Experimental Study of a Small Scale Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine with Focus on the Radial Inflow Turbine Expander Performance

Abstract The purpose of this work is to experimentally evaluate the effect on fuel efficiency of a small scale organic Rankine cycle (ORC) as a waste heat recovery system (WHRS) in a heavy duty diesel engine that operates at steady state conditions. The WHRS consists of two operating loops, namely a thermal oil loop that extracts heat from the engine exhaust gases, and the working fluid loop which is the ORC system. The expansion machine of the ORC system is a radial inflow turbine with a novel back-swept blading that was designed from scratch and manufactured specifically for this WHR application. The engine test conditions include a partial engine load and speed operating point where various operating conditions of the ORC unit were tested and the maximum thermal efficiency of the ORC was defined close to 4.3%. Simultaneously, the maximum generated power was 6.3 kW at 20,000 rpm and pressure ratio of 5.9. The isentropic efficiency reached its peak of 35.2% at 20,000 rpm and 27% at 15,000 rpm. The experimental results were compared with the CFD results using the same off-design conditions, and the results were in good agreement with a maximum deviation of 1.15% in the total efficiency. Last but not least, the engine-WHRS energy balance is also discussed and presented.

[1]  Robert Morgan,et al.  A comparative study between a Rankine cycle and a novel intra-cycle based waste heat recovery concepts applied to an internal combustion engine , 2016 .

[2]  Arnaud Legros,et al.  Performance of a radial-inflow turbine integrated in an ORC system and designed for a WHR on truck application: An experimental comparison between R245fa and R1233zd , 2017 .

[3]  Michele Pinelli,et al.  A Micro-ORC Energy System: Preliminary Performance and Test Bench Development , 2016 .

[4]  Xinli Wei,et al.  Design and experimental study of a small-sized organic Rankine cycle system under various cooling conditions , 2017 .

[5]  Mauro Venturini,et al.  Advances and challenges in ORC systems modeling for low grade thermal energy recovery , 2014 .

[6]  Vincent Lemort,et al.  Investigation on a scroll expander for waste heat recovery on internal combustion engines , 2013 .

[7]  Rongchao Zhao,et al.  Numerical study on steam injection in a turbocompound diesel engine for waste heat recovery , 2017 .

[8]  Alister Simpson,et al.  A Comparison of the Flow Structures and Losses Within Vaned and Vaneless Stators for Radial Turbines , 2009 .

[9]  Murat Erbas,et al.  Design of low temperature Organic Rankine Cycle and turbine , 2013, 4th International Conference on Power Engineering, Energy and Electrical Drives.

[10]  Violette Mounier,et al.  Potential of Small-Scale Turbomachinery for Waste Heat Recovery on Automotive Internal Combustion Engines , 2015 .

[11]  Lorenzo Tocci,et al.  Thermodynamic and technical criteria for the optimal selection of the working fluid in a mini-ORC , 2016 .

[12]  Shixue Wang,et al.  Theoretical analysis of a thermoelectric generator using exhaust gas of vehicles as heat source , 2013 .

[13]  Torsten Fransson,et al.  Waste heat recovery Organic Rankine cycles in sustainable energy conversion: A state-of-the-art review , 2013 .

[14]  M. McLinden,et al.  NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 8.0 , 2007 .

[15]  Lorenzo Tocci,et al.  Variable geometry turbine design for off-highway vehicle organic rankine cycle waste heat recovery , 2016 .

[16]  S. Riffat,et al.  Experimental investigation of a biomass-fired ORC-based micro-CHP for domestic applications , 2012 .

[17]  Richard Stobart,et al.  The Potential for Thermo-Electric Devices in Passenger Vehicle Applications , 2010 .

[18]  Andreas Kugi,et al.  Modeling and optimal steady-state operating points of an ORC waste heat recovery system for diesel engines , 2017 .

[19]  Fuhaid Alshammari,et al.  Radial Expander Design for an Engine Organic Rankine Cycle Waste Heat Recovery System , 2017 .

[20]  N. Baines.  Axial and Radial Turbines , 2003 .

[21]  Martin Tuner,et al.  Waste Heat Recovery from Multiple Heat Sources in a HD Truck Diesel Engine Using a Rankine Cycle - A Theoretical Evaluation , 2012 .

[22]  Saffa Riffat,et al.  Expanders for micro-CHP systems with organic Rankine cycle , 2011 .

[23]  Lorenzo Tocci,et al.  Effect of an ORC Waste Heat Recovery System on Diesel Engine Fuel Economy for Off-Highway Vehicles , 2017 .

[24]  Anthony Paul Roskilly,et al.  Experimental Investigation of a Scroll Expander for Power Generation Part of a Resorption Cogeneration , 2015 .

[25]  Daniele Fiaschi,et al.  Thermo-fluid dynamics preliminary design of turbo-expanders for ORC cycles , 2012 .

