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AWADUKT THERMO ANTIMICROBIALInstallation of Ground-Air Heat Exchanger (GAHE) in commercial buildings

Case study TESCO supermarket in Zdzieszowice/ Poland

OVERVIEW

1. BUILDING CONCEPT

2. INSTALLATION OF GAHE

3. ANALYSIS OF MEASURED RESULTS

4. AWADUKT THERMO

CASE STUDY: AWADUKT THERMO IN COMMERCIAL BUILDINGS

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4. AWADUKT THERMO ANTIMICROBAL

BUILDING CONCEPTINITIAL SITUATION

TESCO One of the leading supermarket chains in Poland

173 markets, 20 petrol stations, 3 logistic centers

Commercial area in total approx. 427.300 m2

Approx. 23.000 employees

Total sales of Tesco Group in Poland approx. 1,4 Mrd in 2005

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Target: Reduction of the Energy Costs about 20 30 %

The energy demand of the new build TESCO market in Zdzieszowice (finished in March 2007) was to be reduced by approx. 20-30% through an optimized energy management. Sun, wind and ground-source energy were to be used as natural energy sources.

TESCOs target is to reduce the energy demand of a square meter about 50 % until 2010.

BUILDING CONCEPT

First Pilot Project in Zdzieszowice

The new supermarket is the first one in which alternative energy sources were used to reduce the energy costs.

The pilot project had a big importance within the Tesco group and was supported

NEW ENERGY CONCEPT

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the Tesco group and was supported intensively. In the meantime further markets with the same concept have been realized.

BUILDING CONCEPT

Photovoltaic modules and wind generators produce electricity that is saved in batteries.

NEW ENERGY CONCEPT

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The air for the air conditioning is pre-heated in winter and pre-cooled in summer with an AWADUKT THERMO Ground-Air Heat Exchanger from REHAU that was installed below the building.

BUILDING CONCEPT

1.Photovoltaics

- 18 photovoltaic panels (ca. 5% of roof area)- Production of approx. 5,000 kWh/year

2. Wind generator

- 4 Wind Generators

ELECTRICITY GENERATED BY PHOTOVOLTAICS AND WIND GENERATORS

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- 4 Wind Generators- Production of approx. 15,000 kWh/year

Total: ca. 20,000 kWh/year

The electric energy demand of the building amounts ca. 72, 000 kWh/Year.

>> approx. 30% of the electric energy demand is generated by renewable energy sources.

BUILDING CONCEPT : GROUND-AIR HEAT EXCHANGER

Scheme of the GAHE AWADUKT THERMO system

INSTALLATION OF THE PIPE SYSTEM BELOW THE MARKET

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AWADUKT THERMO DN 200

20 Pipes 35m

In total 700 m DN 200

Header Pipe AWADUKT

THERMO DN 500 with

welded connectors DN 200

BUILDING CONCEPT : GROUND-AIR HEAT EXCHANGER

Winter Operation Data: Calculated Data:

Ambient Temperature - 15 C Energy Saving by GAHE 20.500 kWh

Ground Temperature + 8 C Outlet Temperature of GAHE + 2 C

Heat Demand 46.320 kWh

DESING DATA FOR WINTER OPERATION

Inlet Temperature at the

Outlet Temperature

at the end of the

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Inlet Temperature at the

suction element : -15C GAHE: +2C

Ground Temperature:

+8 C

Ground-Air Heat Exchanger

AWADUKT THERMO

BUILDING CONCEPT : GROUND-AIR HEAT EXCHANGER

Summer Operation: Calculated Data:

Ambient temperature + 30 C Energy Saving by GAHE 10.700 kWh

Ground temperature + 8 C Outlet Temperature of GAHE + 16 C

DESIGN DATA FOR SUMMER OPERATION

Outlet Temperature

at the end of the Inlet Temperature at the

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GAHE: +16CInlet Temperature at the

suction element : +30C

Ground Temperature:

+8 C

Ground-Air Heat Exchanger

AWADUKT THERMO

OVERVIEW

1. BUILDING CONCEPT

2. INSTALLATION OF GAHE

3. ANALYSIS OF MEASURED RESULTS

4. AWADUKT THERMO

CASE STUDY: AWADUKT THERMO IN COMMERCIAL BUILDINGS

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4. AWADUKT THERMO ANTIMICROBAL

