BrochureCLIMESPACE-GB 260711

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The district cooling network:environment-friendly energy efficiencyfor the city

Far more than a comfort feature, air-conditioning in buildings has become an urban development issue. In addition to climate change

and urban growth, changes in architecture and regulations are leading to new climate management methods and energy efficiency

requirements in buildings.

District cooling is an essentiel energy for the sustainable city.

The district cooling network is a collective solution, which intelligently meets the air-conditioning needs of dense urban environments

because of its strengths in terms of efficiency. Energy efficiency: the energy consumed to produce chilled water is significantly lower.

Environmental efficiency: the local natural resources available are used. Shared and virtuous efficiency: by comparison with an

equivalent pool of stand-alone air-conditioning units, all the drawbacks (environmental, health, aesthetics) are minimized.

Discover the district cooling network and combine efficiency with urban ecology.

AN ENVIRONMENT-FRIENDLY AIR-CONDITIONING SOLUTION IN THE HEART OF THE CITY

1Meeting cooling needs in a dense urban environment

CLIMESPACE IS A GDF SUEZ CENTRE OF EXPERTISEFOR DISTRICT COOLING NETWORKS

A pioneer and international leader in district cooling networks, CLIMESPACE (a subsidiary of Cofely-GDF SUEZ Energy

Services) is operating and developing a network in Paris that is one of the largest in the world and the largest in Europe:

7 production sites and 3 energy storage sites, delivering almost 400 GWh per annum of cooling to over 500 buildings,

via a network of 70 kilometres.

CLIMESPACE is certified ISO 14001 (Environment) and OHSAS 18001 (Health and Safety).As a centre of expertise within the GDF SUEZ Group, CLIMESPACE brings its know-how to district cooling system projects

all over the world.

ENERGY & ENVIRONMENTAL

EFFICIENCY

50%improvement in energy efficiencywith the Paris district cooling networkcompared to an equivalent poolof stand-alone units.


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The district cooling network:anaturally efficient solution

Energy savings, use of l ocal natural resources, flexibility and security: the district cooling network offers

many advantages compared to stand-alone air-conditioning systems. This collective system is a factor for

energy efficiency in itself. Adapting to the local conditions and needs, it provides cooling while protecting

the environment and lifestyle quality.

5Better production and distribution of air-conditioning

ICE STORAGE

STAND-ALONE AIR-CONDITIONING UNITS

STAND-ALONE AIR-CONDITIONING UNIT

AUTOMATED ENERGYTRANSFER STATION

It intelligently transfers cooling from

the primary network to the secondary

network of each building connected.

It is far more compact than a stand-

alone air-conditioning unit and frees

up valuable space.

CONTROL ROOM

The control room ensures 24/7

monitoring of production plants and

energy transfer stations and remote

control of all district cooling network

facilities to optimize their operation

in real time.

CHILLED WATER STORAGE

ENERGY STORAGE

In the form of ice or chilled water, it provides

a better way to respond to demand.

Firstly, it reduces the use of chilled water

production machines during consumption

peaks or daily or seasonal highs.

Secondly, it assures the continuity

of the cooling supply even when production

plants are down.

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COP* OF DIFFERENT COOLING SYSTEMS

CLIMESPACENetwork in Paris

Stand-alone unitCooling tower

Stand-alone unitDry cooler

*COP: Coefficient of Performance. This is the ratio between the effective energy (coolingdelivered) and the energy consumed (the energy required to produce cooling). The higherthe COP, the more efficient the production method and the greater the energy saving.

Source: survey by cole des Mines (National School of Engineering), 2003.

DISTRIBUTION NETWORK

It is entirely underground and carries chilled

water from the production plants or storage

tanks to the energy transfer stations. It has

two pipes: one to supply chilled water,

the other to return heated water.

PRODUCTION PLANT

It houses the electric-powered production facilities

that produce cold in the form of chilled water

(between 1 and 5C) with the best possible energy

efficiency. The heat released by the production

equipment can be evacuated via dry or wet cooling

towers, or when the local situation permits,

via systems using surface aquatic resources

(3 CLIMESPACE sites in Paris use water from

the Seine in this way).

RIVER, LAKE, SEA

A nearby aquatic resource offers a dual advantage. Firstly,

the production plants achieve top performance throughout

the year, using the natural coolness of this local resource

to cool machines. Secondly, FREE COOLING can be

implemented in cold seasons. This involves directly using

naturally cold water in the distribution network. CLIMESPACE

is an expert in this technology, which results in considerable

reductions in energy consumption and CO2emissions.


