6-azbil_energy saving activities with bems

2014 Azbil Corporation and its affiliates. All rights reserved.

Energy Saving Activities

with BEMS

Building Energy Management System

- Aim to be ECO Friendly Building -

Azbil Corporation

Toshinobu Nakayama

2 2014 Azbil Corporation and its affiliates. All rights reserved.

1. Introduction

2. Significance of Energy Conservation

3. Keys of Energy Conservation

4. What BEMS?

5. Advantage of BEMS

6. Job Reference in Thailand

7. Conclusion

Contents


Introduction

BEMS are leading Energy Conservation Activities for Building Sector in Japan.

BEMSBuilding Energy Management System A system that collect various building facility's information

from the integrated facilities by using Information Technology

and manage and control building facility efficiently.

A Tool to visualize energy consumption of building and to

support smarter facility operations.

In Japan, continuous energy conservation activities with BEMS by the owners contribute not only to accrue their own benefit but also to solve environmental issue of the community.


Corporate Social Responsibility

Operation Cost

Obligation of Environment Preservation

Energy Cost

Misc.

Maintenance Cost

Construction Cost


Energy conservation makes a contribution to MANAGEMENT and ENVIRONMENT.


0

2000

4000

6000

8000

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

10

1998

80%

Actual situation of building facility

operation for air conditioning in a building

Partial load in this range are appeared

in 80% of total running time

Ru

nn

ing

Tim

e Frequent Distribution

Reference : Dissertation 1998 of The Society of Heating, Air-conditioning and Sanitary Engineers of Japan

Operation Load Ratio against the Designed Spec(%) (For 10 years)


DEFINITE possibility of Energy conservation for Building Facility



AWARENESS and UNDERSTANDING of Risks for Energy Conservation 1. Changing outside conditions: Outside temperature /

Humidity, Insolation, Weather, Wind power, Wind direction..

2. Load variations: Operation time, Number of People,

Temperature Setting, Volume of outdoor air intake ,

Production volume

3. Efficiency of Facility: Aged deterioration, Inadequate

maintenance.

4. Change of building use: Changes to layout, Introduction of

new equipment and devices, Addition/Renovation of building



CONSIDERATION of counter measures against Risks for Energy Conservation 1. Improvements in building structure: Outer walls and roof,

Upgrading of window heat insulation, Sunlight control

2. Improvement efficiency of facility: Upgrading to high-

efficiency models, Shift to efficient energy sources

3. Introduction of BEMS: Sophisticated control (variable water flow, variable air flow), Optimized operation,

Visualization and analysis of energy situation.

4. Continual energy-conservation efforts: Continual PDCA

(Plan, Do, Check, Action) activities


Partici pation

Visuali zation

Opera tion

Invest ment

By Everyone related to the building

Sharing the goal

Current condition Progress Issues

Resolution of waste Review Adjusting to actual load

Renovation of old equipment

Installation of highly efficient equipment


4 KEY FACTORS for Energy Conservation


Photo Sensor Motion Sensor TH Sensor Solar Sensor

VSD

Local Panels

A/C Units

Chiller Control

VWV Control

For Pumps

Measurement

Chillers

PM

GM

Power Meter

Gas Meter

Control

RoomBEMS

VAV Control

for A/C Units

Measured by

Sensors

Lighting Control

Function Description

Operation &

Monitoring

Operation & Monitoring, Schedule

Control etc. for Building Facilities

Energy

Saving

Control

Control for Building Facilities,

Energy Saving Programs &

Optimum Control Management etc.

Measuring Data Collection & Storage for Energy & Environmental

Measuring Points

Energy Data

Management

Data visualization by various

Graphs and Report Format to

analyze Energy Data

Major Feature

Example of BEMS / Reference: NEDO (in Japanese)

BEMS Building Energy Management System is the system that controls and manages the

building facilities, energy & environment by using

Information Technology. Promotion of introduction

BEMS, which is based on Japanese technologies,

would bring to improve energy efficiency of the

buildings sector.

System Image

Lighting Air Conditioning Chiller

4. Whats BEMS?


Realization of 4 KEY FACTORS BEMS can support to manage 4 KEY FACTORS for Energy

Conservation effectively.