GROUND-AIR HEAT EXCHANGER AWADUKT THERMO

- Volume flow 2,700 m/h- AWADUKT THERMO DN 200 700 meter- Header pipe DN 500 70 meter- Number of register pipes 20 Rows

Calculated energy saving:(heating and cooling) 31,200 kWh

DATA OF GAHE SYSTEM

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(heating and cooling) 31,200 kWh

GROUND-AIR HEAT EXCHANGER AWADUKT THERMOPHOTOS FROM BUILDING SITE SEPTEMBER 2006

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GROUND-AIR HEAT EXCHANGER AWADUKT THERMOPHOTOS FROM BUILDING SITE SEPTEMBER 2006

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GROUND-AIR HEAT EXCHANGER AWADUKT THERMOPHOTOS FROM BUILDING SITE SEPTEMBER 2006

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GROUND-AIR HEAT EXCHANGER AWADUKT THERMOPHOTOS FROM BUILDING SITE SEPTEMBER 2006

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TESCO-SUPERMARKET

Present guests amongst others: - Management of the TESCO-Group International (England)- Project Leader TESCO - Poland- Ambassador of England- Department of the Environment- Specialized Press- Television of Poland- Involved Planning Offices

OFFICIAL OPENING ON 06.03.2007

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- Involved Planning Offices

OVERVIEW

1. BUILDING CONCEPT

2. INSTALLATION OF GAHE

3. ANALYSIS OF MEASURED RESULTS

4. AWADUKT THERMO

CASE STUDY: AWADUKT THERMO IN COMMERCIAL BUILDINGS

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4. AWADUKT THERMO ANTIMICROBAL

ANALYSIS OF MEASURED RESULTS

Research concerning operation performance:

In cooperation with the University of Poznan the operation performance of the GAHE was measured and

analyzed over a period of one year.

The following parameters were analyzed:

- Ambient temperature

- Outlet temperature of the GAHE

RESEARCH IN COOPERATION WITH THE UNIVERSITY OF POZNAN

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- Outlet temperature of the GAHE

- Air humidity

- Flow Speed of the air in the GAHE.

Start of Project: April 2007

End of Project: April 2008

The final report was created by the University of Poznan.

ANALYSIS OF MEASURED RESULTSWINTER OPERATION

T

15

10

5

0

Temperature [C]Temperature Profile on 27.12.2007 (Coldest Day)

Inlet Temperature [C]

Out let Temperature [C]

Ambient Temperature [C]

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Daily activation of the GAHE at 7.00 am

Even on the coldest day the GAHE outlet temperatures is approx.: 12c

=> Due to the installation of the GAHE under the building, whose temperature is approx. 20C.

Start of GAHE operation

-5

-10

0

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:

5

9

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ANALYSIS OF MEASURED RESULTS

Q in KW Night deactivation

Max. Q

18

16

14

12

10

8

6

Q [KW] Heating Performance in December 2007

WINTER OPERATION

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4

2

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0

1

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1

2

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2

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7

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7

Maximum heating performance: 15 KW

Under standard conditions (Outdoor temp.: -16C) a maximum performance of 20 KW

would have been achieved

The zero points in the graph represent the deactivation of the GAHE at night

In December the highest number of operating hours (503hrs) was achieved

ANALYSIS OF MEASURED RESULTS

Humidity [%]

SUMMER OPERATION

Humidity at 100 %40

35

30

25

20

15

120

100

80

60

Temperature and Humidity Profile on 27.7.2007Temperature [C]

5

10

15Inlet Temperature [C]

Outlet Temperature [C]

Ambient Temperature

Inlet Humidity [%]

Outlet Humidity [%]

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Even at the hottest day the GAHE outlet temperature does not exceed 18C

Profile of the relative air humidity shows a longer period 100% Condensation!

Start of GAHE operation

15

10

5

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40

20

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ANALYSIS OF MEASURED RESULTS

Night deactivation

10

5

0

-5

-10

Q [KW]Cooling Performance in July 2007

Q in KW

SUMMER OPERATION

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Max. Q

-10

-15

-20

0

1

.

0

7

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7

Maximum cooling output of 15 KW

Due to the cool outside conditions (Ambient Temperature Outlet Temperature GAHE) the bypass was

activated frequently and therefore in July only 223 operating hours were achieved.

