Modelling, simulation and comparison of phase change material storage based direct and indirect solar organic Rankine cycle systems

Alvi, Jahan Zeb; Feng, Yongqiang; Wang, Qian; Imran, Muhammad; Alvi, Junaid

doi:10.1016/j.applthermaleng.2019.114780

Cited by 45 publications

(17 citation statements)

References 36 publications

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“…The performance of the solar ORCs using storage unit is affected by different factors, and the configuration of the system is one of the most important factors. For instance, Alvi et al (2020) compared the performance of both direct and indirect solar ORCs by applying the same collector, operating fluid, and storage unit. For the considered case study (Islam Abad in Pakistan), their model revealed that the annual system efficiency of the direct solar ORC was 71.96% higher compared to the corresponding value of the indirect solar ORC.…”

Section: Thermal Storage Units In Solar Orcsmentioning

confidence: 99%

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

et al. 2021

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Organic Rankine Cycles (ORCs) are promising approaches for generating power from medium or low temperature heat sources. In this regard, ORCs can be used to indirectly produce power from solar energy. Due to intermittent nature of solar energy, storage unit should be coupled with solar ORCs to improve the output power and operating hours. In this article, studies on solar ORCs integrated with various types of storage units were reviewed; the main findings of such studies were extracted and provided. Based on the findings, several factors such as the temperature and pressure at the inlet of the turbine, as well as the operating condition affect the performance of solar ORCs with thermal storage unit just like the conventional ORCs. In addition, the optimum size of the storage unit in the solar ORCs was found to depend on the operating condition. From the financial perspective, it can be noted that the storage unit affects the corresponding indicators. Moreover, the improvement rate in the ORCs by applying storage units could be affected by the configuration of the system.

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Section: Thermal Storage Units In Solar Orcsmentioning

confidence: 99%

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

et al. 2021

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“…There was a mini-tube inside each tube. The larger diameter tube was filled with PCM, while the working fluid passed through the mini-tube [33]. The outside wall of the heat storage tank was presumed to be insulated.…”

Section: Heat Storage Systemmentioning

confidence: 99%

“…It was concluded that the application of aluminum fins resulted in a significant decrease in the temperature gradient across the PCM storage tank. Alvi et al [22,33] compared and analyzed a PCM-based DVG and indirect solar ORC systems. It was found that the thermal match between the PCM and the working fluid was much stronger than that between water and PCM.…”

Section: Introductionmentioning

confidence: 99%

Effect of Phase Change Material Storage on the Dynamic Performance of a Direct Vapor Generation Solar Organic Rankine Cycle System

et al. 2020

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Solar energy is a potential source for a thermal power generation system. A direct vapor generation solar organic Rankine cycle system using phase change material storage was analyzed in the present study. The overall system consisted of an arrangement of evacuated flat plate collectors, a phase-change-material-based thermal storage tank, a turbine, a water-cooled condenser, and an organic fluid pump. The MATLAB programming environment was used to develop the thermodynamic model of the whole system. The thermal storage tank was modeled using the finite difference method and the results were validated against experimental work carried out in the past. The hourly weather data of Karachi, Pakistan, was used to carry out the dynamic simulation of the system on a weekly, monthly, and annual basis. The impact of phase change material storage on the enhancement of the overall system performance during the charging and discharging modes was also evaluated. The annual organic Rankine cycle efficiency, system efficiency, and net power output were observed to be 12.16%, 9.38%, and 26.8 kW, respectively. The spring and autumn seasons showed better performance of the phase change material storage system compared to the summer and winter seasons. The rise in working fluid temperature, the fall in phase change material temperature, and the amount of heat stored by the thermal storage were found to be at a maximum in September, while their values became a minimum in February.

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“…Thus, the PCM selection criteria for LTES depends on the purpose of real applications. Regarding the fields of solar energy and industrial waste heat recovery, PCM should have great charging performance [16,17]. The definition of a LTES with excellent performance means the system possesses large heat storage capacity and high charging rate during the charging process.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of thermophysical properties on PCM selection under steady and fluctuating heat sources: A comparative study

Chang

Huang

et al. 2021

Applied Thermal Engineering

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Modelling, simulation and comparison of phase change material storage based direct and indirect solar organic Rankine cycle systems

Cited by 45 publications

References 36 publications

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Effect of Phase Change Material Storage on the Dynamic Performance of a Direct Vapor Generation Solar Organic Rankine Cycle System

Sensitivity analysis of thermophysical properties on PCM selection under steady and fluctuating heat sources: A comparative study

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