TY - JOUR
T1 - Comparative Analysis of Small-Scale Organic Rankine Cycle Systems for Solar Energy Utilisation
AU - Wang, Ruiqi
AU - Jiang, Long
AU - Ma, Zhiwei
AU - Gonzalez-Diaz, Abigail
AU - Wang, Yaodong
AU - Roskilly, Anthony Paul
N1 - Funding: This research was funded by the National Natural Science Foundation of China under grant number 51606118 and Heat-STRESS project EP/N02155X/1.
Acknowledgments: This research was supported by National Natural Science Foundation of China under contract number 51606118 and Heat-STRESS project EP/N02155X/1 funded by Engineering and Physical Science Research Council of UK
PY - 2019/3
Y1 - 2019/3
N2 - 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
AB - 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
KW - organic Rankine cycle
KW - thermal driven pump
KW - small-scale
KW - energy and exergy efficiency
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85062405835&partnerID=MN8TOARS
U2 - 10.3390/en12050829
DO - 10.3390/en12050829
M3 - Article
VL - 12
JO - Energies
JF - Energies
SN - 1996-1073
IS - 5
M1 - 829
ER -