3/18/2010

1

Session V: Automation & Control And Thermography

Topic: ENERGY MANAGEMENT SYSTEM

&

AUDIT OF ELECTRICAL SYSTEM

T PAUL KOSHYEAOC – LARSEN & TOUBRO LIMITED

EnCon in Electrical Systems

1 2

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

3

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.

4

3/18/2010

2

BASIC EMS CAPABILITIESSchedulingSet-pointsAlarmsSafetiesBasic Monitoring and Trending

5 6

•Using Spreadsheets for Graphing and

•Analyzing Trend Data

•Converting to Spreadsheet Format

•Opening Data Files

•Setting Up Graphs

ADVANCED FEATURES IN AN EMS

7

•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

8

3/18/2010

3

9

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.

11

Energy ProfileANALYZE ENERGY MANAGEMENT DATA !!

0.00

10.00

20.00

30.00

40.00

50.00

60.00

00

:15

01

:00

01

:45

02

:30

03

:15

04

:00

04

:45

05

:30

06

:15

07

:00

07

:45

08

:30

09

:15

10

:00

10

:45

11

:30

12

:15

13

:00

13

:45

14

:30

15

:15

16

:00

16

:45

17

:30

18

:15

19

:00

19

:45

20

:30

21

:15

22

:00

22

:45

23

:30

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

3/18/2010

4

13

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

14

PREREQUISITES FOR OPTIMIZING EMS OPERATIONS

EMS DocumentationSequences of OperationCurrent Control StrategiesCalibration of EquipmentFunctional Testing

15

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

3/18/2010

5

17

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

18

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

19

Non-Energy Control Applications

Maintenance ControlRemote EMS Operation (Internet Based)

Security ApplicationsIndustrial ApplicationsRetail Applications [ spot billing)Miscellaneous Applications

• CMMS – Computerised Maintenance Management System

20

• 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

3/18/2010

6

21

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

22

23

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.

3/18/2010

7

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?

3/18/2010

8

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

30

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

3/18/2010

9

VSD Control SOLAR LIGHT PIPES

Dome on

RooftopSolar Pipe Light

in offices

Conference

Room

SOLAR LIGHT PIPES

36

3/18/2010

10

37TOTAL ENERGY SOLD IN TN STATE IS 59.045 Billion Units 38

INDUSTRIES

39

AUDIT = DIAGNOSIS

EMS = TOOL

YOU = ENABLER

BENEFICIARY = YOU + LIFE ON EARTH

THANK YOU

T PAUL KOSHY

LARSEN & TOUBRO LIMITED

Koshytp@LNTEBG.COM

Ph: +919886339775

Address: 38,Cubbon Road, Bangalore - 1

40