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Energieffektivisering ved tunnelindfrysning

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Energieffektivisering ved tunnelindfrysning

ELFORSK projekt no. 348-036

Johannes Kristofersson jkri@teknologisk.dk

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▪ Introduktion

▪ Resultater

▪ Ny karton tunnelindfryser

▪ Konklusions

Dagsorden

(3)

1 Introduktion

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Projektdeltagere

(5)

Hvad er en karton tunnelindfryser?

(6)

Energibesparelser

30% besparelse i energi

Udvikle ny type af karton tunnelindfryser

Hvordan?

1 – Luftflow i tunnellen

2 – Luftfordeling i tunnellen

3 – Mellemlag

Hvad var målene med projektet?

(7)

▪ Testtunnel

▪ Industriel tunnel

▪ Mellemlag

▪ Beregningsværktøjer

Hvordan gjorde vi det?

(8)

2 Resultater

(9)

▪ Test matrice

Testresultater

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2 Resultater – Testtunnel

(11)

Luftflow

86% improvements in energy

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▪ Baffler

Luftfordeling i tunnelen

94% improvements in energy

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Mellemlag

78% improvements in energy

Total energy 18 kWh

(14)

2 Resultater – Industriel tunnel

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Claus Sørensen - test

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Luftflow

(17)

3 Ny karton tunnelindfryser

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Nyt design fra Hørup Maskiner

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4 Konklusioner

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▪ Stærkt reduceret energiforbrug fra 86% til 94%.

▪ Med meget simple tiltag.

▪ Nøglen er at sænke lufthastighed og udnytte cyklustiden.

▪ Claus Sørensen er ved at implementere resultaterne af projektet.

▪ Hørup Maskiner har udviklet ny karton tunnelfryser, som bygger på resultaterne af projektet.

▪ Energioptimering er vej til bedre bundlinje.

Konklusioner

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▪ Tak for opmærksomheden!

https://www.teknologisk.dk/soki/40080 Rapporten kan hentes fra:

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(23)

Test indfryser

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Industrial indfryser ved CS

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Mellemlag

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Målinger i test tunnellen

(27)

Faserne i indfrysning

Down cooling Freezing Under cooling

(28)

▪ Frysetiderne

Hvad styrer indfrysningen?

𝜏𝑑𝑜𝑤𝑛 𝑐𝑜𝑜𝑙𝑖𝑛𝑔 = 𝜌 ∙ 𝑐𝑝 ∙ 𝑏 ∙ 𝑙 𝑛 𝑡𝑠𝑡𝑎𝑟𝑡 − 𝑡𝑎

𝑡𝑓𝑟𝑒𝑒𝑧𝑖𝑛𝑔 − 𝑡𝑎 1

+ ෍ 𝛿

𝑘 𝑃𝑎𝑐𝑘𝑖𝑛𝑔

+ 𝑏

2 ∙ 𝑘𝑢𝑛𝑓𝑟𝑜𝑧𝑒𝑛 𝑝𝑟𝑜𝑑𝑢𝑐𝑡

𝜏𝑓𝑟𝑒𝑒𝑧𝑖𝑛𝑔 = ∆𝐻𝑣𝑜𝑙 𝑡𝑓𝑟𝑒𝑒𝑧𝑖𝑛𝑔 − 𝑡𝑎

1

+ ෍ 𝛿

𝑘 𝑃𝑎𝑐𝑘𝑖𝑛𝑔

+ 𝑏

2 ∙ 𝑘𝑓𝑟𝑜𝑧𝑒𝑛 𝑝𝑟𝑜𝑑𝑢𝑐𝑡

∙ 𝑏

𝜏𝑢𝑛𝑑𝑒𝑟𝑐𝑜𝑜𝑙𝑖𝑛𝑔 = 𝜌 ∙ 𝑐𝑝∙ 𝑏 ∙ 𝑙 𝑛 𝑡𝑠𝑡𝑎𝑟𝑡 − 𝑡𝑎

𝑡𝑓𝑖𝑛𝑎𝑙 − 𝑡𝑎 1

+ ෍ 𝛿

𝑘 𝑃𝑎𝑐𝑘𝑖𝑛𝑔

+ 𝑏

2 ∙ 𝑘𝑓𝑟𝑜𝑧𝑒𝑛 𝑝𝑟𝑜𝑑𝑢𝑐𝑡

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Industrial indfryser ved CS

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Målinger inde i kasserne

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Eksempel af målinger

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CFD – reference kørsel

Lavt snit

Højt snit

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CFD – Baffler – Industrial tunnel

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▪ Reference kørsel

CFD – Reference kørsel

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CFD – Paller flyttet

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CFD – Baffler

Baffler Referencen

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CFD – Baffler

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▪ Temperatur og hastighedsforløb

CFD – Baffler – Industrial tunnel

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Varierende luft flow

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Varierende luft flow

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▪ Paller tættere på blæser T9 og to paller i luftretning T10

Luft fordeling

T9 – Paller tættere på blæser

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▪ Baffler

Luft fordeling i tunnelen

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▪ Baffler plus at flytte pallestak

Luft fordeling

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▪ Besparelse i forhold til træ mellemlag

Neptun mellemlag

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Luft flow frem og tilbage

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Luft flow frem og tilbage

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9 paller i stedet for 10

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▪ Neptun gamle og nye version

Neptun mellemlag

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Ny indfryser fra Hørup Maskiner

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▪ Air flow:

86% energy savings in the test tunnel on 36 hours freezing time

62% energy savings in the industrial tunnel on 33 hours freezing time

79% energy savings in the test tunnel on 31 hours freezing time with new air spacers

Largest energy savings at first and then gradually less

11-18% energy savings by reversing the air flow in the test tunnel and 1.4 - 1.9 hours (5-7%) reduced freezing time

10% energy savings by reversing the air flow in the industrial tunnel and 1,6 hours (6%) reduction in freezing time

Conclusions

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▪ Air distribution in the tunnel:

93% energy savings in the test tunnel by using baffles

Important to reduce the air flow and utilize the freezers cycle time to save energy

▪ Air spacers:

4.9 hours reduction in freezing time by using new air spacers

▪ Claus Sørensen are implementing findings of the project

▪ Hørup Maskiner has developed a new carton freezing tunnel based on the project

▪ There are hugs energy savings available with very simple measures

Conclusions

Referencer

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