Analys av klimatpåverkan från ventilationssystem vad avser utformning och systemval i kontorsbyggnad
(2024) In TVIT-5000 ABKL05 20231Division of Building Services
- Abstract (Swedish)
- Bakgrund:
Byggsektorn står för en väsentlig del av Sveriges växthusgasutsläpp, motsvarande 21% enligt Boverket. För att nå Sveriges klimatmål med minst 85% minskning av nettoutsläppen till 2045 krävs hållbara byggnader och installationsdesign, särskilt inom ventilation och komfortkyla. Livscykelanalys (LCA) är en metod som stödjer bedömningen av produkters miljöpåverkan och leder byggbranschen mot mer hållbara materialval och minskade utsläpp. Den nya lagen om klimatdeklaration för byggnader från januari 2022 fokuserar på bärande konstruktionsdelar, klimatskärm och innerväggar, medan installationer planeras inkluderas år 2025.
Syfte:
Syftet med detta examensarbete är att genomföra en klimatanalys av ventilationssystemet i... (More) - Bakgrund:
Byggsektorn står för en väsentlig del av Sveriges växthusgasutsläpp, motsvarande 21% enligt Boverket. För att nå Sveriges klimatmål med minst 85% minskning av nettoutsläppen till 2045 krävs hållbara byggnader och installationsdesign, särskilt inom ventilation och komfortkyla. Livscykelanalys (LCA) är en metod som stödjer bedömningen av produkters miljöpåverkan och leder byggbranschen mot mer hållbara materialval och minskade utsläpp. Den nya lagen om klimatdeklaration för byggnader från januari 2022 fokuserar på bärande konstruktionsdelar, klimatskärm och innerväggar, medan installationer planeras inkluderas år 2025.
Syfte:
Syftet med detta examensarbete är att genomföra en klimatanalys av ventilationssystemet i kontorsbyggnaden Priorn för att minska koldioxidutsläppen och identifiera de mest kritiska materialen för att kunna undersöka och föreslå förbättringar för mer klimatsmarta installationssystem.
Frågeställning:
Vilka installationsmaterial och typ av ventilation och komfortkylning som orsakar störst klimatpåverkan och hur dessa kan minskas.
Vilken klimatpåverkan har orsakats av ventilationssystemet av VAV-typ i kontorsbyggnaden Priorn, d.v.s. ett ventilationssystem som både ventilerar och kyler.
Om klimatpåverkan minskar om VAV-ventilationssystem byts ut mot vattenburen komfortkyla.
Slutligen ska klimatpåverkan från ventilationssystemet i kontorsbyggnaden Abborren, som ventileras med konventionellt system kompletterat med vattenburen komfortkyla, jämföras med klimatpåverkan från ventilationssystemet i Priorn.
Metod:
För att uppnå syftet kommer en klimatanalys att utföras genom klimatberäkningar av alla material i ventilationssystemet i Priorn. Resultaten kommer att jämföras med en tidigare undersökt byggnad för att identifiera skillnader och orsaker till dessa. Materialoptimering kommer att genomföras för att minska koldioxidutsläppen, och eventuella problem och utmaningar kommer att identifieras och åtgärdas.
Resultat:
Den mest effektiva åtgärden för att minska klimatpåverkan var att byta ut traditionella plåtkanaler mot isoleringskanaler, alltså kanaler uppbyggda av isoleringsskivor. Dessutom visade sig plåtkanaler i återvunnet material sänka klimatpåverkan, per kvadratmeter byggnad, med 33,4%. Vad gäller systemval visade sig ett VAV-system ha lägre klimatpåverkan än ett vattenburet system med kylbafflar. Slutligen, vid jämförelse med basfallet Abborren, hade Priorn en lägre klimatpåverkan per BTA än Abborren, vilket kan bero på skillnader i ventilationssystem och materialval. (Less) - Abstract
- Background:
The building industry is responsible for a big part of Sweden's greenhouse gas emissions, around 21% according to Boverket. To meet Sweden's climate goals, which aim for at least an 85% reduction in emissions by 2045, we need environmentally friendly construction methods, especially in ventilation and cooling. Life Cycle Analysis (LCA) is a way to assess how products impact the environment, helping the construction industry choosing greener materials and cut emissions. A new law on climate declarations for buildings, starting January 2022, looks at key building parts like supports, walls, and roofs, with plans to include installation systems by 2025.
Purpose:
The purpose of this thesis is to conduct a climate analysis of... (More) - Background:
The building industry is responsible for a big part of Sweden's greenhouse gas emissions, around 21% according to Boverket. To meet Sweden's climate goals, which aim for at least an 85% reduction in emissions by 2045, we need environmentally friendly construction methods, especially in ventilation and cooling. Life Cycle Analysis (LCA) is a way to assess how products impact the environment, helping the construction industry choosing greener materials and cut emissions. A new law on climate declarations for buildings, starting January 2022, looks at key building parts like supports, walls, and roofs, with plans to include installation systems by 2025.
