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A micro combined heat and power thermodynamic analysis and optimization

Gholizadeh, A ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1115/POWER2010-27281
  3. Publisher: 2010
  4. Abstract:
  5. In modeling and designing micro combined heat and power cycle most important point is recognition of how the cycle operates based on the first and second laws of thermodynamics simultaneously. Analyzing data obtained from thermodynamic analysis employed to optimize MCHP cycle. The data obtained from prime mover optimization has been used for basic stimulus cycle. Assumptions considered for prime mover optimization has been improved, for example in making optimum operation condition by using genetic algorithms constant pressure combustion chamber was considered. The exact value of downstream and upstream pressure changes in the combustion chamber reaction has been obtained. After extraction of the appropriate relationship for the primary stimulus cycle, data required for the overall cycle analysis identified, By using these data optimum total cycle efficiency and constructing the first and second laws of thermodynamics has been calculated for it. After reviewing Thermodynamic governing relations in each cycle and using the optimum values that the prime mover has been optimized with, other cycles have been optimized. In best performance condition of cycle, electrical efficiency was 41 percent and the overall efficiency of the cycle was 88 percent, respectively. After using the second law of thermodynamics mathematical model Second law of thermodynamics efficiency and entropy production rate was estimated. Second law of thermodynamics yield best performance against the 45.14 percent and the rate of entropy production in this case equal to 0.099 kW/K respectively. Copyright
  6. Keywords:
  7. Constant pressures ; Cycle analysis ; Cycle efficiency ; Electrical efficiency ; Energy ; Entropy production ; Entropy production rates ; Micro turbine ; Micro-CHP ; Micro-combined heat and power ; Optimum operation conditions ; Optimum value ; Overall efficiency ; Prime movers ; Second laws of thermodynamics ; Thermo dynamic analysis ; Upstream pressure ; Combustion ; Combustion chambers ; Efficiency ; Electric power generation ; Entropy ; Exergy ; Mathematical models ; Optimization ; Thermoanalysis ; Turbines ; Thermodynamics
  8. Source: American Society of Mechanical Engineers, Power Division (Publication) POWER, 13 July 2010 through 15 July 2010, Chicago, IL ; 2010 , Pages 599-605 ; 9780791849354 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1619953