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Session V: Automation & Control And Thermography
Topic: ENERGY MANAGEMENT SYSTEM
&
AUDIT OF ELECTRICAL SYSTEM
T PAUL KOSHYEAOC – LARSEN & TOUBRO LIMITED
EnCon in Electrical Systems
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GOLDEN RULES FOR CONSERVING ENERGY
Rule 1: Don’t use it in the first place
Rule 2: Maximise usage of natural sources of Energy
like Wind , Solar, Hydro, Tidal, Bio-gas etc.
Rule 3: Now , that anyway you are using it;
Maximise Efficiency and
Minimise Wastage
The Topic of this presentation is:
ENERGY MANAGEMENT SYSTEM
&
AUDIT OF ELECTRICAL SYSTEM
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Energy Management System (EMS)
EMS refers to a system in an organization to achieveenergy efficiency through well laid out procedures andmethods, and to ensure continual improvement, whichwill spread awareness of energy efficiency throughoutan entire organisation.
This system of computer-aided tools is used by operators of Electric UtilityGrids , Distribution networks and in Load Centers such as Industries,Buildings, Infrastructure etc. to monitor, control, and optimize theperformance of the generation, transmission , distribution and load controlsystems.
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BASIC EMS CAPABILITIESSchedulingSet-pointsAlarmsSafetiesBasic Monitoring and Trending
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•Using Spreadsheets for Graphing and
•Analyzing Trend Data
•Converting to Spreadsheet Format
•Opening Data Files
•Setting Up Graphs
ADVANCED FEATURES IN AN EMS
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•Types of Graphs
•Scaling
•Multiple Y-Axes
•Formatting
•Graphing One Parameter Against Another•Trends with Different Time-Steps
ADVANCED FEATURES IN AN EMS
Energy Management System
Measurement instruments like energy meters, water meter, gas and other devices provide the consumption (in kWh or thermal units) data for provider.
Data loggers tap the main electric supply to register the actual consumption.
Application to register and monitor the consumption
Transfer Point Supplier
Router
Electricity
Water
Heat
Gas
Intranet
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KEY FEATURES REQUIRED IN THE SOFTWARE FOR ANALYSIS
• Display in Graphical and Tabular.
• Sub Billing reports for different areas of plants or tenants.
• Graphical Display of Maximum Power Demand Analysisand support for pre-warning using Email or Alerts
• Support for differentiation of Electricity Board and DG power Consumption, Separate tariff can be configured to get accurate billing.
• Standard processing functions like Sum, Min, Max , Average in a standard, open MYSQL database 10
Graphical representation of load profile Consumption
Consumption and load profile graph for one or more channels can be viewed separately.
Comparison
The comparison between planned and actual consumption of power or between two modules or load profiles of two or more modules is possible.
Zooming Facility
Additionally there is a zooming facility to view consumption up to 5 min-hour – day – week – month and year. The graphics can be printed and soft copy can be downloaded too.
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Energy ProfileANALYZE ENERGY MANAGEMENT DATA !!
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Ener
gy C
on
sum
pti
on
(K
Wh
)
Hours
24 Hours Energy Consumption for AC Plant in South Block on 1st April 2010 (Thursday)
Switch off the chillers by 05:30 PM and run only the chilled water
pumps and AHU’S with existing chilled water in the circuit to meet
the cooling requirement in the floors. Annual Monetary Saving = Rs
2.63 lakhs
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Real Time Trend
Real time trend charts of any of the parameters can be viewed separately or together on a single screen for a particular meter.
Parameters Monitored
All the various parameters like Voltage, Current, Power Factor, Harmonics, Phase Distortions, Active Power, Reactive Power, Maximum Demand, etc can be monitored and graphically represented.
Energy Profile
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PREREQUISITES FOR OPTIMIZING EMS OPERATIONS
EMS DocumentationSequences of OperationCurrent Control StrategiesCalibration of EquipmentFunctional Testing
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ENHANCED FEATURES IN A ENERGY MANAGEMENT SYSTEM
•METERING DEPLOYMENT COUPLED WITH DEMAND RESPONSES•CAPABILITY TO LOAD SHIFT AND HELP SHIFT THE LOAD AWAY FROM THOSE PEAK TIMES
Control of ACB’s and Meters
Intelligent Multi-function meter
Tri-Vector Meter
ACB / MCCB with µprocessor Release
Intranet
Internet
Com Controller
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EVOLVING STRATEGIES IN EMS
•TO DRIVE AN INTEGRATION OF ALL SUBSYSTEMS AROUND THE UTILITY
•THIS CREATES MORE DATA FLOW AND WITH THAT CREATES THE OPPORTUNITY FOR ALGORITHMS TO OPTIMISE IT
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CHALLENGES EVOLVING IN IMPLEMENTATION OF A OVER-ENCOMPASSING EMS
•THERE IS NO SUCH THING AS A‘GREENFIELD UTILITY’• All of them essentially will have legacyissues arising from systems of various OEMs
• MAKING THESE SUB-SYSTEMS COMMUNICATE TO EACH OTHER IS AN ARDUOUS TASK FOR THE INTEGRATOR
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Non-Energy Control Applications
Maintenance ControlRemote EMS Operation (Internet Based)
Security ApplicationsIndustrial ApplicationsRetail Applications [ spot billing)Miscellaneous Applications
• CMMS – Computerised Maintenance Management System
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• Continuous monitoring of Consumption
• Consumption pattern identification
• Transparency in billing
• High grade of automation in billing process leading to time saving
• Common area consumption can be monitored and billing process can be optimized
• Real Time Trend Charts to monitor specific parameters continuously
BENEFITS OF HAVING AN EMS
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BENEFITS OF HAVING AN EMS
• Focus on the part of the energy value chain
that will drive the highest return on investment
• Easy to Control and Plan Energy Consumption
with no extra man-power.
