Waste Heat Recovery in Diesel Engines using the Organic Rankine Cycle- Potential of Heat Recovery in the Volvo D13 Engine for Marine and Standby Power Generation Applications
Typ
Examensarbete för masterexamen
Program
Automotive engineering (MPAUT), MSc
Publicerad
2020
Författare
Bharadwat, Anil Gopinath
Al Haji, Wael
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The current global warming situation and various other environmental challenges
call for innovative and easy-to-implement technologies to help counter the effect.
One of the ways is to increase the efficiency of already existing systems to help push
out more work for the same amount of energy input. In some internal combustion
engines, roughly 30% of the input energy could be lost in the exhaust gases with an
additional 30% wasted as heat. This wasted energy can be partly recovered using
waste heat recovery(WHR) technologies. The recovered energy is then converted to
electrical or mechanical energy for further use. The aim of the project is to study
the feasibility of waste heat recovery in a Volvo D13 diesel engine with respect to
fuel consumption using an organic Rankine cycle for marine and power generation
applications. The project also includes brief evaluation of various available alternative
WHR technologies. A 0D analysis was conducted using Matlab to select an
appropriate working fluid based on the maximum power output and 1D simulations
were done with the help of GT-Power and Matlab/Simulink. The operating points
were selected based on field test data for both the applications. The 0D and 1D simulations
showed that a considerable amount of energy can be recovered from both
the applications. The marine and the power generation application yielded roughly
7% of the engine output power from the 1D simulations done using GT-Suite. The
two applications had about 9% increase in power output from the 1D simulations
done using Simulink. This increase in turn contributes to higher fuel savings hence
lowering emissions in general. The 1D simulations highlighted various parameters
such as pump speed and expander speed which affected the process. The results
from 0D and 1D simulations were also compared for both the applications. The 1D
simulations using Simulink had the highest power output and the cause of difference
in the power output from other methods were discussed. From the results, it was
then concluded that the inclusion of a WHR unit for the Volvo D13 engine has
potential and further investigation and fine tuning of this setup will prove advantageous
in helping combat the environmental challenges being faced today.
Beskrivning
Ämne/nyckelord
Waste Heat Recovery , Volvo D13 , Organic Rankine Cycle , Diesel Engine , Recuperator , 0-D Simulations , 1-D Simulations , Marine Engine , Standby Power Generation Engine