International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
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THERMODYNAMIC ANALYSIS OF SOLAR POWERED COMBINED SUPERCRITICAL CARBON DIOXIDE CYCLE AND ORGANIC RANKINE CYCLE. Miss. Reshma R Bangar1, Prof. Ajay Kashikar 2, Prof. Rajesh Kumar 3 1Student, Department of Mechanical Engineering, Alamuri Ratnamala institute of engineering and technology,
Shahpur, Thane Maharashtra, India
2 Assistant Professor, Department of Mechanical Engineering, Lokmanya Tilak College of Engineering,
Koparkhairne, Navi-Mumbai, Maharashtra, India 3 Assistant Professor, Department of Mechanical Engineering, Alamuri Ratnamala institute of engineering and
technology, Shahpur, Thane Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Thermodynamic analysis of the combined
energy sources, solar energy is low-cost, noise-free, and abundantly freely available in nature (Tiwari, Sherwani, and Kumar 2018). Previous studies have shown that, among other renewable energy resources, solar energy for cooling, heating, and power generation is the most appropriate energy resource (Abdelghani-Idrissi et al. 2018). Solar collectors are used for the use of solar energy. The heat transfer fluid takes heat from solar thermal energy inside the collectors. In addition, this heat transfer fluid is used for driving different types of thermodynamic cycles (Desai and Bandyopadhyay 2016). Parabolic trough solar collector (PTSC) is used for collecting solar heat to heat high or medium temperature fluids. Selection of PTSCs is optimum due to acceptable cost and higher efficiency among the other solar collectors (Cabrera et al. 2013). In addition, there are numerous studies based on the performance of the PTSC. It is used for driving the various power generation cycles such as the steam Rankine cycle (Al-Sulaiman 2013), the Kalina cycle (Ashouri et al. 2015), the organic Rankine cycle (Desai and Bandyopadhyay 2016), the cogeneration systems and the hybrid conventional-solar power cycle. Some solar-driven systems could not have become so popular due to nonclean energy systems (Bellos and Tzivanidis 2016). Supercritical CO2 (SCO2) is the state of CO2 above its critical point (304.13 K, 7.38 MPa). The SCO2 cycle uses SCO2 as the working fluid. SCO2 cycle is one cycle that can be used to harvest heat from different heat sources such as geothermal energy, natural gas, coal power, solar thermal energy, exhaust gas waste heat (Ahn et al. 2015). Some configurations of the SCO2 cycles for the use of heat from different thermal energy resources are simple supercritical cycle, single-heated cascade cycle, recompression, pre-compression, partial heating, dual cascade cycle, single-heated cascade cycle with intercooler, dual-heated cascade cycle with intercooler, dual-heated and triple-heat flow split cycles, dualexpansion cycles with intercooler. Among these SCO2 cycles, detailed analysis of certain cycles such as (simple
partial heating supercritical CO2 (PSCO2) cycle and ORC is presented in this study. In engineering equation solver software, a computer program was created for parametric analysis of the model. Basic PSCO2 cycle was then compared with existing previous studies that were conducted without partial heating. It was concluded that the PSCO2 system was 1 to 3% thermally more efficient than the non-partial heating cycle. Furthermore, it was found that ORC’s use in existing PSCO2 cycle improved thermal efficiency by 4.47% of the basic PSCO2 cycle. The effects of the parabolic trough collectors (PTSCs) on the combined cycle performance were further examined. Without taking into account the performance of the PTSCs, the highest exergy and thermal efficiency of the combined cycle using R1233zd(E) was achieved by 83.26 and 48.61%, respectively at 950 W/m2 of solar irradiation while taking into account the performance of PTSCs, the combined cycle achieved exergy efficiency by 42.31% because PTSCs alone accounted for 62.93% of the total exergy destruction. One of the other conclusions obtained from the results was that the highest solar incidence angle was responsible for poor system performance. Key Words: Thermodynamic analysis; parabolic trough solar collector; partial heating supercritical CO2 cycle; ORC
1. INTRODUCTION Nowadays, there is a high demand for energy due to the increasing population and the development of industries (Yagli 2020). This leads to an increase in the generation of more power. But conventional energy resources are steadily declining. That is why dependence on renewable energy resources is simultaneously increasing. The renewable energy resources currently being used for the generation of electricity is geothermal energy, wind energy, solar energy, etc. Compared to other renewable
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