Review Operation Energy Data Management

Introduce Energy Saving Application

Energy Saving Control

Understand Current Condition, Operation & Monitoring

Progress and Issues Energy Data Management

Take Appropriate Measure

Measurement

Improve Operational Efficiency

Energy Saving Control >

Share Goal and Achievement by All

Members Measurement Energy Data Management

Participation

Visualization

Operation

Investment

4. Whats BEMS?


Confirm the Result and Progress

Improve Operations

Optimize the Performance

Review and Add Measures

Set Goals Plan Measures

4. Whats BEMS?

For Successful Energy Conservation by BEMS PDCA activities with BEMS would be important to increase and

continue Energy Saving Amount


Successful Case of Energy Conservation by BEMS

4. Whats BEMS?


4.2% : Planned Amount by BEMS Implementation 12.4 : Increased Amount by BEMS Operation

NEDO conducted subsidy program to promote BEMS in Japan. Continuous and Secure Energy Saving was executed by BEMS. Energy Efficiency was increased by operation improvement with BEMS.

Before BEMS After BEMS

(Plan)

After BEMS

(Result) Reference:

NEDO 2009

Analysis of Implementation Status of BEMS during 2005 to 2008

Pri

ma

ry E

ne

rgy C

on

su

mp

tio

n (

TJ/Y

)

4. Whats BEMS?

Key Driver of Japanese Energy Conservation


BEMS is comprised of the

servers that manages huge

data collected from field devices,

the controllers that controls the

facilities with energy saving

programs, the field devices

such as sensors and actuators.

Energy

Data

Server Client PC

Management

Integration

Server

System

Core

Server

MODBUS

Converter

Power

Meter

Power

Meter

Power

Meter

MODBUS *2

LAN (BACnet TCP/IP)

PARA-

CONDUCTOR *1

Controller

Actuators

Sensors

Chiller

Controller

Chillers

Pumps

Controller

Cooling Towers

Pro

prie

tary

Bu

s

Mea

su

rem

en

t E

nerg

y S

avin

g

Building Energy Management System

(BEMS)

*1 PARACONDUCTOR is a trademark of Azbil Corporation. *2 Modbus is the name of communication protocol that has been developed by Schneider Electric in France and is one of the de facto standard protocol.

4. Whats BEMS? M

on

itorin

g


Electricity City water Gas

Floor details

Measure Measure Measure

Measure Measure

Measure

Measure

Measure

Measure Measure

Measure

Hot water

supply/Vapor Sanitation Other

Floor

Measure

Lighting

/ Outlets

Measure

A/C

Units

Heat Source details

Heat Source

Heat Source

Distribution Pumps

Measure Measure Measure

Ventilation

Fans A/C Fans Lightings Outlets

System A

System B

Heat source

Elevators, etc.

Chilled water

Hot water

Pumps

Measure

Measure Measure

Measure

Measure

Measure Measure

Measure

Measure

Measure Measure

Measure

Measure Measure

Measure

Overall / By Energy Source

By Energy Use

M

easu

rem

en

t pla

n a

cco

rdin

g to

pu

rpo

se

By Energy System

Specific device/floor

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

[

]

0

20

40

60

80

100

120

140

160

[

%]

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

180,000

4 5 6 7 8 9 10 11 12 1 2 3

[

]

DHC DHC

0

50

100

150

200

250

1 2 3

Reference from SHASE FY2003 Building Management System Committee report

Heat

source

Other

Conveyance Hot water

supply /

Vapor

Lighting /

Outlets

Power

The optimization of energy consumption is supported by measuring and analyzing the energy consumption of the whole building by season, day of the week and hour.

The issues in each use are visualized through the analysis of energy consumption by services. For example, if the energy usage for lighting system is high percentage against total energy use, the review of energy-saving in lighting system is prioritized. Further energy-saving plans and implementations according to usage conditions are supported

Energy consumption is measured and analyzed by system.

Discovery of anomalies and the selection of where to apply energy-saving measures are supported.

Validity can be evaluated through the comparison of multiple systems.

Measurements are executed for specific devices and floors.

