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Exergoenvironmental Analysis of Medium-Size Turboprop Engine (m-TPE)-Based Life Cycle Analysis (LCA) and Exergy

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Life Cycle Assessment in Aviation

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Abstract

The exergoenvironmental analysis of a medium-size turboprop engine (m-TPE) is researched based on Life Cycle Assessment (LCA) and exergy analysis for maximum take-off power. The m-TPE has the 29.235 mPts/h component-related environmental impact rate, while the gas turbine section between the components has the maximum component-related environmental impact rate with 9.144 mPts/h. The environmental impact rate of jet fuel is determined as 125,280 mPts/h, while the m-TPE consumes 522 kg/h jet fuel in maximum operation mode. Maximum specific environmental impact value is estimated as 12296.41 mPts/GJ in air compressor outlet, while the minimum specific environmental impact is found to be 5224.91 mPts/GJ for the fuel inlet stream of combustion chamber. Additionally, air compressor and combustion chamber units have highest waste exergy environmental impact rates with 9546.94 mPts/h and 56,302 mPts/h, respectively. The waste exergy rates dominate the environmental impacts for m-TPE and its all components excepting gas turbine and power turbine units.

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Abbreviations

AC:

air compressor

AFR:

air–fuel ratio

b:

specific environmental impact, (mPts/GJ)

\( \dot{B} \):

exergoenvironmental impact rate (mPts/h)

CC:

combustion chamber

cP:

specific heat capacity (kJ/kg.K)

CI:

cost impact

DOC:

direct operation costing

\( \dot{E} \):

energy rate (GJ/h)

ED:

exhaust duct nozzle

EI:

environmental impact in EI-99 (mPts/kg)

EI-99:

eco-indicator 99

EIO:

environmental impact of operations

ET:

engine thrust (N)

\( \dot{E}x \):

exergy rate (GJ/h)

f:

exergoenvironmental factor (%)

GHG:

greenhouse gaseous

GT:

gas turbine

GTMS:

GT mechanical shaft

ICAO:

International Civil Aviation Organization

IATA:

International Air Transportation Association

LCA:

Life Cycle Assessment

LCC:

life cycle costing

LCI:

life cycle impact/inventory

LCIA:

life cycle impact analysis

LHV:

lower heating value of fuel (kJ/kg)

\( \dot{m} \):

mass flow rate (kg/s, kg/h)

M:

weight (kg)

MRO:

maintenance, repair, and overhaul

MS:

mechanical shaft

m-TPE:

Medium-Size turboprop engine

n:

lifespan of system (year)

P:

pressure (kPa)

pLCA:

process life cycle assessment

PT:

power turbine

PTMS:

PT mechanical shaft

R:

universal gas constant (kJ/kg K)

r:

relative exergoenvironmental impact difference (%)

T:

temperature (K)

t:

annual operation hours (h)

V:

velocity (m/s)

\( \dot{W} \):

work rate (GJ/h)

WExR:

waste exergy ratio (%)

Y:

environmental impact points related to material (mPts)

\( \dot{Y} \):

environmental impact rate related to material (mPts/h)

τ:

lifetime of materials (h)

a:

air

AC:

air compressor

CC:

combustion chamber

D:

destruction

ED:

exhaust duct nozzle

F:

inlet streams as a Fuel

g:

combustion gasses

GT:

gas turbine

GTMS:

GT mechanical shaft

k:

k’th component, k’th stream

L:

losses

m-TPE:

Medium-Size turboprop engine

P:

pressure

Pr:

outlet stream as Product

PT:

power turbine

PTMS:

PT mechanical shaft

T:

temperature

tot:

total

WEx:

waste exergy

0:

dead state

CO:

construction

DI:

disposal

F:

inlet streams as a Fuel

OM:

operating and maintenance

Pr:

outlet stream as Product

tot:

total

WEx:

waste exergy

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Balli, O. (2024). Exergoenvironmental Analysis of Medium-Size Turboprop Engine (m-TPE)-Based Life Cycle Analysis (LCA) and Exergy. In: Karakoc, T.H., Ekici, S., Dalkiran, A. (eds) Life Cycle Assessment in Aviation. Sustainable Aviation. Springer, Cham. https://doi.org/10.1007/978-3-031-52772-2_6

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  • DOI: https://doi.org/10.1007/978-3-031-52772-2_6

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