Transcript Waste Heat Recovery

Waste Heat Recovery
Waste Heat Recovery
from
Combustion Engines
Gunnar Latz
PhD Student
Chalmers University of Technology
Energirelaterad fordonsforskning
Göteborg
09.10.2014
Waste Heat Recovery
Project facts
Program: Fordonsstrategisk Forskning och Innovation (FFI)
Project start/end: 01/2014 – 06/2015 (2. Phase)
Project leader: Ingemar Denbratt, Chalmers
Budget: 1.195 kSEK per university (2014)
Waste Heat Recovery
Project organisation
The project is performed and coordinated by the three
Swedish competence centers in combustion technology
CCGEx (KTH)
KCFP (Lund University)
Competence Center for Gas Exchange
Kompetenscentrum Förbränningsprocesser
CERC (Chalmers)
Combustion Engine Research Center
Volvo Car Corporation
Waste Heat Recovery
Motivation – Energy balance
~21 %
Fuel
Energy
(100 %)
Coolant
and
radiation
Mechanical Energy
~42 % 46 %
~11 %
Charge air
cooler
(200°C)
~15 %
~11 %
Exhaust
gas
(250°C)
EGR
(450°C)
Heat
recovery
Source: GT-Power model for Volvo MD13 engine
Waste Heat Recovery
Project goals
• Evaluation of different heat-recovery technologies
• Identifying gaps in knowledge for the respective
technology
• Creating simulation models and validate them by means of
experiments or available experimental data
• Providing scenarios for the applicability both in light duty
and heavy duty vehicles
Waste Heat Recovery
CCGEx
Project: Turbocompound
PhD Student: Habib Aghaali (since March 2012, before: Gustav Ericsson)
Senior researcher: Hans-Erik Ångström
Fuel consumption improvement [%]
Waste Heat Recovery
Turbocompound
+ Divided Exhaust Period (DEP)
+ Externally Divided Exhaust Period (ExDEP)
 Potential to decrease fuel consumption up to 4 %
Waste Heat Recovery
CERC
Project: Rankine Cycle
PhD Student: Gunnar Latz
Senior researcher: Sven Andersson, Karin Munch
Waste Heat Recovery
Simulation models
Waste heat (e.g. exhaust gas)
Experiments
Design
data
Evaporator
Fluid
pump
Rankine
Cycle
Expansion
device
Condenser
Work
output
Validation
data
 Potential to decrease fuel consumption by 4 – 6 %
Waste Heat Recovery
KCFP
Project: Humid Air Motor (HAM)
PhD Student: Prakash Narayanan (since October 2011, before: Mengqin Shen)
Senior researcher: Martin Tunér, Per Tunestål
Waste Heat Recovery
Engine
Humidifier
 Reduced in-cylinder temperatures  Reduction of NOx
 Benefits of the HAM concept over conventional EGR engine:
1. Lower heat losses
2. “Free” vapor expansion over the turbine
3. Reduction of in-cylinder pumping losses
 Potential to decrease fuel consumption upto ~8% (best operating point)
Waste Heat Recovery
Thank you for your attention!