scholarly journals Aspen Plus simulation of a low capacity organic Rankine cycle heated by solar energy

2022 ◽  
Vol 8 ◽  
pp. 416-421
S.M. Shalaby ◽  
M.A. Gadalla ◽  
A.R. El Sayed ◽  
E.M. Meliha ◽  
H.F. Abosheiasha
Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 829 ◽  
Ruiqi Wang ◽  
Long Jiang ◽  
Zhiwei Ma ◽  
Abigail Gonzalez-Diaz ◽  
Yaodong Wang ◽  

Small-scale organic Rankine cycle (ORC) systems driven by solar energy are compared in this paper, which aims to explore the potential of power generation for domestic utilisation. A solar thermal collector was used as the heat source for a hot water storage tank. Thermal performance was then evaluated in terms of both the conventional ORC and an ORC using thermal driven pump (TDP). It is established that the solar ORC using TDP has a superior performance to the conventional ORC under most working conditions. Results demonstrate that power output of the ORC using TDP ranges from 72 W to 82 W with the increase of evaporating temperature, which shows an improvement of up to 3.3% at a 100 °C evaporating temperature when compared with the power output of the conventional ORC. Energy and exergy efficiencies of the ORC using TDP increase from 11.3% to 12.6% and from 45.8% to 51.3% when the evaporating temperature increases from 75 °C to 100 °C. The efficiency of the ORC using TDP is improved by up to 3.27%. Additionally, the exergy destruction using TDP can be reduced in the evaporator and condenser. The highest exergy efficiency in the evaporator is 96.9%, an improvement of 62% in comparison with that of the conventional ORC, i.e., 59.9%. Thus, the small-scale solar ORC system using TDP is more promising for household application.

2019 ◽  
Vol 235 ◽  
pp. 1465-1482 ◽  
Bahram Ghorbani ◽  
Mehdi Mehrpooya ◽  
Majid Aasadnia ◽  
Malek Shariati Niasar

2014 ◽  
Vol 1070-1072 ◽  
pp. 1808-1811 ◽  
Han Lv ◽  
Wei Ting Jiang ◽  
Qun Zhi Zhu

Organic Rankine cycle is an effective way to recover low-grade heat energy. In order to improve system performance, for low-temperature waste heat of 120°C and R245fa,R600a,R227ea organic working fluid, using Aspen Plus software conducted simulation by changing the evaporation temperature. Results from these analyses show that decreasing the evaporation temperature, increasing thermal and exergy efficiencies, evaporating pressure, at the same time reduce steam consumption rate.

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Bing Hu ◽  
Xianbiao Bu ◽  
Weibin Ma

To develop the organic Rankine-vapor compression ice maker driven by solar energy, a thermodynamic model was developed and the effects of generation temperature, condensation temperature, and working fluid types on the system performance were analyzed. The results show that the cooling power per square meter collector and ice production per square meter collector per day depend largely on generation temperature and condensation temperature and they increase firstly and then decrease with increasing generation temperature. For every working fluid there is an optimal generation temperature at which organic Rankine efficiency achieves the maximum value. The cooling power per square meter collector and ice production per square meter collector per day are, respectively, 126.44 W m−2and 7.61 kg m−2 day−1at the generation temperature of 140°C for working fluid of R245fa, which demonstrates the feasibility of organic Rankine cycle powered vapor compression ice maker.

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