Increasing thermal efficiency of Rankine cycles by using refrigeration cycles: A theoretical analysis
| Autor: | François Mathieu-Potvin, Joachim-André Raymond Sarr |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Organic Rankine cycle
Thermal efficiency Rankine cycle Engineering Isentropic process Renewable Energy Sustainability and the Environment business.industry 020209 energy Heat pump and refrigeration cycle Energy Engineering and Power Technology Refrigeration Mechanical engineering 02 engineering and technology 7. Clean energy law.invention Fuel Technology 020401 chemical engineering Nuclear Energy and Engineering law Thermodynamic cycle 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Process engineering business Degree Rankine |
| Zdroj: | Energy Conversion and Management. 121:358-379 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2016.05.037 |
| Popis: | In this paper, three different modifications of the basic Rankine thermodynamic cycle are proposed. The objective is to increase the thermal efficiency of power systems based on Rankine cycles. The three new systems are named “Rankine-1SCR”, “Rankine-2SCR”, and “Rankine-3SCR” cycles, and they consist of linking a refrigeration cycle to the basic Rankine cycle. The idea is to use the refrigeration cycle to create a low temperature heat sink for the Rankine cycle. These three new power plant configurations are modeled and optimized with numerical tools, and then they are compared with the basic Rankine cycle. The objective function is the thermal efficiency of the systems (i.e., net power output (kW) divided by heat rate (kW) entering the system), and the design variables are the operating temperatures within the systems. Among the 84 × 84 (i.e., 7056) possible combinations of working and cooling fluids investigated in this paper, it is shown that: (i) the Rankine-1SCR system is advantageous for 1338 different fluid combinations, (ii) the Rankine-2SCR system is advantageous for 772 different fluid combinations, and (iii) the Rankine-3SCR system is advantageous for 768 different fluid combinations. |
| Databáze: | OpenAIRE |
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