life cycle asessment of low mid and high rise multi family dwellings
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Transcript of life cycle asessment of low mid and high rise multi family dwellings
Hybrid Life Cycle Assessment of Low, Mid and High-Rise Multi-Family Dwellings
Original article written by : Kimberly Bawden &Eric WilliamsPresented by : Fazle Rabbi Rahik Roll :1301018Supervised by : Dr.Kazi ABM Mohiuddin
Life Cycle Assessment
» Life-cycle assessment (LCA) is a technique to assess environmental impacts associated with all the stages of a product's life
OBJECTIVES Classification of the process
which should be included in the boundary of LCA analysis.
Examination of the total LCE and GWP of a portfolio of 10 low ,mid and high rise multi family dwellings
Examination of the change of the gap in energy use between single and multi family homes by house hold income.
objectives LCA inventory
Process sum
EIO
hybridExploration of effect of
income
Functional unit choice
Methods
1
2
3
Inconsistent choice
consistent choice
Materials contribution
EIO LCA
CED
GWP
ResultAna
lysi
s by
mat
eria
l co
ntrib
utio
nE
cono
mic
allo
catio
n ap
proa
chClassification of the process
Examination of the total
LCE & GWP
Examination of the change
in gap in energy Concept
mapping
Functional Unit Choice
Inconsistent choice Consistent choice
Hybrid approach The method is based on the fundamental equation: ETotal = Ematerials + Econstruction + Eoperation where, Ematerials = (ΣPj·ESCj)/total area of residence Econstruction = (BV·ΣPj·EFj)/total area of residence Eoperation = primary energy of fuels consumed/ total area of residencea
Cumulative Energy Demand
»
WS/W: Wood siding/wood frame;
SCB/WJ: Stucco on concrete block/wood joists;
PCP/RC: Precast concrete panels/reinforced concrete:
PCP/S: Precast concrete panels/steel;
RPC/RC: Ribbed precast concrete
RPC/S: Ribbed precast concrete/steel.
Global Warming Potential (GWP)
WS/W: Wood siding/wood frame;
SCB/WJ: Stucco on concrete block/wood joists;
PCP/RC: Precast concrete panels/reinforced concrete:
PCP/S: Precast concrete panels/steel;
RPC/RC: Ribbed precast concrete
RPC/S: Ribbed precast concrete/steel.
Total life cycle energy for 11-storey multy family dwellings
Total life cycle CED by Income and Housing Type
SF: Single-Family Residence;
k: Thousand US$;
GJ: Gigajoules;
Ave: Average; m2: Square meters.
Conclusion
CED/GWP increase from low to mid to high-rise. A functional unit only including HVAC activities
the total life cycle energy, or CED, is approximately halved for the 11-story multi-family dwelling,
Total life cycle energy of single-family detached homes increases with income more quickly than for multi-family homes.
THANKS!Any questions?