ANALYSIS OF MEASURED RESULTS

T

TRANSITION PERIOD

18

16

14

12

10

8

120

100

80

60

Temperature [C] Humidity [%]

Temperature and Humidity Profile on 17.4.2008

Temperat ure [ C ]Inlet Temperature [C]

Outlet Temperature [C]

Ambient Temperature [C]

Inlet Humidity [%]

Outlet Humidity [%]

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The GAHE was deactivated from 14.00 17.00 because the ambient temperature was higher

than the GAHE outlet temperature

The log shows the need to optimize the control technique: obviously the bypass is wongly activated

by the GAHE inlet temperature and not by the ambient temperature

Start of GAHE operating Deactivation of the GAHE

6

4

2

0

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0

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9

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9

40

20

0

ANALYSIS OF MEASURED RESULTS

Due to the ambient temperature the GAHE

was deactivated

Heating

Q in KW12

10

8

6

4

2

Q [KW] Profil of Q in April 2008

TRANSITION PERIOD

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Night deactivation of the

GAHE Cooling

0

-2

-4

-6

0

1

.

0

4

.

2

0

0

8

0

2

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8

In transition periods, both heating and cooling is required

Due to the frequent bypass operation, 298 operating hours had been achieved in April

ANALYSIS OF MEASURED RESULTSSUMMARY OF THE RESULTS

Annual Energy Savings from the GAHE:

Heating:

Investigated energy savings: 26,000 KWh

Calculated energy savings before installation: 20,500 KWh

Cooling:

Investigated energy savings: 9,000 KWh

Calculated energy savings before installation: 10,700 KWh

Potential downsizing of the HVAC equipment:

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Potential downsizing of the HVAC equipment:

Heating: The GAHE allows a reduction of the heating unit from 48 KW to 28 KW

Cooling: The GAHE allows a reduction of the cooling unit from 38 KW to 23 KW

Operational performance:

Annual operation hours of the air conditioning: 5,100 h

Bypass Activation: 1,600 h

Annual GAHE operation:

3,500 h

(equivalent to 68,6% of the operating hours of the air conditioning).

OVERVIEW

1. BUILDING CONCEPT

2. INSTALLATION OF GAHE

3. ANALYSIS OF MEASURED RESULTS

4. AWADUKT THERMO

CASE STUDY: AWADUKT THERMO IN COMMERCIAL BUILDINGS

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4. AWADUKT THERMO ANTIMICROBAL

- Antimicrobial Inner Layer

>> Hygienic and germ-free fresh air supply

- High heat conductivity through optimized PP

>> Improved heat transfer between

ground and sucked air

- High resistance and rigidity through PP

AWADUKT THERMO ANTIMICROBIALCONVINCING ARGUMENTS

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- High resistance and rigidity through PP

>> Protection against external attacks

>> No condensate accumulation

- Radon proof System

>> No permeation of radon into the system

- Extensive pipe range and sizes

>> Tailored installation

AWADUKT THERMO PIPE SYSTEMANTIMICROBIAL INNER LAYER

With PP-Standard-

Material

Transported air is considered a food item according to VDI 6022/1.

The unique and patented antimicrobial Polymer pipe from

AWADUKT Thermo prevents microbe growth. The antimicrobial

effect is due to the integration of silver particles into the pipe

material.

An experiment by the Institut Fresenius (Jan 2003) confirmed the

significant reduction in microbe growth:

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- Pseudomonas aeruginosa

- Staphylococcus aureus rod bacteria

- Bacillus subtilis - bacteria

- Aspergillus niger - mould

- Candida albicans yeast bacteria

- Escherichia coli faecal germs

Material

With AWADUKT Thermo

antimicrobial

significant reduction in microbe growth:

Keimzahl

AWADUKT THERMO ANTIMIKROBIELLSPECIAL ANTIMICROBIAL INNER LAYER

www.rehau.de Bau

Industrie

Automotive

Source:

Results Institute Fresenius Jan 2003

www.rehau.de Bau

Industrie

Automotive

AWADUKT THERMO ANTIMICROBIALInstallation of Ground-Air Heat Exchanger (GAEA) in commercial buildings

Case study TESCO supermarket in Zdzieszowice/ Poland