District Heating the GF Way 0304

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District Heating the Grundfos Way

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For us, district heating

means knowledge transformed intostrong partnerships!



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Pump Technology second to none

With an annual production of 10 million high-

quality pumps, Grundfos is a world-leader within

this area, one of vital importance to district heating.

Responsible, for example, for circulating hot water in

offices, hospitals, hotels and homes.

Dedicated to Knowledge and Innovation

Since its foundation in 1945, Grundfos has been

dedicated to reliability and high quality throughthe relentless pursuit of knowledge and innovation.

For example, we invested about 50 million EUR in

research in 2001. This was the same year, for instance,

in which we established the Grundfos Prize to

stimulate and promote research.

Although we are changing every day to meet the needs

of the world around us, we never lose sight of our com-

mitment to knowledge and insight.

Scandinavian district heating

Grundfos is part of the development which made

Scandinavian district heating the most efficient and

reliable heating system in the world. The experi-

ence gained in this area is what makes it possible

for us to create high-quality solutions within pump

technology.

Flow Thinking and Partnership

Flow Thinking is our keyword to district heating andmeans taking a holistic approach. An approach which

obliges us to create pump solutions that have been

designed with regard to the entire system as well as

all the different processes involved in district heating.

This makes the professional dialogue so important and

indicates that partnership is the most fruitful working

relationship.

Flow Thinking means taking a holistic andinnovative approach working in partnership withour customers to optimize the entire system.

Niels Due Jensen

Group President

The Grundfos Magna circulator

is one of the latest resultsof our ongoing innovation.

Grundfos headquarters inBjerringbro, Denmark.

Since its foundation in 1945 Grundfos haspursued knowledge and innovation.

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means overall view transformedinto an intelligent selection!



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Vital parts of a unified whole

The pumps are vital to the efficiency of a district heat-

ing system. Wherever in the system they are located

like the human heart.

However, the quality of the pump can only be assessed

in its proper context. Pumps are nothing in themselves.

The value of the pump is derived from its interaction

with the rest of the system.

The process of selectionThe interconnectedness of a district heating system

makes the selection of each individual pump extreme-

ly important. Both as concerns efficiency, energy sav-

ings and reliability.

At Grundfos, we have merged our pump expertise

and our knowledge of district heating systems. From

this we have developed procedures and programs to

provide easy and safe answers concerning selection,

either through personal consultancy or support from

our electronic tool, WinCaps.

Embracing the different sub-areas

The different areas in a district heating system each

have their specific needs in relation to pump solutions,

all depending on the temperature and pressure fluc-

tuations to which the pumps are exposed.

The Grundfos product range and experience embraces

it all. From power plants and sub-stations in the dis-

tribution network to sub-stations and mixing loops in

end-user installations.

Uniting the responsibility of supplyingWorking in partnership with Grundfos therefore

means reducing the number of pump suppliers to one.

One supplier who assumes responsibility for ensuring

that the different components are selected and com-

bined in the best possible way. Both in terms of reli-

ability and from the perspective of value for money.

5

200

H [M]

100

50

30

20

10

20 30 40 50 100 200 300 400 500 1000 2500 4000

Q [m3/h]

Enduction NB/NK (E)

Inline dryrunner TP (E)

Inline dryrunner TP (E)

Wet-runner UPS

Split-Case HS

Combined Heatand Power Plant

Pump types: TP/NK/HSCHead upto: 250 mFlow upto: 4000 m3/h

Substations/Boiler houses

Pump types: TP(E)/NK/NB(E)Head upto: 250 mFlow upto: 4000 m3/h

Mixing loops / Substationsin buildings

Pump types: UPS/UPE/TP(E)Head upto: 30 mFlow upto: 100 m3/h

Mixing loops & Substation in buildingsCombined Heatand Power Plant

Substations

Typical

District

Heating

System Boiler houses



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means pump technologytransformed into reliability!



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UPSSeries200

UPESeries2000

TPESeries2000

In-Line

In-LineE-pumps

Endsuction

Endsuction

E-pumps

CR/CRE

Hydro2000

System

Main pumps

Boiler shunts

Temperature shunt

Flow filter

Lull heating

Exhaust gas exchanger

Mixing loops

Domestichot water recirculation

Pressure holding

Speed-controlled

Constant-speed Product

The first decision

Grundfos pump technology includes thousands of dif-

ferent components each related to one of two differ-

ent types of pumps.

The constant-speed pump. Or the speed-controlled

pump. The first decision to make is which of the two is

the right choice in each specific situation.

The two types of pumps

and value-for-money philosophyIn making the right choice, we need to consider both

reliability and value for money.

The speed-controlled pumps optimise district heating

systems where flow changes over time. The variable

flow produced by these pumps will adapt to the sys-

tem. Thus energy savings will often be substantial, and

the pay-back time very short.

