Experimental and Numerical Characterization of the Sliding Rotary Vane Expander Intake Pressure in Order to Develop a Novel Control-Diagnostic Procedure

Waste heat recovery via Organic Rankine Cycle (ORC)-based power units represents one of the most promising solutions to counteract the effects of CO 2 emissions on climate change. Nevertheless, several aspects are still limiting its development on the on-the-road transportation sector. Among these aspects, the significant variations of the conditions of the hot source (exhaust gases) are a crucial point. Therefore, the components of the ORC-based unit operate far from the design point if the main operating parameters of the plant are not suitably controlled. The maximum pressure of the cycle is one of the most important variables to be controlled for the importance it has on the effectiveness of the recovery and on safety of operation. In this paper, a wide experimental and theoretical activity was performed in order to define the operating parameters that mostly affect the maximum pressure of the recovery unit. The results showed that the mass flow rate provided by the pump and the expander volumetric efficiency were the main drivers that affect the plant maximum pressure. Subsequently, through a validated model of the expander, a diagnostic map was outlined to evaluate if the expander and, consequently, the whole plant were properly working.

[1]  Roberto Cipollone,et al.  Fuel economy benefits of a new engine cooling pump based on sliding vane technology with variable eccentricity , 2015 .

[2]  D. D. Battista,et al.  On the limiting factors of the waste heat recovery via ORC-based power units for on-the-road transportation sector , 2018 .

[3]  Zhen Lu,et al.  Dynamic modeling and simulation of an Organic Rankine Cycle (ORC) system for waste heat recovery , 2008 .

[4]  Roberto Cipollone,et al.  Development of an Organic Rankine Cycle system for exhaust energy recovery in internal combustion engines , 2015 .

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

[6]  D. D. Battista,et al.  Experimental Analysis of an Organic Rankine Cycle Plant Bottoming a Heavy-Duty Engine Using Axial Turbine as Prime Mover , 2017 .

[7]  Christos N. Markides,et al.  Off-design optimisation of organic Rankine cycle (ORC) engines with piston expanders for medium-scale combined heat and power applications , 2019, Applied Energy.

[8]  Andrea Toffolo,et al.  An Organic Rankine Cycle off-design model for the search of the optimal control strategy , 2013 .

[9]  Madiha Nadri,et al.  Transient performance evaluation of waste heat recovery rankine cycle based system for heavy duty trucks , 2016 .

[10]  Roberto Cipollone,et al.  Dual intake rotary vane expander technology: Experimental and theoretical assessment , 2019, Energy Conversion and Management.

[11]  Hui Xie,et al.  Efficiency Analysis of the Rankine Cycle System Used for Engine Exhaust Energy Recovery under Driving Cycle , 2014 .

[12]  Pramod Kumar,et al.  Development of a generic tool to design scroll expanders for ORC applications , 2016 .

[13]  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 .

[14]  D. D. Battista,et al.  Development of Thermal Modeling in Support of Engine Cooling Design , 2013 .

[15]  Vaclav Vodicka,et al.  Impact of major leakages on characteristics of a rotary vane expander for ORC , 2017 .

[16]  Jiang Qin,et al.  Effect of flow losses in heat exchangers on the performance of organic Rankine cycle , 2019, Energy.

[17]  S. D. Probert,et al.  Performances of multi-vane expanders , 1985 .

[18]  A. Romagnoli,et al.  Direct vs indirect evaporation in Organic Rankine Cycle (ORC) systems: A comparison of the dynamic behavior for waste heat recovery of engine exhaust , 2019, Applied Energy.

[19]  Xueyuan Peng,et al.  Experimental investigation on the internal working process of a CO2 rotary vane expander , 2009 .

[21]  D. D. Battista,et al.  A Model Approach to the Sizing of an ORC Unit for WHR in Transportation Sector , 2017 .

[22]  Roberto Cipollone,et al.  A novel engine cooling system with two circuits operating at different temperatures , 2013 .

[23]  Francesco Fornarelli,et al.  Investigation of a pressure compensated vane pump , 2018 .

[24]  Roberto Cipollone,et al.  Performances of an ORC power unit for Waste Heat Recovery on Heavy Duty Engine , 2017 .

[25]  Muhammad Imran,et al.  Volumetric expanders for low grade heat and waste heat recovery applications , 2016 .

[26]  Roberto Cipollone,et al.  Waste heat recovery of an ORC-based power unit in a turbocharged diesel engine propelling a light duty vehicle , 2015 .

[27]  Jianhua Zhang,et al.  Dynamic modeling and multivariable control of organic Rankine cycles in waste heat utilizing processes , 2012, Comput. Math. Appl..

[28]  Matthew Ellis,et al.  Validation and Design of Heavy Vehicle Cooling System with Waste Heat Recovery Condenser , 2014 .

[29]  Tong Zhu,et al.  Experimental investigation on the effect of working fluid charge in a small-scale Organic Rankine Cycle under off-design conditions , 2019, Energy.

[30]  Roberto Cipollone,et al.  Development and numerical modelling of a supercharging technique for positive displacement expanders , 2018 .

[31]  Vincent Lemort,et al.  Dynamic modeling and optimal control strategy of waste heat recovery Organic Rankine Cycles , 2011 .

[32]  S. Tassou,et al.  An appraisal of proportional integral control strategies for small scale waste heat to power conversion units based on Organic Rankine Cycles , 2018, Energy.

[33]  Roberto Cipollone,et al.  Experimental and numerical characterization of a positive displacement vane expander with an auxiliary injection port for an ORC-based power unit , 2018, Energy Procedia.

[34]  Roberto Cipollone,et al.  Design and analysis of a sliding vane pump for waste heat to power conversion systems using organic fluids , 2017 .

[35]  Changwei Liu,et al.  Off-design performance analysis of basic ORC, ORC using zeotropic mixtures and composition-adjustable ORC under optimal control strategy , 2019, Energy.

[36]  Vincent Lemort,et al.  Experimental study and modeling of an Organic Rankine Cycle using scroll expander , 2010 .

[37]  Vincent Lemort,et al.  Experimental investigation and optimal performance assessment of four volumetric expanders (scroll, screw, piston and roots) tested in a small-scale organic Rankine cycle system , 2018, Energy.

[38]  Roberto Capata,et al.  Expander selection for an on board ORC energy recovery system , 2017 .

[39]  T. Hung,et al.  Performance analysis of low speed axial impulse turbine using two type nozzles for small-scale organic Rankine cycle , 2019, Energy.

[40]  Roberto Cipollone,et al.  Modeling and Experimental Activities on a Small-scale Sliding Vane Pump for ORC-based Waste heat Recovery Applications , 2016 .

[41]  L. Tribioli,et al.  Comparison of different layouts for the integration of an organic Rankine cycle unit in electrified powertrains of heavy duty Diesel trucks , 2019, Energy Conversion and Management.

[42]  P. R. Spina,et al.  Experimental analysis of a micro-ORC driven by piston expander for low-grade heat recovery , 2019, Applied Thermal Engineering.