EFFICIENCY

80%less chemical products usedin the Paris district cooling networkcompared to an equivalent poolof stand-alone units.


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District cooling: a solution managedfrom project to delivery

As a global operator, CLIMESPACE can be your single point of contact to develop and operate a cooling

network solution, from choosing the layout through to final delivery of the cooling. The priority is the same

at every stage, namely to achieve the best efficiency. There are many variables to improve performance,

such as the energies used, equipment chosen, management tools and advice to users on how to use

the delivered cooling.

GUIDE

TO DEVISE AND PROPOSE

A COOLING NETWORK SOLUTION

ADAPTED TO THE LOCAL

CONTEXT,

by taking specific constraints

into account and working closely

with local public and private

stakeholders.

STUDY

AFTER DETAILED ANALYSIS

OF THE RESOURCES AND NEEDS,

to fully design the right system

for chilled water production,

energy storage, distribution

and delivery with the best energy

and environmental performance.

BUILD

TO SELECT THE MOST EFFICIENT

MATERIALS AND COORDINATE ALL

THE DIFFERENT TRADES,

to create a custom-built complex

system.

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FACILITIES EQUIPPED WITH THE LATEST TECHNOLOGY

OPERATE

TO GUARANTEE THE COOLING

SUPPLY WHILE OPTIMIZING

PRODUCTION

in relation to the demand,

to supervise and run the entire

system 24/7 and to guarantee

the long-term performance

of the facilities through first class

maintenance.


EFFICIENCY

90%less refrigerant emissionsby the Paris district cooling networkcompared to an equivalent poolof stand-alone units.

DELIVER & ADVISE

TO DELIVER COOLING UNDER

THE BEST CONDITIONS

by monitoring the parameters

of the energy transfer station

in real time, and advising

the customer on the best use

of the cooling delivered.

9Offering the best energy eff iciency from design to delivery

THE CONTROL STATIONOF THE CLIMESPACE NETWORKIN PARIS:KEY FIGURES

7production plants and3energy storage sites managedby remote control

450sub-stations monitored in real time

82,200points tracked by supervision

1specialized management team

24/7 monitoring


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1978

ETS CONTROL

Data-gathering system

introduced

From the beginning,

CLIMESPACE has designed

solutions that track

the functioning of energy

transfer stations (ETS)

in real time.

1992

FRIGOLO

A software package is

developed for thermal-

hydraulic network

simulation

Calculating water speeds,

pressures and flows,

Frigolo can be used

to simulate a networks

behaviour and optimize

chilled water production.

1998

STORAGE TANK

The first storage tank

of Tour Maubourg is built

The chilled water storage

tanks are cooling reserves

that can be used to

instantly deliver more

power to the network,

if need be, and to stagger

production-site demands

for electric power

over time.

2002

HYDRIC DISCHARGEMANAGEMENT

Analysis of the quality

of hydric discharge

Studying the efficiency

and environmental impact

of chemical products

enables trade-offs by

opting for less toxic

products, limited use

and replacement by

physical treatments.

2002

HEALTH RISKMANAGEMENT

Fight against

Legionella

After 3 years of research,

an effective strategy to

fight Legionella

was introduced with

relevant tracking

indicators.

The results were 92% less

bacteria and 80% less

chemical products used.

30 years of innovation dedicated toenergy & environmental efficiency

District cooling with CLIMESPACE:a innovative solution

CLIMESPACEs mission for over 30 years has been to constantly devise new, more efficient and

environment-friendly solutions through technological advances and new processes.

EQUIPMENT OPTIMIZED BY MANY YEARS OF INNOVATION

11Innovating with ever more eff icient solutions

2005

PERFORMANCEANALYSIS

Comparative study of

the performance of the

district cooling network

and stand-alone units

By comparing the

efficiency ratios of

stand-alone units with

those of a network,

CLIMESPACE identified

key energy efficiency

factors.

2007

FREE COOLING

The first system of FREE

COOLING with water from

the Seine was set up on

the Palais de Tokyo site

First FREE COOLING

winter: by using water from

the Seine at under 5,

the electricity consumption

used to produce chilled

water was divided by four

over several weeks.

