Building Energy Management Systems: system design and data requirements

4-oct.-16

Andreas Androutsopoulos aandr@cres.gr

BDE 2sd Workshop for Energy, Brussels 4/10/2016

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Objectives of a BEMS

to provide a healthy and pleasant indoor climate

to ensure the safety of the user and the owner

to ensure economical running of the building in respect of both energy and personnel

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www.big-data-europe.eu [Source: IDC, TXT 2015]

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Building Energy Management Systems

Building Energy Management Systems (BEMS) is an integrated system of software, hardware and services that controls energy use through information and communication technology.

It monitors, automates, and controls building systems such as heating, ventilation, air conditioning, thermostats, and lighting to increase building energy efficiency and improve comfort in a very wide application area.

A BEMS can monitor, control, and use alarm operations regarding energy issues, indoor conditions, power needs on a real time basis data coming from many various sources.

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Building Energy Management Systems

Application

Office Buildings Industries Residential buildings Commercial buildings Hospitals Hotels …..

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Building Energy Management Systems

The market of BEMS is growing day by day so the need to gather, control, and interpret all collected data.

EMS revenue is expected to grow to $10.8 billion by 2024.

www.big-data-europe.eu[Source: Navigant Research, 2015]

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BEMS offered services

[Source: Navigant Research, 2015]

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Achieve Energy savings of 15-20% for heating, cooling, ventilation while energy savings for lighting can be as high as 50-60%.

Reduce energy costs and therefore lower operating costs.

Automatic load cut and peak load management incurred decreased energy costs.

Improve the quality of the indoor environment.

Greater building functionality and economy.

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The use of a BEMS can

BigDataEurope 2nd Workshop in Energy 4/10/2016Building Energy Management Systems: system design and data requirements p.8

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Main network communications protocolsused for buildings installations include KNX, EHS, BatiBUS the European Installation Bus (EIB), Bacnet

Physical communication media Twisted pair wiring, Powerline networking, Radio (KNX-RF), Infrared, Ethernet and 3G/4G communications

Building Energy Management Systems

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Data gathered from

Energy meters,

Temperature sensors (air, surface, water)

Relative humidity sensors,

Air velocity sensors,

Air-water flow sensors,

Light sensors,

Movements sensors,

Pollution measurement sensors,

actuators, etc.

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Main components of a BEMS. [Source: MOD 2001] Typical functions of a BEMS. [Source: MOD 2001]

A BEMS configuration

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Design considerations

According to the needs Ease of use Complexity Level of automation Ability to upgrade / expand

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BEMS equipment in an office building

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BEMS application

Bioclimatic office building in Athens

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BEMS visualization

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Data

410 signals are recorded

• Sensors

• Actuators

• Controllers

• Dimmers

Data saved every 10 – 15 min.

Files of appr. 1 Mb/d

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Temperature distribution

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Electrical energy consumption

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Sensors

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In conclusion

A BEMS can lead to

Increased energy efficiency

Improved environmental conditions

Reduction of overall costs through improved energy efficient use of E/M systems and more efficient use of staff

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Data management and real time monitoring are 2 key elements for the efficient use of a BEMS.

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THANK YOU FOR YOUR ATTENTION

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