Single and multi-objective optimization for the performance enhancement of lead-acid battery cell

2016 ◽  
Vol 40 (14) ◽  
pp. 1966-1978 ◽  
Author(s):  
Hamoon Pourmirzaagha ◽  
Vahid Esfahanian ◽  
Fereidoun Sabetghadam ◽  
Farschad Torabi
Keyword(s):  
Performance Enhancement ◽  
Lead Acid Battery ◽  
Multi Objective Optimization ◽  
Battery Cell ◽  
Multi Objective ◽  
Lead Acid

Aerothermal Optimization of Fully Cooled Turbine Blade Tips

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Valeria Andreoli ◽  
James Braun ◽  
Guillermo Paniagua ◽  
Cis De Maesschalck ◽  
Matthew Bloxham ◽  
...  
Keyword(s):  
Turbine Blade ◽  
Heat Load ◽  
Performance Enhancement ◽  
Navier Stokes ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Hexahedral Elements ◽  
Sst Model ◽  
Blade Tip ◽  
Novel Strategy

Optimal turbine blade tip designs have the potential to enhance aerodynamic performance while reducing the thermal loads on one of the most vulnerable parts of the gas turbine. This paper describes a novel strategy to perform a multi-objective optimization of the tip geometry of a cooled turbine blade. The parameterization strategy generates arbitrary rim shapes around the coolant holes on the blade tip. The tip geometry performance is assessed using steady Reynolds-averaged Navier–Stokes simulations with the k–ω shear stress transport (SST) model for the turbulence closure. The fluid domain is discretized with hexahedral elements, and the entire optimization is performed using identical mesh characteristics in all simulations. This is done to ensure an adequate comparison among all investigated designs. Isothermal walls were imposed at engine-representative levels to compute the convective heat flux for each case. The optimization objectives were a reduction in heat load and an increase in turbine row efficiency. The multi-objective optimization is performed using a differential evolution strategy. Improvements were achieved in both the aerodynamic efficiency and heat load reduction, relative to a conventional squealer tip arrangement. Furthermore, this work demonstrates that the inclusion of over-tip coolant flows impacts the over-tip flow field, and that the rim–coolant interaction can be used to create a synergistic performance enhancement.

Aerothermal Optimization of Fully Cooled Turbine Blade Tips

2018 ◽  
Author(s):  
V. Andreoli ◽  
J. Braun ◽  
G. Paniagua ◽  
C. De Maesschalck ◽  
M. Bloxham ◽  
...  
Keyword(s):  
Turbine Blade ◽  
Heat Load ◽  
Performance Enhancement ◽  
Navier Stokes ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Hexahedral Elements ◽  
Sst Model ◽  
Blade Tip ◽  
Novel Strategy

Optimal turbine blade tip designs have the potential to enhance aerodynamic performance while reducing the thermal loads on one of the most vulnerable parts of the gas turbine. This paper describes a novel strategy to perform a multi-objective optimization of the tip geometry of a cooled turbine blade. The parameterization strategy generates arbitrary rim shapes around the coolant holes on the blade tip. The tip geometry performance is assessed using steady Reynolds-Averaged Navier-Stokes simulations with the k-ω SST model for the turbulence closure. The fluid domain is discretized with hexahedral elements, and the entire optimization is performed using identical mesh characteristics in all simulations. This is done to ensure an adequate comparison among all investigated designs. Isothermal walls were imposed at engine-representative levels to compute the convective heat flux for each case. The optimization objectives were a reduction in heat load and an increase in turbine row efficiency. The multi-objective optimization is performed using a differential evolution strategy. Improvements were achieved in both the aerodynamic efficiency and heat load reduction, relative to a conventional squealer tip arrangement. Furthermore, this work demonstrates that the inclusion of over-tip coolant flows impacts the over-tip flow field, and that the rim-coolant interaction can be used to create a synergistic performance enhancement.

In Situ and Ex Situ Measurements of Lead Acid Battery Cell by the PEIS

2019 ◽  
Vol 95 (1) ◽  
pp. 219-225
Author(s):  
Petr Křivík ◽  
Sebastian Vaculík ◽  
Petr Bača ◽  
Jiří Kazelle
Keyword(s):  
Ex Situ ◽  
Lead Acid Battery ◽  
Battery Cell ◽  
Lead Acid

Performance enhancement and multi-objective optimization of a solar-driven setup with storage process using an innovative modification

2020 ◽  
Vol 32 ◽  
pp. 101956
Author(s):  
Yan Cao ◽  
Abdeliazim Mustafa Mohamed ◽  
Mahidzal Dahari ◽  
Mostafa Delpisheh ◽  
Maghsoud Abdollahi Haghghi
Keyword(s):  
Performance Enhancement ◽  
Multi Objective Optimization ◽  
Storage Process ◽  
Multi Objective

Influence of Temperature on Impedance Changes of Lead-Acid Battery Cell

2020 ◽  
Vol 99 (1) ◽  
pp. 105-115
Author(s):  
Petr Křivík ◽  
Petr Baca ◽  
Jiri Kazelle
Keyword(s):  
Lead Acid Battery ◽  
Battery Cell ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Lead Acid

scholarly journals Performance enhancement of a compressive thermoelastic cooling system using multi-objective optimization and novel designs

2015 ◽  
Vol 57 ◽  
pp. 62-76 ◽  
Author(s):  
Suxin Qian ◽  
Abdullah Alabdulkarem ◽  
Jiazhen Ling ◽  
Jan Muehlbauer ◽  
Yunho Hwang ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Cooling System ◽  
Multi Objective Optimization ◽  
Multi Objective
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