HEAT Exchangers

Presenter:

Zoltn EgyhaziMsc.M.E, Head of DH

Dep.

***Danfoss Kft.

1139 Budapest, Vci u. 91Dtum: 2008.09.07

***

- Danfoss International Background- Danfoss Three Main Divisions- Product range of Heating Division- Principle of Heat Exchanger- Manufacturing Technology of Heat Exchangers- Task of Heat Exchanger- Sizing, Dimensioning- Application example

Content of the presentation: (Danfoss Heat Exchangers)

A MULTINATIONAL COMPANY

Location of the center: DenmarkFamily owned company

Main data:- annual turnover 3 milliard EUR- more than 25.000 employee worldwide- manufacturing capacity 250.000 pc/day- more than 30 year experience

Europe North Latin Afrika zsia Pacific Sum.America America

Manufacturing comp. 43 11 2 1 5 62Sales companies 71 6 6 1 15 2 101

We are one of these 71 pc. of companies

Product range (three main divisions)

Danfoss Motion Technology (Frequency converters)

Danfoss Heating Technology

Danfoss Cooling Technology & Air Conditioning

Heating Technology (product portfolio, overview)

-Self acting control valves-Motor actuated valves-Electronic controllers-Ball valves

- Brazed Heat Exchangers- Gasketted heat exchangers - Heating Substations

Plate Heat Exchangers (principle, design, therminology)

Primary flow

Primary return

Secondary flow

Secondaryreturn

Plates Water flows opposite direction

Water flows opposite direction

Heat Insulation

Mounting bracket

Front plate

End plate

Manufacturing Technology (Brazed)

Stainless steel plates, covered by brass.Manufacturing of the plateswith special tool.

They put the plates onto each other according to required capacity. Heat Exchangers have been

put into an oven.Brass melts here.Brazed connection is redy.

Assembly Technology (Gasketed)

Plates are pressed together with screws

Plate sandwich

Task of the Heat Exchanger

When is it required to use Heat Exchanger?

Primary Side Secondary side

When we have to separate two sides, only heat transfer is allowed.

Material or Content 1Nominal Pressure 1

Material or Content 2Nominal Pressure 2

HEAT EXCHANGER (indirect system) If it is not necessary,

you can use direct system. See an

example:

Heat TransferHeat Transfer

Plate Heat Exchangers (two different type, advantages, disadvantages)

Brazed Heat Exchangers:

Light weight

There is no leakage

It can be cleaned only with acid(flushing)

Gasketed Heat Exchangers:

Heavy weight

Leakage can occure

It can be disassembled and cleaned manually

Sizing (how to use the sizing software)

Danfoss Heat Exchanger Calculation Tool: Danfoss Manuals:

Application example:

Ksznm a Megtisztel Figyelmet! (Egyhzi Zoltn okl. gm. terletvezet)

within our core businesses

Our core business is district heating and HVAC/Central

Heating

a global leader

We will establish a global position as number one

growth is our pursuit

... as a highly respected company

We want recognition as the best price to performance

supplier and customer partner

by mastering advanced technologies

We will supply innovative products with fast delivery and

high service by use of advanced technologies

in customer applications

We will extend our core competencies related to

application knowledge and product design

which improves quality oflife

Our products contribute to improving human comfort and encourage to environmental consciousness via

energy savings

while creating value to all stakeholders

It is our aim to increase the value for all stakeholders by applying Business Excellence