals for energy conservation opportunities (ECOs), including project costs, savings, and payback analysis. Manages energy project schedule and budget to support customer expectations Actively researches existing and new products, services, and technology that provide value and optimize energy consumption. Provides technical support for any and all energy related issues. November 6, 2009 Energy Seminar

42 Energy Manager Typical Duties
Tracking & Optimizing Energy Usage Determine monthly energy usage for all facilities. Prepare tables and graphs to depict energy usage. Provide tracking, trending, reporting, and recommendations to reduce energy. Enhance EMS functions (if applicable) Provides daily customer on-site energy manager capabilities, including resolving billing inquiries, assisting in power quality and reliability issues, and other energy related specific concerns. Assist in identification and application for available energy efficient funding from state and federal programs November 6, 2009 Energy Seminar

43 Energy Manager Typical Duties
Develop Programs Develop Energy Awareness Program Supply energy saving information for each facility Develop posters, signage, displays, etc. Designate energy awareness week and perform energy seminars, demonstrations and prizes Establish Employee Recognition/Rewards Program Develop an Energy Curtailment Program Shut down equipment during off-hours or when not needed Develop plan and procedure Track/Trend curtailment results Reporting/ Communication November 6, 2009 Energy Seminar

44 Energy Manager Typical Duties
Communication and Training Attend and /or Lead Energy Meetings Develop Management Presentation Materials Create Conservation Articles/Newsletters Establish Communication and Technical Support to Facility Management Teams Educate Employees on Energy Saving Habits and “Best Practices” November 6, 2009 Energy Seminar

45 Energy Conservation Programs - Energy Awareness
Energy Awareness along with energy projects contributes to the overall energy reduction Year 1 Year 2 Year 3 November 6, 2009 Energy Seminar

46 Questions? November 6, 2009 Energy Seminar


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