top 10 products that save money - david mcdougall, enernoc

Top Energy Efficiency Products

[6/15/2010]

Green Office Conference

[David McDougall][Manager of Analytics]

Building Are Full of Energy Savings Opportunities

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“Less than 5% of commercial buildings in the US are actually commissioned after construction.”

- BCS Partners

“Closing our ‘national electric productivity gap’ could curtail up to 30% of our power consumption.”

- Rocky Mountain Institute

“The average commercial building uses 26% more energy than needed.”

- DOE / Energy Star

It’s no surprise that commercial buildings are not as efficient as they could be! There is still ample room to improve efficiency in this space.

OK, But What Do I do? A Recipe For Success:

•Have a team, such as a green team, in place to review options and ensure tasks are implemented.

•There is no need to go it alone. Get help from utilities, engineers, peers, non-profits, and government resources.

• Know where the tax breaks and rebates are.

•Know where your building loads comes from. Conduct and internal audit and review. Use Portfolio Manager to benchmark.

• Consider a professional audit.

•Have a plan. Energy management should be as disciplined as financial management.

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1. Occupancy sensors

2. Photovoltaics

3. Frictionless chillers

4. Retro-commissioning / commissioning

5. Demand response

6. Bonus product: Variable frequency drives

Top Energy Savings Products and ServicesThese are some of products you may not be using that could save you money.

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Now that everyone has installed the most efficient lights, let’s control them.Savings from EPA study: The average office spends 29% of it’s electrical bill on lighting

Source– Bill Von Neida United States Environmental Protection Agency Green Lights ProgramUSEPA-6202J, 401 M Street, SW, Washington, DC 20460 E-Mail: vonneida.bill@epamail.eps.gov

1. Cost: $30-$130 each, plus installation

2. Resources Utility rep, electrician, in-house facilities staff

3. Links http://www.ies.org/ ,

4. Retrofit Payback: 1-2 years, less with new construction

5. Extra credit: Add dimmer controls for daylight harvesting

Essential information

•Total incentives for commercial buildings can reach 50% of the first cost

•Costs are dropping, increased panel and inverter supply, suppliers and capable contractors

•SRECs are a new added incentive

•ESCOs can often offer power for less than market rates. Beware of high escalator clauses.

•Paybacks can be as low as 3 years

Photovoltaics (PV): It’s time to consider solar as an investment Solar highlights for Massachusetts

1. Net cost: $1-3 per installed kWh for commercial applications

2. Renewable energy tax credit $.03 / kWh, and SREC $3.25 /watt

3. Rebates and credits change often, get current and be prepared for new programs

4. Resources: http://www.dsireusa.org , http://www.masscec.com/index.cfm?pid=11052

5. Some Solar Providers http://www.nexamp.com/ , http://www.borregosolar.com/ma/ , http://www.solarmarket.com/ , http://www.ameresco.com/ , http://www.noresco.com/

PV Essential informationInterview Professionals

When you need to Replace Water Cooled Chillers, go TurbocoreFrictionless chillers are super efficientKey Contacts: Mechanical Contractor, Utility Representative

RCx Retro-Commissioning

A systematic, documented process that identifies low-cost operational and maintenance improvements in existing buildings and brings the buildings up to the design intentions of its current usage.

Why?: Because buildings rarely operate as designed.

“Top 10” RCx Opp – for Energy Savings (from Building Commissioning Association)

10. Improve boiler efficiency/control

9. Reset Supply Air Static Pressure set-point

8. Terminal Unit tune-ups - dampers & valves

7. Return VFDs to variable speed operation

6. Lower condenser water temps/improve chiller sequence

5. Calibrate sensors and instrumentation

4. System level test & Balance (over air, over pumping)

3. Optimize/restore economizer operations

2. Eliminate simultaneous heating and cooling

1. Turn off equipment when not needed

Years

1.00

1.05

1.10

1.15

1.20

1.25

0.95

0.85

0.90

0.80

Normalized Energy Usage

Savings opportunitySavings Opportunity

No Commissioning With SiteSMART Commissioning Services

With SiteSMART Monitoring-based Commissioning

MBCx Continuous Monitoring and CommissioningBuilding performance naturally degrades over time. SiteSMART uses building data and powerful algorithms to identify savings opportunities.

Source: Lawrence Berkeley National Lab, Benchmarking Analysis of monitoring-based commissioning

Change in ScheduleAnnual savings = $21,000 CO2 avoidance = 102 tonnes

Savings Category No cost Action Recommended Enable auto-control. This unit was habitually overridden, but from continuous monitoring, each incidence was caught with minimal loss in energy savings. As a result of this measure new protocols were established for requesting off-hours usage to further limit this issue from re-occurring.

Example: Air Handling Schedules

Facility managers often don’t have the time to identify maintenance issues like equipment operating during off-hours. Increased costs are an undetected result.

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The AHU schedule (green) shows a regular daily schedule.SiteSMART found that actual operation (blue) was in constant over-ride.

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Demand response is a cost-effective and reliable way to meet peak demand. The alternative is to build generation and transmission capacity that will be used for only a fraction of a year.

0%

25%

50%

75%

100%

Winter Spring Summer Fall

% o

f S

yste

m P

eak

Dem

and

90%

>10% of infrastructure costs are spent to meet

peak demand that occurs less than 1% of the time

Annual US Electricity Demand - % of Peak

Demand Response OverviewDemand Response Overview

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Demand Response Overviewk

Wh

’s

24 Hours

$/k

Wh

24 Hours

Reliability/Security – DR can be brought to market more quickly and precisely than comparable generation or T&D, giving grid operators resources needed to better manage reliability NOW while paying end-users to tap into existing resources.

Price – DR can dramatically reduce pricing power of well-positioned generators and incentivizes end users to become active participants in energy markets – active participation keeps markets healthy and prices low.

Efficiency – Demand response raises the specter of efficiency. Increased end user market participation puts energy back on the business planner’s map and, when properly deployed, can save end-users 20% or more on energy bills.

Generation Capacity

Demand

kW

24 Hours

With EnerNOC

With EnerNOC

With EnerNOC

Demand response is achieved when end-users reduce their demand for electricity from the grid in response to market signals.

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Demand Response Overview

=

Grid operators must meet the demand of a control area’s aggregated load while meeting FERC’s reliability standard of downtime of no more than one day in ten years!

ERCOT Now Pays Load to Respond!!!

1 2

If Load Increases . . .

Build generator

Build generator

Build generator

Be more efficient

Curtail during critical peaks

Shift consumption

Plant 1’s Capacity

Plant 2’s Capacity

Plant 3’s Capacity+ +

Supply

+ +Your

Building’s Demand

Next Building’s Demand

Next Building’s Demand

Demand

Variable Frequency Drives (VFD)

•Speed control for motors (pumps, fans, compressors)

•Can save 75% on some devices

•What devices come on fully that could be controlled? (Ie. RTU or pumps

•Must have “inverter ready” motors

•Rebates are usually available.

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David McDougallManager of AnalyticsEnerNOC, Inc.

978-387-7626dmcdougall@enernoc.com

Thank You!