Purpose:
The purpose of this thesis is to conduct a climate analysis of the ventilation system in the office building Priorn in order to reduce carbon emissions and identify the most critical materials, enabling the investigation and proposal of improvements for more sustainable installation systems.
Problem definition:
Identification of the environmental impact caused by different installation materials and types of ventilation and comfort cooling.
The climate impact of the ventilation system in the Priorn office building, utilizing VAV technology, a system combining ventilation and cooling, will be examined.
The investigation will explore whether the environmental impact decreases when replacing the VAV ventilation system with water- based comfort cooling, with chilled beams.
Finally, a comparative analysis will be conducted to assess the climate impact of the ventilation system in the Abborren office building, which employs a conventional system supplemented with water-based comfort cooling, with chilled beams, in relation to the Priorn system.
Method:
To achieve the purpose, a climate analysis will be conducted through climate calculations of all materials in the ventilation system at Priorn. The results will be compared with a previously studied building to identify differences and their causes. Material optimization will be carried out to reduce carbon dioxide emissions, and any problems and challenges will be identified and addressed.
Conclusion:
By using insulation channels instead of traditional metal ducts, the climate impact was reduced. The switch from a VAV system to a water-based cooling system, with chilled beams, significantly increased the climate impact due to the larger size of the baffles and the use of non-recycled materials. The switch to sheet metal ducts made from recycled material decreased the climate impact more than expected, as recycled materials have significantly lower carbon footprints than non-recycled materials. When compared to the baseline scenario, Priorn had a lower climate impact per square meter than Abborren, which could be attributed to differences in ventilation systems and material choices. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9149026
- author
- Kajtaz, Ada LU and Abuayyash, Sarah
- supervisor
- organization
- course
- ABKL05 20231
- year
- 2024
- type
- M2 - Bachelor Degree
- subject
- keywords
- Climate analysis, ventilation system, carbon emissions, sustainability, environmental impact, material optimization.
- publication/series
- TVIT-5000
- report number
- TVIT-5101
- other publication id
- ISRN LUTVDG/TVIT—24/5101--SE(92)
- language
- Swedish
- additional info
- Examinator: Åsa Wahlström, Adjunct Professor, division of Building Services
- id
- 9149026
- date added to LUP
- 2024-02-26 12:26:45
- date last changed
- 2024-02-26 12:26:45
@misc{9149026,
abstract = {{Background:
The building industry is responsible for a big part of Sweden's greenhouse gas emissions, around 21% according to Boverket. To meet Sweden's climate goals, which aim for at least an 85% reduction in emissions by 2045, we need environmentally friendly construction methods, especially in ventilation and cooling. Life Cycle Analysis (LCA) is a way to assess how products impact the environment, helping the construction industry choosing greener materials and cut emissions. A new law on climate declarations for buildings, starting January 2022, looks at key building parts like supports, walls, and roofs, with plans to include installation systems by 2025.
Purpose:
The purpose of this thesis is to conduct a climate analysis of the ventilation system in the office building Priorn in order to reduce carbon emissions and identify the most critical materials, enabling the investigation and proposal of improvements for more sustainable installation systems.
Problem definition:
Identification of the environmental impact caused by different installation materials and types of ventilation and comfort cooling.
The climate impact of the ventilation system in the Priorn office building, utilizing VAV technology, a system combining ventilation and cooling, will be examined.
The investigation will explore whether the environmental impact decreases when replacing the VAV ventilation system with water- based comfort cooling, with chilled beams.
Finally, a comparative analysis will be conducted to assess the climate impact of the ventilation system in the Abborren office building, which employs a conventional system supplemented with water-based comfort cooling, with chilled beams, in relation to the Priorn system.
Method:
To achieve the purpose, a climate analysis will be conducted through climate calculations of all materials in the ventilation system at Priorn. The results will be compared with a previously studied building to identify differences and their causes. Material optimization will be carried out to reduce carbon dioxide emissions, and any problems and challenges will be identified and addressed.
Conclusion:
By using insulation channels instead of traditional metal ducts, the climate impact was reduced. The switch from a VAV system to a water-based cooling system, with chilled beams, significantly increased the climate impact due to the larger size of the baffles and the use of non-recycled materials. The switch to sheet metal ducts made from recycled material decreased the climate impact more than expected, as recycled materials have significantly lower carbon footprints than non-recycled materials. When compared to the baseline scenario, Priorn had a lower climate impact per square meter than Abborren, which could be attributed to differences in ventilation systems and material choices.}},
author = {{Kajtaz, Ada and Abuayyash, Sarah}},
language = {{swe}},
note = {{Student Paper}},
series = {{TVIT-5000}},
title = {{Analys av klimatpåverkan från ventilationssystem vad avser utformning och systemval i kontorsbyggnad}},
year = {{2024}},
}