energy management solutions that reduce costs
TRANSCRIPT
Energy Management Solutions that Reduce Costs
Presented by:
Janie Jefferies-FreerVP Sales, eSight Energy Group
Hosted By: Building Engines
Wednesday, June 9th, 2010
1. Introduction
2. Challenges in implementing an
Energy Management System (EMS)
3. Components of an EMS
4. Techniques for energy reduction
5. Demonstrable ROI
6. Client case studies
Agenda
6.9.10: Energy Management Solutions That Reduce Costs
Janie Jefferies-FreereSight Energy, Inc.www.eightenergy.com
Health CareProcess & Industrial Government Retail EducationProperty Management
Introduction
Q: What is Energy Management?
A continuous planning process that drives the efficient use of energy in a building or process
Q: What does it mean today?
A focus on cost reduction and conformance to emerging best practices and legislation
6.9.10: Energy Management Solutions That Reduce Costs
If you can’t measure it, you can’t manage it.
• Organizations look towards energy reductions to achieve cost savings
• Driven by energy costs, legislation or desire for corporate social responsibility
• Energy Management System (EMS) ensures visibility. Otherwise, data is low frequency, manually input, unreliable
• It can be seen as extremely expensive or complicated to implement an EMS project
• Where to start??
6.9.10: Energy Management Solutions That Reduce Costs
Chapter 1Challenges in Implementing and Energy Management System (EMS)
• Multiple sites with data in disparate systems
• Multiple data sources (occupancy, temperature, production)
• Limits on energy/utility types that can be measured
• Diverse, incompatible protocols
• Limited data access/manipulation
• Concern over project cost and ROI
Major Challenges:
6.9.10: Energy Management Solutions That Reduce Costs
Chapter 1Challenges in Implementing and Energy Management System (EMS)
Actual vs. metered usage
Determine infrastructure:
• BAS, meters, submeters
• Supplier data
• Disparate data sources
Chapter 1Challenges in Implementing and Energy Management System (EMS)
Getting Started: Keep it Simple
6.9.10: Energy Management Solutions That Reduce Costs
Phased approach:
1. Implement formal energy policy
2. Seek outside help
3. Determine budget vs. payback
- How much is it worth to you?
- Determine what you need
Chapter 1Challenges in Implementing and Energy Management System (EMS)
Getting Started: Keep it Simple
6.9.10: Energy Management Solutions That Reduce Costs
6.9.10: Energy Management Solutions That Reduce Costs
Chapter 2Components of an Energy Management System (EMS)
1. Identify
2. Analyze
3. Quantify
4. Reduce
What Steps to Take?
Installing an energy management system (EMS) should be the first step towards reducing energy
Metering/Energy Data
• Metering (main meters / secondary meters)• Building Automation System• Utility bills• Manual meter readings
Automatic Data Collection• Log data every 5/15/30 minutes• Communicate readings to a PC or server
Energy Management Software (EMS)• Concise analysis of energy data• Targeted techniques for finding savings• Energy alarms and reporting
Energy Management Components
Chapter 2Components of an Energy Management System (EMS)
6.9.10: Energy Management Solutions That Reduce Costs
DC From Loggers, BAS etc
Central Energy Management team or FM
company, Operations, Maintenance ,
Consultants
Office Staff
Management
Consultants
End Users
Centralized energy management system
Data distributed outon a need-to-know
basis by department or meter / user etc
Utilize methods to gather disparate data into a single, centralized
database. Not just energy data, but ‘peripheral’ data
Data collected from multiple locations (sites, buildings, departments) potentially worldwide
Chapter 2Components of an Energy Management System (EMS)
6.9.10: Energy Management Solutions That Reduce Costs
THE PROCESS OF ENERGY MANAGEMENT
Data Collection
Identify Energy Usage
Optimization Exception Reporting
Benchmark sites and identify how and where energy is being used
Optimize the control process, reduce set points, turn systems off and reduce base load
Produce regular reports and build exception reports that tell you when the optimization is not working
Collect data for some weeks or months to enable base-lines to be set
6.9.10: Energy Management Solutions That Reduce Costs
Chapter 2Components of an Energy Management System (EMS)
ElectricityGas
Water
Degree Day or localized air temperature values
Production Values Building Occupancy
SteamCompressed Air
Oil
Financial(utility bills, utility tariffs)
DATA COLLECTION Data Identify Optimize Report
Chapter 2Components of an Energy Management System (EMS)
6.9.10: Energy Management Solutions That Reduce Costs
Data Identify Optimize Report
By bringing together all factors affecting energy usage, you gain:
