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Experimental Study and Modeling of an Organic Rankine Cycle (Orc) Using Low-Temperature Systems

Mirnia Kolaee, Mohammad | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52695 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Shafii, Mohammad Behshad; Hajilouy Benisi, Ali
  7. Abstract:
  8. Increasing fossil fuel consumption has led to serious problems in energy supply and environmental issues such as global warming, air pollution, ozone depletion, and security issues. A strategy to improve energy consumption requires recycling wasted energy and preventing it from being released into the environment. A wide range of available heat sources such as heat dissipation in the transportation industry, solar heat, biomass and geothermal have low-temperature, which contain large amounts of energy but they do not have enough temperature to make them economically viable and cost-effective. Several applied technologies have been proposed to utilize these resources, among which the organic Rankine cycle is widely regarded as one with the highest potential for commercial deployment at various scales. In this project, firstly, the thermodynamic modeling of the organic Rankine cycle with different working fluids was performed and the most appropriate model for generating power from such fluids was calculated. This model is well established based on the principles of analytical modeling. Then an organic Rankine cycle with R134a working fluid was made and tested. Temperature and pressure data of various points of the cycle, flow rate and turbine specification of the experiments were recorded and analyzed in several experiments. The results in the pressure ratio produced 956 watts of power at a rotational speed of 21890 rpm from a power source of 115 ° C, which is 3.91% different from the modeling results
  9. Keywords:
  10. Organic Rankine Cycle (ORC) ; Working Fluid ; Thermodynamic Modeling ; Design and Construction ; Expander ; Heat Waste Sources

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