[26]  Tomasz Z. Kaczmarczyk,et al.  Experimental investigation of the domestic CHP ORC system in transient operating conditions , 2017 .

[27]  Fuhaid Alshammari,et al.  Radial turbine expander design for organic rankine cycle, waste heat recovery in high efficiency, off-highway vehicles , 2016 .

[28]  Richard Stobart,et al.  Heat Recovery and Bottoming Cycles for SI and CI Engines - A Perspective , 2006 .

[29]  Daniele Cocco,et al.  Small-scale CSP plant coupled with an ORC system for providing dispatchable power: the Ottana Solar Facility , 2017 .

[30]  Jian Song,et al.  Performance analysis of a dual-loop organic Rankine cycle (ORC) system with wet steam expansion for engine waste heat recovery , 2015 .

[31]  Michael Glensvig,et al.  Testing of a Long Haul Demonstrator Vehicle with a Waste Heat Recovery System on Public Road , 2016 .

[32]  C. J. Bliem,et al.  Initial results for supercritical cycle experiments using pure and mixed-hydrocarbon working fluids , 1984 .

[33]  Kiyohiro Shimokawa,et al.  A Study of the Rankine Cycle Generating System for Heavy Duty HV Trucks , 2014 .

[34]  K. Qiu,et al.  An organic Rankine cycle system for solar thermal power applications , 2014, 2014 International Conference on Renewable Energy Research and Application (ICRERA).

[35]  Jiang Wang,et al.  Performance evaluation of a low-temperature solar Rankine cycle system utilizing R245fa , 2010 .

[36]  Raya Al-Dadah,et al.  Mean-line modeling and CFD analysis of a miniature radial turbine for distributed power generation systems , 2016 .

[37]  Jian Zhang,et al.  Thermoeconomic multi-objective optimization of a dual loop organic Rankine cycle (ORC) for CNG engine waste heat recovery , 2017 .

[38]  Saffa Riffat,et al.  Preliminary experimental investigations of a biomass-fired micro-scale CHP with organic Rankine cycle , 2010 .

[39]  R. Stobart,et al.  The Potential for Thermo-Electric Regeneration of Energy in Vehicles , 2009 .

[40]  Guohong Tian,et al.  Modellingand Optimisation on Scroll Expander for Waste Heat Recovery Organic Rankine Cycle , 2015 .

[41]  Edward F. Doyle,et al.  Compounding the Truck Diesel Engine with an Organic Rankine-Cycle System , 1976 .

[42]  Hongguang Zhang,et al.  A regenerative supercritical-subcritical dual-loop organic Rankine cycle system for energy recovery from the waste heat of internal combustion engines , 2017 .

[43]  Aleksandra Borsukiewicz-Gozdur,et al.  Design and performance measurements of an organic vapour turbine , 2014 .

[44]  Ke Zeng,et al.  New Technology of Thermodynamic Cycle for Waste Heat Recovery of Vehicle Gasoline Engine , 2009, 2009 Asia-Pacific Power and Energy Engineering Conference.

[45]  S. Quoilin,et al.  Performance and design optimization of a low-cost solar organic Rankine cycle for remote power generation , 2011 .

[46]  Maoqing Li,et al.  Construction and preliminary test of a low-temperature regenerative Organic Rankine Cycle (ORC) using R123 , 2013 .

[47]  Ashok Misra,et al.  Performance analysis of an Organic Rankine Cycle with superheating under different heat source temperature conditions , 2011 .

[48]  Józef Rak,et al.  Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system , 2017 .

[49]  Rémi Revellin,et al.  Organic Rankine cycle design and performance comparison based on experimental database , 2017 .

[50]  Dimitrios T. Hountalas,et al.  Recovering Energy from the Diesel Engine Exhaust Using Mechanical and Electrical Turbocompounding , 2007 .

[51]  Ziwen Xing,et al.  Performance study of a twin-screw expander used in a geothermal organic Rankine cycle power generator , 2015 .

[52]  Boyuan Fan,et al.  A performance analysis of a novel system of a dual loop bottoming organic Rankine cycle (ORC) with a light-duty diesel engine , 2013 .

[53]  Tzu-Chen Hung,et al.  Experimental study on organic Rankine cycle utilizing R245fa, R123 and their mixtures to investigate the maximum power generation from low-grade heat , 2017 .

[54]  Takahashi Kazuya,et al.  Study on Maximizing Exergy in Automotive Engines , 2007 .

[55]  Christopher Sellers,et al.  Field operation of a 125kW ORC with ship engine jacket water , 2017 .

[56]  Li Zhao,et al.  A review of working fluid and expander selections for organic Rankine cycle , 2013 .

[57]  Terrence L. Chambers,et al.  Installation and Operation of Parabolic Trough Organic Rankine Cycle Solar Thermal Power Plant in South Louisiana , 2014 .

[58]  Christopher Depcik,et al.  Review of organic Rankine cycles for internal combustion engine exhaust waste heat recovery , 2013 .