2008

GLOBAL CONTROLSYSTEM

The control room of

the Les Halles production

plant started up

Production facilities

and energy transfer

stations were monitored

and remote controlled

24/7, guaranteeing

the supply of cooling

and performance.

2010

ECOSYSTEM

Study of the Seine

ecosystem

Analysis of the ecosystem

and hydrobiological

measurements: knowledge

of the environment helped

CLIMESPACE limit

the influence of its sites

and identify relevant

indicators to monitor.

2011

OASIS EFFECT

Study of the impact

of air-conditioning

on the temperature

of the air

In collaboration with Meteo

France and the Cnam

(French public scientific

professional institution),

CLIMESPACE is studying

the impact of the various

cooling solutions on the air

temperature in Paris,

during a heat wave.


EFFICIENCY

35%less electricity consumedby the Paris district cooling networkcompared to an equivalent poolof stand-alone units.

DRYSYSTEMS ONLY(SIMULATION)

CURRENT WET ANDDRYSYSTEMS

Nighttemperature(C)

Paris has different cooling systems, such as the CLIMESPACE network (collective wetsystem), stand-alone dry and wet facilities. In the event of a heat wave, if all the wet systems(including CLIMESPACE) were replaced by dry systems the urban heat island would increaseby 1 or 2C.

TEMPERATURE OF THE AIR IN PARISAND COOLING SYSTEMS


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The strengths of the district coolingnetwork for customers and local authorities

Only a network system can give overall management of cooling solutions that combine the advantages

needed to meet the requirements of the citys various stakeholders: decision-makers, building

administrators, users, local residents, etc. By connecting to the network, the customer can avoid all

the problems involved in producing air-conditioning in a dense urban environment.

BY CHOOSING CLIMESPACE, YOU BENEFIT FROMTHE STRENGTHS OF THE DISTRICT COOLING NETWORK

In Paris, by comparison with an equivalent pool of stand-alone units, the network offers:

50%improvement in energy efficiency

35%less electricity consumption

50%less CO2emissions

90%less refrigerant emissions

65%less water consumption

80%less use of chemical products

A SOLUTION ADAPTED TO ALL TYPES OF BUILDINGS

Source: CLIMESPACE internal studies and scientific publications.

13Benefiting from the multiple advantages of the cooling network

FOR LOCAL AUTHORITIES AND CUSTOMERS AND USERS

Efficiency optimized in terms of energy

Distributionof local, renewable energies

Reduction of CO2emissions and polluting waste

Better controlof public health issues

Improved management of urban resources

Limiting the urban heat island phenomenon

Preserving the architectural heritage

Partner operator: single global contact

Simplicity of use, limited maintenance

Deliveryguarantee

Adaptation to the real needs of buildings

Valuablespace freed up (roof, basement)

Decrease in environmental impact

Elimination of health risks

Limited use of chemical products

Sound comfort: no noise

Visual comfort: aesthetics preserved

Reliabilityfor office buildingsThe thermal comfort supplied improves working conditions. The network is reliable and guarantees

data protection, for example, by regulating the temperature in computer rooms.

Preservationof public and cultural buildingsThe conditions for receiving the public are improved. Works of art are kept at ideal temperatures

in museums. The architecture is preserved in listed buildings.

Elimination of health risksfor buildings visited by the general publicThis risk of proliferation of air-conditioning-related Legionella is effectively managed on a daily

basis to protect the health of the buildings occupants.

Delivery guaranteefor shopsThroughout the year, the network can deliver the high power required to maintain temperatures

very quickly, particularly at peak shopping periods (Christmas, sales).

Comfortfor hotels and restaurantsSilent and invisible in the heart of prestigious locations, yet guaranteeing non-stop service,

the network meets the expectations of a demanding clientele. The space saved can be used

for other purposes.

Advantages of the network:efficiency, security, environmental and aesthetics


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Design/Production/Artwork:

Photo credits: CLIMESPACE / Fotolia / Getty Images /

GraphicObsession / Htel Bristol / Laurent Mauger

185 rue de Bercy

75012 PARIS

FRANCE

Tl. : + 33 (0)1 44 74 89 40

Fax : + 33 (0)1 44 73 92 93

www.climespace.fr/eng

This document is printed on 100% recycled post consumption

Cocoon Silk (250 g/m) paper, certified FSC. The printer STIPA is

certified ImprimVert for its respect of environment-friendly criteria.

BrochureCLIMESPACE-GB 260711

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