• Areas of Wastage can be identified and Optimizedwith constant monitoring.
• Increase Accountability of business unit’s total expenses – including auditing, accruing and allocating energy costs according to actual use.
The 2nd Topic of this presentation is:
ENERGY MANAGEMENT SYSTEM
&
AUDIT OF ELECTRICAL SYSTEM
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Principle of an Energy Audit
When the object of study is an occupied building,
then reducing energy consumption while
maintaining or improving human comfort, health and
safety are of primary concern.
Beyond simply identifying the sources of energy
use, an energy audit seeks to prioritize the energy
uses according to the greatest to least cost effective
opportunities for energy savings.
Types of energy audit
The term energy audit is commonly used to describe a broad
spectrum of energy studies ranging from a
• Quick walk-through of a facility to identify major
problem areas to a
• Comprehensive analysis of the implications of
alternative energy efficiency measures sufficient to
satisfy the financial criteria of sophisticated investors.
The only way to ensure that a proposed audit will meet your
specific needs is to spell out those requirements in a detailed
scope of work.
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Preliminary auditThe preliminary audit (also called a simple audit,
screening audit or walk-through audit) involves
•minimal interviews with site-operating personnel,
•a brief review of facility utility bills and other
operating data, and
•a walk-through of the facility to become familiar
with the building operation and to identify any
glaring areas of energy waste or inefficiency.
Corrective measures are briefly described, and quick
estimates of implementation cost, potential operating
cost savings, and simple payback periods are provided.
audit.
General Audit(Also called a mini-audit, site energy audit or detailed energy audit or
complete site energy audit) expands on the preliminary audit .
• By collecting more detailed information about facility
operation and by performing a more detailed
evaluation of energy conservation measures.
•Utility bills are collected for a 12 to 36 month period
to allow the auditor to evaluate the facility's
energy/demand rate structures and energy usage
profiles.
•Sub Metering Data provides detailed energy profiles
that such data makes possible will typically be
analyzed for signs of energy waste .
General Audit•Additional metering of specific energy-consuming
systems is often performed to supplement utility data.
In-depth interviews with facility operating personnel are conducted to
provide a better understanding of major energy consuming systems and to
gain insight into short and longer term energy consumption patterns.
•This type of audit will be able to identify all energy-
conservation measures appropriate for the facility,
given its operating parameters.
A detailed financial analysis is performed for each measure based on
detailed implementation cost estimates, site-specific operating cost
savings, and the customer's investment criteria. Sufficient detail is provided
to justify project implementation
The EC Act 2001 specifies 15 designated consumers which are energy intensive.
Designated Consumers are required to:
Appoint certified energy managers undergo energy audits by external BEE certified energy auditors report energy consumption data, and comply with prescribed energy consumption norms.
Aluminum Fertilizers Iron &
Steel
Cement Pulp &
Paper
Chlor Alkali Textiles Sugar
Railways Port Trust Transport Petrochem
Sector
Power Gen
Dist / Trans
Commercial
Buildings
Chemicals
Why Energy Audit?
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The Energy Guzzlers• Refrigeration Compressors
– Reciprocating, Screw, Centrifugal• Fans
– AHU
– Ventilation / Fresh Air
– Exhaust
– Cooling Tower Fans
– Car Park ventilation
• Pumps
– Primary Chilled Water
– Condenser Water
– Secondary Chilled Water
– Pressure booster pumps
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ELECTRICAL UTILITIES
HVAC (Heating / Ventilation / Air Conditioning)
• Consider installing a building automation system (BAS/ BMS ) or energy management system (EMS) or restoring an out-of-service one. • Tune up the HVAC control system. • Balance the system to minimize flows and reduce blower/fan/pump power requirements. • Eliminate or reduce reheat whenever possible. • Use appropriate HVAC thermostat setback.
Energy Saving in AHUEnergy saving in Cooling Towers
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VSD Control SOLAR LIGHT PIPES
Dome on
RooftopSolar Pipe Light
in offices
Conference
Room
SOLAR LIGHT PIPES
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37TOTAL ENERGY SOLD IN TN STATE IS 59.045 Billion Units 38
INDUSTRIES
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AUDIT = DIAGNOSIS
EMS = TOOL
YOU = ENABLER
BENEFICIARY = YOU + LIFE ON EARTH
THANK YOU
T PAUL KOSHY
LARSEN & TOUBRO LIMITED
Ph: +919886339775
Address: 38,Cubbon Road, Bangalore - 1
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