Where the flow is always the same, the constant-

speed pump will often be the most economical solu-

tion. Making this fundamental decision brings us back

to system knowledge and the overall view.

First-class materials and superior precision

Every Grundfos pump is produced from high-qual-

ity raw materials such as stainless steel or cast iron.

The choice of material ensures corrosion resistance as

well as an extremely high degree of precision in pump

design. Together with an advanced manufacturing

process the choice of material has led to a significant

revolution in the efficiency of circulator pumps.

Reliability demonstratedReliability is a hallmark of the Grundfos pump tech-

nology. Millions of pump solutions around the world

tell the same story of pumps functioning perfectly 24

hours a day. Year after year after year.

In-Line E-pumpIn-Line pump

The first decision to makeis whether the speed-controlled pump or theconstant-speed pump isthe best value for moneysolution.

Grundfos has delivered pumpsfor district heating sub-stationsthroughout Bulgaria.

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means calculationtransformed into savings in energy!



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The important sum to do

Deciding which pump technology to install simply

involves making a calculation.

This calculation might be very complex. Yet the results

are quite easy for us to interpret due to our system

knowledge and experience.

The costs of the initial technology, installation, main-

tenance and energy consumption are all important

aspects of this calculation. As is the pumps long ser-

vice life and the investment in manpower.Once the calculation has been made, we can provide

an answer to the value-for-money question.

Example: Speed-controlled pumps

The electronics of the speed-controlled pumps ensure

optimum adaptation to the flow in a district heating

system. This translates into energy savings of a differ-

ent scale depending on the specific conditions of the

locations in which the pumps are installed.

As the speed-controlled pumps have built-in motor,

frequency converter and application software, the

need for investments in these components is elimi-

nated. Besides, the installation costs and risks of errorare reduced as these components are dedicated to

each other and already integrated.

Increasing energy savings isthe result of Grundfos workto reduce our impact on theenvironment.

Grundfos pumps are part ofthe district heating solution atthe Palac Flora business centrein Prague, the Czech Republic.

The electronics of the speed-controlled pumps trans-lates into savings in energy over time.

Initial costs

Energy costs

Other costs

Constant speed

Selected pump: 2 x NK 80-250/259Total life cycle costs: 113,852

Speed-controlled

Selected pump: 3 x TPE 80-240Total life cycle costs: 63,432

92% 83%

5% 12% 5%

Depending on the energy price, there is a very shortpay-back time on the extra cost for the speed-controlled

pump system. Given a cost of 0.1 EURO per kWh, the pay-back time is approximately 1.7 year. Based on calculationprinciples from Hydraulic Institute and Europump.

3%

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means listening transformedinto ongoing support!



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Experiences in motion

Listening to our partners and taking account of their

different and changing experience is part of the never-

ending process of increasing the support to all those

with whom we cooperate.

Training and the Mobile Knowledge Bank

During installation and subsequently we train our

partners to optimise the benefits that can be derived

from the chosen pump technology. The trainers areall in close contact with experts from the Business

Development Center in Denmark.

The support tool, WinCaps

Our person-to-person consultancy has been sup-

plemented with tools to make life easier for all our

partners involved with district heating. WinCaps is an

efficient electronic tool in connection with, for exam-

ple, pump selection and dimensioning. It includes

calculation programs for lifecycle costs and pay-back

times.

System Guide to District Heating

This hard-copy guide provides an overview of district

heating systems as well as giving technical informa-

tion about the different solutions possible and the

respective products required.

Supporting our partners also means developing toolsfor sizing and new ideas for district heating.

Grundfos circulators areinstalled in, e.g., the Latviancapital Riga.Client: Riga Siltums.

The Great Hall, Beijing, hasGrundfos circulators in its base-ment.

Grundfos circulators are work-ing in Budapest, Hungary.Client: Budapest District HeatingCo.

Seoul City is one of a number oflarge cities relying on Grundfos

circulators.Client: Korean District Heating

The district heating solution atthe Bolshoi Theatre in Moskowis based on Grundfos pumps.

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www.grundfos.com

BE

Being responsible is our foundation. We know that we

have a responsibility towards the people who are Grundfos,

towards the innovative soul of Grundfos, as well as towards

the surrounding world. Whatever we do, we make sure that

we have a firm and sustainable basis for doing it.

THINK

Thinking ahead makes innovation possible. We encourage

a certain Grundfos way of thinking that is founded on the

belief that everyone must contribute by using his or her

judgement and foresight. We are looking for commitment

and ideas in everything we do in order to make the best

solutions. We think and then we act.

INNOVATE

Innovation is the essence. It is the innovations that make

Grundfos unique. We stand out because of our ability

to constantly create new solutions to the ever-changingdemands of the pump business. We meet every challenge,

and we are never afraid of taking the initiative remaining

true to our ideals is the basis for our ongoing renewal.

Innovation is the soul of Grundfos.

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01911201(GB)

District Heating the GF Way 0304

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