FIRST AND SECOND LAW EVALUATION OF COMBINED BRAYTON-ORGANIC RANKINE POWER CYCLE
| Autor: | Muhammed M. Aksoy, Onder Kaska, Onur Bor, Nehir Tokgöz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Organic Rankine cycle Exergy Waste management 0211 other engineering and technologies Mühendislik Energy Engineering and Power Technology 02 engineering and technology Building and Construction Brayton Cycle Organic Rankine Cycle Bottoming Cycle Pinch Point Temperature Waste Heat Energy and Exergy Analysis Brayton cycle Waste heat recovery unit 020303 mechanical engineering & transports Engineering 0203 mechanical engineering Waste heat Environmental science Working fluid 021108 energy Power cycle Degree Rankine |
| Zdroj: | Volume: 6, Issue: 4 577-591 Journal of Thermal Engineering |
| ISSN: | 2148-7847 |
| Popis: | In the present work, we have conducted thermodynamic analysis of an organic Rankine cycle (ORC) using waste heat from intercooler and regenerator in Brayton cycle with intercooling, reheating, and regeneration (BCIRR). First of all, the first law analysis is used in this combined cycle. Several outputs are revealed in this study such as the cycle efficiencies in Brayton cycle which is dependent on turbine inlet temperature, intercooler pressure ratios, and pinch point temperature difference. For all cycles, produced net power is increased because of increasing turbine inlet temperature. Since heat input to the cycles takes place at high temperatures, the produced net power is increased because of increasing turbine inlet temperature for all cycles. The thermal efficiency of combined cycle is higher about 11.7% than thermal efficiency of Brayton cycle alone. Moreover, the net power produced by ORC has contributed nearly 28650 kW. The percentage losses of exergy for pump, turbine, condenser, preheater I, preheater II, and evaporator are 0.33%, 33%, 22%, 23%, 6%, and16% respectively. The differences of pinch point temperature on ORC net power and efficiencies of ORC are investigated. In addition, exergy efficiencies of components with respect to intercooling pressure ratio and evaporator effectiveness is presented. Exergy destructions are calculated for all the components in ORC. |
| Databáze: | OpenAIRE |
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