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| Content Provider | MDPI |
|---|---|
| Author | Bellos, Evangelos Tzivanidis, Christos |
| Abstract | The objective of this work was to optimize and to evaluate a solar-driven trigeneration system which operates with nanofluid-based parabolic trough collectors. The trigeneration system includes an organic Rankine cycle (ORC) and an absorption heat pump operating with LiBr-H2O which is powered by the rejected heat of the ORC. Toluene, n-octane, Octamethyltrisiloxane (MDM) and cyclohexane are the examined working fluids in the ORC. The use of CuO and Al2O3 nanoparticles in the Syltherm 800 (base fluid) is investigated in the solar field loop. The analysis is performed with Engineering Equation Solver (EES) under steady state conditions in order to give the emphasis in the exergetic optimization of the system. Except for the different working fluid investigation, the system is optimized by examining three basic operating parameters in all the cases. The pressure in the turbine inlet, the temperature in the ORC condenser and the nanofluid concentration are the optimization variables. According to the final results, the combination of toluene in the ORC with the CuO nanofluid is the optimum choice. The global maximum exergetic efficiency is 24.66% with pressure ratio is equal to 0.7605, heat rejection temperature 113.7 °C and CuO concentration 4.35%. |
| File Size | 11017216 |
| File Format | |
| e-ISSN | 19961073 |
| DOI | 10.3390/en10070848 |
| Journal | Energies |
| Issue Number | 7 |
| Volume Number | 10 |
| Language | English |
| Publisher Date | 2017-06-25 |
| Access Restriction | Open |
| Subject Keyword | solar energy trigeneration organic Rankine cycle (ORC) absorption heat pump heat transformer nanofluids parabolic trough collector (PTC) optimization $LiBr-H_{2}O$ exergy |
| Content Type | Text |
| Resource Type | Article |
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