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Energy and Thermoeconomic Modeling CHP System in Order to Choose between Micro-Turbine and Internal Combustion Engine as the prime Mover

Nazemzadegan, Mohammad Reza | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45049 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Sattari, Surena
  7. Abstract:
  8. In this project, a co-generation system with the operation capacity of less than 1000 kilowatts has been studied. The main purpose of this project is to help decision makers in order to choose proper combination of micro turbines and/or reciprocating engines, with certain rating capacity, as the prime movers of this co-generation system. Some factors that have been considered in the decision making process are prime mover operation in various ambient temperatures, various altitudes and part-load conditions and also operational restrictions such as power to heat ratio, maintenance cost ratio and prime movers plant factor and also economic characteristics such as investment and operating cost functions of prime movers. Then a mixed integer non-linear model has been applied to minimize the equivalent total cost of the system. In order to consider environmental aspects, carbon taxes have been calculated along other costs in total cost function. Model has been optimized for cases where electricity is sellable or not-sellable or where there is absorbing chiller or compressing chiller. A residential case-study has been applied as the input data of model and model has been solved by Dicopt solver in the GAMS software. The most important results of the model is that at operating capacities lower than 50 kw, Micro turbine and in capacities higher than 100 kw, Reciprocating engine is the most favorite prime mover; applying absorbing chiller has more economic benefit in comparison to compressing chiller; also the results of the sensitivity analysis of the model show that the model is sensitive about electricity and gas buying price and electricity and hot water selling price and this sensitivity can affect the optimal selection of prime movers. In general, although this input data reciprocating engine is a more favorite prime mover in the range of capacities up to 1000 kw, but the sensitivity analysis show that the selection of optimal prime mover in this range is very difficult and needs an optimization model
  9. Keywords:
  10. Microturbine ; Optimization ; Cogeneration ; Internal Combustion Engines ; Mixed Integer Nonlinear Programming (MINLP) ; Micro Combined Heat and Power (MCHP)System

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