Analyses of Performance degradation and estimation of overhaul timing are supported through the efficiency management.

Detailed operation verification is made possible by focused measurements executed to specific floors. This supports the optimization of facility operations and parameter settings.

4. Whats BEMS?


4. Whats BEMS?

For analyzing energy use, various graphs are available.


Actually Occur Operational Fault and

Change Situation Decrease in Efficiency by

Shortage of Maintenance

Measure A

BEMS

Measure A

Measure

B

Measure C

Measure

D

Measure

E

Energy Saving should continue!

Serious Issue

Maximum Merit

Measure

B

Measure

C


Successful Case of Energy Conservation by BEMS


Case study for fault detection by BEMS analyzing

Detect the large steam usage

Current Situation and Issues

Detect the problem by emerging angle

Steam consumption even

though the steam valve

position is 0%

Detect steam leak inside

AHU console

Current status and issues

Repair and Confirmation

See the reduction

of steam leak



Case study of fault detection by BEMS analyzing We found huge usage compare with base line consumption that

is estimated by the building load profile from January to April.

Fault Detection : Steam Leakage Detection

We found huge steam usage compare with base line consumption that is estimated by the

building load profile from January to April.

Detect the large steam usage

Energy trend of Energy Consumption

Prim

ary

En

erg

y [M

J]

Steam

Electricity

Base line



0

100

200

300

400

500

600

0 100 200 300 400 500 600

Ste

am

Usag

e [

kg

/h]

Steam usage exists

at 0% valve opening

Correlation analysis between

calculated flow rate(valve opening) and actual flow rate

( Steam valve designed flow rate [kg/h] Valve opening [%] )

Steam leakage

or

heat loss from piping


Cause was confirmed that steam usage was happened even at 0% valve position.

It must be caused by steam leakage or heat loss.

Case study of fault detection by BEMS analyzing Cause was confirmed that steam usage was happened even at

0% valve position.



Case study of fault detection by BEMS analyzing After site survey with owner, several steam leakages from steam

piping system were found and repaired to reduce steam loss.


Detect steam leak in the

steam piping system



Leakage at steam trap bypass valve was founded through on-site investigation.

Much amount of energy and cost saving was achieved by the repair.

Ste

am

Us

ag

e [

kg

/h]


Case study of fault detection by BEMS analyzing After repairing the piping system, steam consumption was

reduced around 40% from before

Day

Steam Consumption

Ou

tdo

or

Tem

pera

ture

[

] Reduction of

steam usage

by repair work



Shopping Center Building Type

Floor Size

Location

48,600 m2

Bangkok,

Thailand

Amarin Plaza

Energy Saving

Applications

BEMS

CHP VWV Control

CDP VWV Control

CT Fan VSD Control

Dec. 2013 Completed



Chiller Plant Tower

Chiller Plant Depart

Primary Pump VWV Control

Condensing Pump VWV Control

Energy Data Server Client PC Management

Integration

Server

System

Core

Server

LAN (BACnet TCP/IP)

Infilex-GC

Sensors

Inverter

Transmitters

Energy Saving Application



25.0



EPC- BL Y2013 Y2014

CWP kWh used 57,773 57,773 26,671

CDP kWh used 52,619 52,619 21,960

Total kWh used 110,392 110,392 48,631

0

30,000

60,000

90,000

120,000

150,000

Pew

er C

on

sum

pti

on

[k

Wh

]

Energy Saving by BEMS

61,761 kWh

Energy Saving Amount

61,761 [kWh] as of Y2014 March



AHU

FCU

Primary Pump VWV Control Condensing Pump VWV Control

More than

60% saved

Before

After

VWV: Variable Water Volume

Pump Power Consumption Pump Power Consumption


Energy saving equipment and control programs

are necessary to operate HVAC system efficiently.

In addition, optimization of operation, management

and controls of whole building is important.

We would like to propose

continuous operation improvements

by data analysis and visualization

using BEMS.

7. Conclusion

6-azbil_energy saving activities with bems

Documents

energy consumption of

analysis of energy situation

efficient energy sources

control building facility

additionrenovation of

building sector

building structure

building use