Proposal and thermoeconomic analysis of geothermal flash binary power plants utilizing different types of organic flash cycle

Abstract In this work, an enhanced organic flash cycle (EOFC) employing an internal heat exchanger is proposed to be used to further recover the thermal energy of geofluid from a flash cycle for geothermal resources. The proposed flash-binary system is improved by applying two methods One method is usage of two separate flash evaporating steps instead of only one in EOFC (double flash). Another method is replacement of the throttling valve with a two- phase expander. A comprehensive thermoeconomic evaluation is carried out to investigate the effects of four key thermodynamic parameters on system performance. The results show that under the given condition, the net power output increases by 36.7% when two-phase expanders are employed in flash-binary geothermal cycle with single flash EOFC (TBSEOFC). Net power output increases by 1.2% for TBSEOFC by utilization of two separate flash steps in EOFC subsystem. In this case, unit cost of product insignificantly decreases. Moreover, a parametric optimization is conducted to obtain the optimum system performance.

[1]  S. De,et al.  Power by waste heat recovery from low temperature industrial flue gas by Organic Flash Cycle (OFC) and transcritical-CO2 power cycle: A comparative study through combined thermodynamic and economic analysis , 2017 .

[2]  Wei Yu,et al.  Dynamic modelling and validation of a commercial scale geothermal organic rankine cycle power plant , 2016 .

[3]  Na Zhang,et al.  Proposal and analysis of a novel ammonia–water cycle for power and refrigeration cogeneration , 2007 .

[4]  Ralph Greif,et al.  Comparison of the Organic Flash Cycle (OFC) to other advanced vapor cycles for intermediate and high temperature waste heat reclamation and solar thermal energy , 2012 .

[5]  Ari Darmawan Pasek,et al.  Thermodynamics study of flash–binary cycle in geothermal power plant , 2011 .

[6]  G. Bodvarsson,et al.  The exergy of thermal water , 1972 .

[7]  Mehmet Kanoglu,et al.  Exergy analysis of a dual-level binary geothermal power plant , 2002 .

[8]  Frank P. Incropera,et al.  Fundamentals of Heat and Mass Transfer , 1981 .

[9]  Li Zhao,et al.  Analysis of zeotropic mixtures used in low-temperature solar Rankine cycles for power generation , 2009 .

[10]  George Papadakis,et al.  Low­grade heat conversion into power using organic Rankine cycles - A review of various applications , 2011 .

[11]  Ennio Macchi,et al.  Technical and economical analysis of a solar–geothermal hybrid plant based on an Organic Rankine Cycle , 2011 .

[12]  Ibrahim Dincer,et al.  Exergy: Energy, Environment and Sustainable Development , 2007 .

[13]  Mehmet Kanoglu,et al.  Performance and parametric investigation of a binary geothermal power plant by exergy , 2008 .

[14]  François Maréchal,et al.  Environomic optimal configurations of geothermal energy conversion systems: Application to the future construction of Enhanced Geothermal Systems in Switzerland , 2012 .

[15]  Xinghua Liu,et al.  System performance optimization of ORC-based geo-plant with R245fa under different geothermal water inlet temperatures , 2017 .

[16]  Ahmet Daǧdaş.  Performance optimisation of the combined single flash binary geothermal power plant , 2011 .

[17]  Renique J. Murray,et al.  Thermo-economic modeling of a solid oxide fuel cell/gas turbine power plant with semi-direct coupling and anode recycling , 2010 .

[18]  Recep Ozturk,et al.  Thermodynamic evaluation of Denizli Kızıldere geothermal power plant and its performance improvement , 2005 .

[19]  M. J. Moran,et al.  Thermal design and optimization , 1995 .

[20]  Mortaza Yari,et al.  Exergetic analysis of various types of geothermal power plants , 2010 .

[21]  Adrian Bejan,et al.  Thermodynamic optimization of the match between two streams with phase change , 2000 .

[22]  Marc A. Rosen,et al.  Exergoeconomic and environmental analyses of CO 2 /NH 3 cascade refrigeration systems equipped with different types of flash tank intercoolers , 2016 .

[23]  Fabio Rinaldi,et al.  Exergetic, economic and environmental (3E) analyses, and multi-objective optimization of a CO2/NH3 cascade refrigeration system , 2014 .

[24]  Lichang Huang.  The Case Studies of Mid-low Temperature Geothermal Power Plant in China , 2015 .

[25]  Zhen Lu,et al.  Performance analysis and optimization of organic Rankine cycle (ORC) for waste heat recovery , 2007 .

[26]  Ahmet Dagdas,et al.  Performance Analysis and Optimization of Double-Flash Geothermal Power Plants , 2007 .

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

[28]  Sang Hee Park,et al.  Comparative analysis of thermodynamic performance and optimization of organic flash cycle (OFC) and organic Rankine cycle (ORC) , 2016 .

[29]  Ralph Greif,et al.  Increased power production through enhancements to the Organic Flash Cycle (OFC) , 2012 .

[30]  A. H. Mosaffa,et al.  Thermoeconomic analysis of a new combination of ammonia/water power generation cycle with GT-MHR cycle and LNG cryogenic exergy , 2017 .

[31]  Pradeep K. Sahoo,et al.  Thermoeconomic evaluation and optimization of an aqua-ammonia vapour-absorption refrigeration system , 2006 .

[32]  Yiping Dai,et al.  Thermodynamic analysis and optimization of a flash-binary geothermal power generation system , 2015 .

[33]  Gang Xu,et al.  An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory , 2014 .

[34]  Majid Amidpour,et al.  Thermoeconomic analysis and optimization of an ammonia–water power/cooling cogeneration cycle , 2012 .

[35]  Li Zhao,et al.  A comparative study of pure and zeotropic mixtures in low-temperature solar Rankine cycle , 2010 .

[36]  A. H. Mosaffa,et al.  Thermo-economic analysis of combined different ORCs geothermal power plants and LNG cold energy , 2017 .

[37]  Maoqing Li,et al.  Thermo-economic analysis and comparison of a CO2 transcritical power cycle and an organic Rankine cycle , 2014 .

[38]  Mortaza Yari,et al.  Exergoeconomic analysis and optimization of basic, dual-pressure and dual-fluid ORCs and Kalina geothermal power plants: A comparative study , 2015 .