• Holistic view of energy usage and driving factors behind it (temperature, occupancy, ft2, production values etc)
• Ability to normalize depending on variances (temperature, occupancy, ft2 ,production values etc. )
• Ability to reconcile costs and perform very accurate cost analysis
• Understanding of total usage and how it breaks down across site
Essential to be able to monitor data from all utilities/factors that affect usage
Chapter 2Components of an Energy Management System (EMS)
6.9.10: Energy Management Solutions That Reduce Costs
IDENTIFY ENERGY USAGE
OPTIMIZATION Data Identify Optimize Report
An EMS incorporates many targeted techniques for accurate data analysis
• Techniques are ‘over and above’ those utilized within property BAS
• Time saving – eliminates manual ‘number crunching’
• Ability to view high level usage with drill-down to equipment level
• Optimizes equipment operation (e.g. HVAC, lighting) to reduce overall energy usage
• Automatically highlights problem areas (e.g. changes in control equipment settings)
• Automatic notifications based on site/user/timeframe etc. (baseload, set points, cost
analysis, load balancing, peak demand etc all reported automatically)
Chapter 2Components of an Energy Management System (EMS)
6.9.10: Energy Management Solutions That Reduce Costs
REPORT
Chapter 2Components of an Energy Management System (EMS)
EMS Building Integration
Energy Analysis
Reporting Cost Analysis
Normalization& Target Setting
EmissionsManagement
Alarm Handling
EMS Server – Internet / Corporate Network
Tenant Billing
Internet / Network access to EMS by trained users
Access to energy data viadashboards for
END USERS
Energy usage, temperature, occupancy, production values, ft2, cost data etc
Data Identify Optimize Report
Dynamic dashboards can present data in an informative and user friendly way, suitable for any ability level
Chapter 2Components of an Energy Management System (EMS)
Regression analysis can be used to compare energy consumption against a driving factor such as temperature, hotel guests, production volumes.
Ene
rgy
used
Base load
Drift
Drift
Aim
Aim
Activity – compressing air, generating steam, cans of beer, degree days
REGRESSION – ENERGY EFFICIENCY
Energy v Degree Days or other driving factorsFt‘2, occupancy, degree days
NORMALIZATION
Jan Feb Mar Apr May Jun Jly Aug Sep Oct Nov Dec-30
-20
-10
0
10
20
30
40Average Temperature Oslo
Month
oC
Energy Temperature Curve
Utilize methods to account for energy v significant changes in outside air temperature – either with electricity or natural gas
More than just degree day normalization
Electricity reduction project for St James Hospital in Dublin
IdentifyInitial analysis of electricity use on the wards highlighted a higher than expected base load.
ProjectTen energy champions were identified and a project initiated to check and reset timers back to correct values.
Base load
Reviewing and resetting timer schedules reduced base load and achieved a saving of $37,000 per year
Base Load Analysis
Analysis of electricity use.
39% of the electricity consumption is out-of hours due to IT and air conditioning
This represents a cost of $850 per week - $45,000 annually
Specific Energy Consumption
Carlsberg use 28 million kWh of energy in the brewing process.
Recovers 4 million kWh of energy from vapour heat exchanger.
Number of Brews
Amount of hot water per Brew
Recovering heat from the vapour produced from a copper boiler provides hot water at 95o for use elsewhere in the brewing process.
SEC Analysis monitors the amount of hot water recovered per brew.
With improved heat recovery and other energy reduction techniques, Carlsberg have been able to reduce their kWh per hectolitre (kWh/hl) by 14%
How do you save real $$s?
Understand the characteristics of your site• Different techniques for different sectors
• Performance analysis, benchmarking sites
• Normalization of data
• Verification of utility billing information
Look at top level data to identify anomalies
Analyze data using targeted techniques to generate actionable intelligence (rather then just
‘number crunch’)
• Save 5-20% in energy usage
• Significantly reduce costs with powerful techniques targeted towards specific areas of usage
• Brings together energy data into a single, centralized database - doing this gives you an holistic view of what is occurring
• Automated exception alerts
• Validate utility bills against internal data
• Engage staff by sharing information via dashboards
BENEFITS OF AN EMS
For More Information:
Janie [email protected]
eSight Energy GroupWebsite: www.esightenergy.com
Sarah [email protected]: 781-314-9346
Building Engines, Inc.Website: www.buildingengines.comBlog:www.blog.buildingengines.com
275 Wyman StreetSte. 111Waltham, MA 02451781.290.5300
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