Thermodynamic analysis of a novel power plant with LNG (liquefied natural gas) cold exergy exploitation and CO2 capture

The LNG (liquefied natural gas) regasification process is a source of cold exergy that is suitable to be recovered to improve the efficiency of thermal power plants. In this paper, an innovative power plant with LNG (liquefied natural gas) exergy utilisation and the capture of CO2 proceeding from the flue gases is presented. It is characterised by the recovery of LNG cold exergy in a closed Brayton cycle and through direct expansion in an expander coupled to an electrical generator. Moreover, this novel power plant configuration allows CO2 capture, through an oxy-fuel combustion system and a Rankine cycle that operates with the flue gases themselves and in quasi-critical conditions. The greatest advantage of this plant is that all the recoverable LNG exergy is used to increase the efficiency of the CBC (closed Brayton cycle) and in direct expansion whereas, in other power cycles found in literature that associate LNG regasification and CO2 capture, part of the LNG exergy is used for condensing flue gas CO2 for its subsequent capture. As a result, a high efficiency power plant is achieved, exceeding 65%, with almost zero greenhouse gas emissions.

[1]  T. J. Kotas,et al.  The Exergy Method of Thermal Plant Analysis , 2012 .

[2]  Hongguang Jin,et al.  Novel cogeneration power system with liquefied natural gas (LNG) cryogenic exergy utilization , 2004 .

[3]  Kaihua Guo,et al.  A novel cryogenic power cycle for LNG cold energy recovery , 2011 .

[4]  Ramón Ferreiro García,et al.  Thermodynamic analysis of a Brayton cycle and Rankine cycle arranged in series exploiting the cold exergy of LNG (liquefied natural gas) , 2014 .

[5]  Ramón Ferreiro García,et al.  Cold exergy recovery during LNG regasification through a closed Brayton cycle , 2014 .

[6]  Domenico Panno,et al.  Potential applications using LNG cold energy in Sicily , 2008 .

[7]  Huan Wang,et al.  Thermodynamic optimization of the operating parameters for a combined power cycle utilizing low-temperature waste heat and LNG cold energy , 2013 .

[8]  M. Nakaiwa,et al.  Evaluation of an energy supply system with air separation , 1996 .

[9]  E. Querol,et al.  Boil off gas (BOG) management in Spanish liquid natural gas (LNG) terminals , 2010 .

[10]  John Davison,et al.  Performance and costs of power plants with capture and storage of CO2 , 2007 .

[11]  Chonghun Han,et al.  Design and optimization of multi-component organic rankine cycle using liquefied natural gas cryogenic exergy , 2014 .

[12]  Roberto Aguilera,et al.  World natural gas endowment as a bridge towards zero carbon emissions , 2012 .

[13]  Jiuju Cai,et al.  Using cryogenic exergy of liquefied natural gas for electricity production with the Stirling cycle , 2013 .

[14]  Daejun Chang,et al.  Analysis and optimization of cascade Rankine cycle for liquefied natural gas cold energy recovery , 2013 .

[15]  Yiping Dai,et al.  Thermodynamic analysis and optimization of a transcritical CO2 geothermal power generation system based on the cold energy utilization of LNG , 2014 .

[16]  Xu Cao,et al.  Thermodynamic analysis and optimization of a solar-powered transcritical CO2 (carbon dioxide) power cycle for reverse osmosis desalination based on the recovery of cryogenic energy of LNG (liquefied natural gas) , 2014 .

[17]  Celidonio Dispenza,et al.  Exergy recovery during LNG regasification: Electric energy production - Part one , 2009 .

[18]  Noam Lior,et al.  Thermoeconomic analysis of a novel zero-CO2-emission high-efficiency power cycle using LNG coldness , 2009 .

[19]  Mike Graham,et al.  Natural Gas: The Green Fuel of the Future , 2012 .

[20]  M. Salimpour,et al.  Proposing a novel combined cycle for optimal exergy recovery of liquefied natural gas , 2012 .

[21]  Noam Lior,et al.  Proposal and Analysis of a Novel Zero CO2 Emission Cycle With Liquid Natural Gas Cryogenic Exergy Utilization , 2006 .

[22]  Clive B. Beggs,et al.  Theoretical approach of freeze seawater desalination on flake ice maker utilizing LNG cold energy , 2015 .

[23]  Noam Lior,et al.  Configuration Analysis of a Novel Zero CO , 2003 .

[24]  J. Romero Gómez,et al.  High efficiency power plant with liquefied natural gas cold energy utilization , 2014 .

[25]  Peng Wang,et al.  A conceptual demonstration of freeze desalination-membrane distillation (FD-MD) hybrid desalination process utilizing liquefied natural gas (LNG) cold energy. , 2012, Water research.

[26]  Feng Liu,et al.  Simulation and optimization of a novel Rankine power cycle for recovering cold energy from liquefied natural gas using a mixed working fluid , 2014 .

[27]  Xiaojun Shi,et al.  Thermodynamic analysis of an LNG fuelled combined cycle power plant with waste heat recovery and utilization system , 2007 .

[28]  Li Yanzhong.  Combined cycle of air separation and natural gas liquefaction , 2008 .

[29]  J. Romero Gómez,et al.  Review of thermal cycles exploiting the exergy of liquefied natural gas in the regasification process , 2014 .

[30]  N. Woudstra,et al.  Understanding the exergy of cold: theory and practical examples , 2010 .

[31]  Kyu Suk Hwang,et al.  Design process of LNG heavy hydrocarbons fractionation: Low LNG temperature recovery , 2014 .

[32]  Satish Kumar,et al.  LNG: An eco-friendly cryogenic fuel for sustainable development , 2011 .

[33]  Meng Liu,et al.  COOLCEP (cool clean efficient power): A novel CO2-capturing oxy-fuel power system with LNG (liquefied natural gas) coldness energy utilization , 2010 .

[34]  Fernando G. Martins,et al.  Recent developments on carbon capture and storage: An overview , 2011 .

[35]  Tatiana Morosuk,et al.  Comparative evaluation of LNG based cogeneration systems using advanced exergetic analysis , 2011 .

[36]  Xiaojun Shi,et al.  Performance enhancement of conventional combined cycle power plant by inlet air cooling, inter-cooling and LNG cold energy utilization , 2010 .

[37]  L. Tagliafico,et al.  On the recovery of LNG physical exergy by means of a simple cycle or a complex system , 2002 .

[38]  Tatiana Morosuk,et al.  Advanced exergetic analysis of a novel system for generating electricity and vaporizing liquefied natural gas , 2010 .

[39]  Noam Lior,et al.  A novel near-zero CO2 emission thermal cycle with LNG cryogenic exergy utilization , 2006 .

[40]  K. Kim,et al.  Thermodynamic performance analysis of a combined power cycle using low grade heat source and LNG cold energy , 2014 .

[41]  Andrea Ramírez,et al.  Techno-economic prospects for CO2 capture from distributed energy systems , 2013 .

[42]  South Korea,et al.  REVIEW ON ECONOMICAL EFFICIENCY OF LNG COLD ENERGY USE IN SOUTH KOREA , 2006 .

[43]  Jiangfeng Wang,et al.  Thermodynamic analysis of an SOFC–GT–ORC integrated power system with liquefied natural gas as heat sink , 2013 .

[44]  Olav Bolland,et al.  A quantitative comparison of gas turbine cycles with CO2 capture , 2007 .

[45]  Antonio Messineo,et al.  LNG cold energy use in agro-food industry: A case study in Sicily , 2011 .

[46]  Il Moon,et al.  Current status and future projections of LNG demand and supplies: A global prospective , 2011 .