Summer performance analysis of coal-based CCHP with new configurations comparing with separate system

Abstract Conventional coal-based CCHP system currently is believed to be less efficient than separate vapor compression cooling system in summer. In this paper, new configurations of CCHP system (N-CCHP) are proposed and studied which apply comprehensive methods to improve the system performance. In the N-CCHP, an absorption heat pump is applied in power plant to heat the primary water instead of a traditional heat exchanger. And, a small turbine is used to improve system performance with high bleeding steam pressure. In substation, the primary water is used to drive an absorption chiller and liquid desiccant equipment in series. The domestic water is also produced by the primary water after regeneration of liquid desiccant. Key influencing factors of the N-CCHP system have been fully discussed. In this way, a highly efficient N-CCHP system configuration is obtained and is analyzed to compare with the electricity driven vapor compression (VC) refrigeration system in summer. Results show that the N-CCHP is energy saving and own better performances when the primary water transmission distance is less than 60 km, or the COP of the vapor compression chiller is lower than 7.

[1]  Jiangjiang Wang,et al.  An improved operation strategy of combined cooling heating and power system following electrical load , 2015 .

[2]  Borong Lin,et al.  Annual performance of liquid desiccant based independent humidity control HVAC system , 2006 .

[3]  Peter Rodgers,et al.  Trigeneration scheme for energy efficiency enhancement in a natural gas processing plant through turbine exhaust gas waste heat utilization , 2012 .

[4]  Ruzhu Wang,et al.  COMBINED COOLING, HEATING AND POWER: A REVIEW , 2006 .

[5]  Tan Yu-fei,et al.  Numerical simulation of a new district cooling system in cogeneration plants , 2012 .

[6]  Fang Fang,et al.  A new operation strategy for CCHP systems with hybrid chillers , 2012 .

[7]  Reinhard Radermacher,et al.  Performance characterization of gas engine generator integrated with a liquid desiccant dehumidification system , 2009 .

[8]  Zhiqiang Zhai,et al.  Performance comparison of combined cooling heating and power system in different operation modes , 2011 .

[9]  J. Y. Wu,et al.  Theoretical research of a silica gel–water adsorption chiller in a micro combined cooling, heating and power (CCHP) system , 2009 .

[10]  Yi Jiang,et al.  A new type of district heating method with co-generation based on absorption heat exchange (co-ah cycle) , 2011 .

[11]  Lin Fu,et al.  The Energy Efficiency and Economic Feasibility Analysis of the Distributed Absorption Cooling Combined With District Heating System , 2009 .

[12]  Farouk Fardoun,et al.  Review of tri-generation technologies: Design evaluation, optimization, decision-making, and selection approach , 2016 .

[13]  Laura Vanoli,et al.  Micro-combined heat and power in residential and light commercial applications , 2003 .

[14]  K. Daou,et al.  Desiccant cooling air conditioning : a review , 2006 .

[15]  Yan Li,et al.  A technology review on recovering waste heat from the condensers of large turbine units in China , 2016 .

[16]  Yong Tae Kang,et al.  High efficiency H2O/LiBr double effect absorption cycles with multi-heat sources for tri-generation application , 2017 .

[17]  Borong Lin,et al.  Combined cogeneration and liquid-desiccant system applied in a demonstration building , 2004 .

[18]  Yi Jiang,et al.  Energy utilization evaluation of CCHP systems , 2006 .

[19]  Ruzhu Wang,et al.  A REVIEW OF THERMALLY ACTIVATED COOLING TECHNOLOGIES FOR COMBINED COOLING, HEATING AND POWER SYSTEMS , 2011 .

[20]  Xi Zhuo Jiang,et al.  Thermodynamic boundaries of energy saving in conventional CCHP (Combined Cooling, Heating and Power) systems , 2016 .

[21]  Marco Badami,et al.  Performance analysis of an innovative small-scale trigeneration plant with liquid desiccant cooling system , 2009 .

[22]  Jiang Yi,et al.  Influence of supply and return water temperatures on the energy consumption of a district cooling system , 2001 .

[23]  Hui Li,et al.  Laboratory research on combined cooling, heating and power (CCHP) systems , 2009 .

[24]  Wentao Li,et al.  Energy efficiency analysis of condensed waste heat recovery ways in cogeneration plant , 2015 .

[25]  Minlin Yang,et al.  Research, development and the prospect of combined cooling, heating, and power systems , 2010 .

[26]  Pedro J. Mago,et al.  Combined cooling, heating and power: A review of performance improvement and optimization , 2014 .

[27]  Patrick E. Phelan,et al.  Economic feasibility of combined heat and power and absorption refrigeration with commercially available gas turbines , 2001 .

[28]  Hans-Martin Henning,et al.  Micro tri-generation system for indoor air conditioning in the Mediterranean climate , 2007 .

[29]  Yan Li,et al.  Technology application of district heating system with Co-generation based on absorption heat exchange , 2015 .

[30]  Yang Shi,et al.  Combined cooling, heating and power systems: A survey , 2014 .

[31]  Ibrahim Dincer,et al.  Efficiency analysis of a cogeneration and district energy system , 2005 .

[32]  M. D. Schicktanz,et al.  Primary energy and economic analysis of combined heating, cooling and power systems , 2011 .