Experimental study of converging-diverging nozzle to generate power by Trilateral Flash Cycle (TFC)

Abstract Recovering heat from low grade heat resources for producing power is of high demand and interest. For this purpose, the an experimental study of converging-Diverging nozzle to generate power in Trilateral Flash Cycle (TFC) is investigated in this paper. In the proposed system, performance of a designed and manufactured to recover the heat and convert the heat energy to mechanical energy has been investigated. In this system, Isopentane, which is selected to be the working fluid due to its low boiling temperature, is heated by low temperature hot water and pumped through a two-phase flow nozzle, where the energy conversion takes place. In the nozzle, part of the liquid evaporates and the accelerated mixture exits the nozzle and impacts on a Pelton turbine bucket shape target. The high potential of power generation from low temperature heat resources is demonstrated through theoretical analysis. Generated force of high speed flow out of two phase nozzle has been experimentally measured in lab scale test rig and isentropic efficiency of the nozzle has been calculated based exit speed of the working fluid. Around 45% isentropic efficiency has been shown From the test results. In addition, 1.5 N–4 N force increase was detected by increasing temperature of working fluid from 30 °C to 70 °C correspondingly. The results of this experiment can be applied on a power plant waste heat as a case study, where the increased energy conversion efficiency is demonstrated on the binary cycle.

[1]  Abhijit Date,et al.  Performance of a rotating two-phase turbine for combined power generation and desalination , 2015 .

[2]  Aliakbar Akbarzadeh,et al.  Power Generation from Low Grade Heat Using Trilateral Flash Cycle , 2017 .

[3]  Aliakbar Akbarzadeh,et al.  Prospects of Power Generation from Low Grade Heat Resources through Trilateral Flash Cycle (TFC) Using Impulse Turbine , 2017 .

[4]  Huijuan Chen,et al.  The Conversion of Low-Grade Heat into Power Using Supercritical Rankine Cycles , 2010 .

[5]  W. J. Comfort.  Applicability of the Hero turbine for energy conversion from low-quality, two-phase, inlet fluids , 1978 .

[6]  Aliakbar Akbarzadeh,et al.  The efficiency of a two-phase nozzle as a motion force for power generation from low-temperature resources , 2014 .

[7]  D. Sánchez,et al.  Alternative ORC bottoming cycles FOR combined cycle power plants , 2009 .

[8]  Thomas J. Bruno,et al.  Rapid Screening of Fluids for Chemical Stability in Organic Rankine Cycle Applications , 2005 .

[9]  Chechet Biliyok,et al.  Trilateral Flash Cycle for Recovery of Power from a Finite Low-Grade Heat Source , 2014 .

[10]  Johann Fischer,et al.  Comparison of trilateral cycles and organic Rankine cycles , 2011 .

[11]  Alina Adriana Minea,et al.  Advances in Industrial Heat Transfer , 2012 .

[12]  Alberto Coronas,et al.  Modelling and optimisation of solar organic rankine cycle engines for reverse osmosis desalination , 2008 .

[13]  Junichi Ohta,et al.  Performance Characteristics of Divergent-Convergent Nozzles for Subcooled Hot Water , 1988 .

[14]  Ibrahim Dincer,et al.  Thermodynamic analysis of a novel ammonia-water trilateral Rankine cycle , 2008 .

[15]  Ahmed Kovacevic,et al.  An Improved System for Power Recovery from Higher Enthalpy Liquid-Dominated Fields , 2005 .

[16]  M. M. Rahman,et al.  A supercritical Rankine cycle using zeotropic mixture working fluids for the conversion of low-grade , 2011 .

[17]  Guoliang Ding,et al.  Numerical Modeling of Refrigerants Flowing through Short Tube Orifices , 2010 .

[18]  A. A. Kornhauser,et al.  Improvements to the ejector expansion refrigeration cycle , 1996, IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference.

[19]  T. Hung.  Waste heat recovery of organic Rankine cycle using dry fluids , 2001 .

[20]  S. Tassou,et al.  Development and analysis of a packaged Trilateral Flash Cycle system for low grade heat to power conversion applications , 2017 .

[21]  E. S. Starkman,et al.  Expansion of a Very Low Quality Two-Phase Fluid Through a Convergent-Divergent Nozzle , 1964 .

[22]  Abhijit Date,et al.  Efficiency of a two-phase nozzle for geothermal power generation , 2014 .

[23]  Ahmed Kovacevic,et al.  Steam as the working fluid for power recovery from exhaust gases by means of screw expanders , 2011 .

[24]  Chris Williams,et al.  Techno-economic survey and design of a pilot test rig for a trilateral flash cycle system in a steel production plant , 2017 .

[25]  E. Stefanakos,et al.  A REVIEW OF THERMODYNAMIC CYCLES AND WORKING FLUIDS FOR THE CONVERSION OF LOW-GRADE HEAT , 2010 .

[26]  M Oreijah.  Power generation through an organic fluid trilateral flash cycle using a simple reaction turbine utilising low-grade thermal sources , 2014 .

[27]  Nobuyuki Takenaka,et al.  Performance and flow characteristics of nozzles for initially subcooled hot water (influence of turbulence and decompression rate) , 1993 .

[28]  Alan A. Kornhauser.  The Use Of An Ejector In A Geothermal Flash System , 1990, Proceedings of the 25th Intersociety Energy Conversion Engineering Conference.

[29]  H. A. Ajimotokan.  Efficiency analysis of trilateral-cycle power systems for waste heat recovery-to-power generation , 2016 .

[30]  H. A. Ajimotokan,et al.  Thermodynamic performance simulation and design optimisation of trilateral-cycle engines for waste heat recovery-to-power generation , 2015 .

[31]  Yuanyang Zhao,et al.  An Experimental Study on Energy Recovery by a Pelton-Type Expander in a Domestic Refrigeration System , 2009 .

[32]  Yasuo Mori,et al.  Fundamental study on production of high-speed mist flow by expansion of low-temperature hot water. , 1985 .

[33]  H. A. Ajimotokan.  A STUDY OF TRILATERAL FLASH CYCLES FOR LOW-GRADE WASTE HEAT RECOVERY-TO- POWER GENERATION , 2014 .

[34]  Alan A. Kornhauser,et al.  Efficiency of a flashing flow nozzle , 1996, IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference.

[35]  John H. Leigh.  Multiple Phase Ejector Pilot Plant , 1970 .