Parametric study of efficient small-scale axial and radial turbines for solar powered Brayton cycle application

2016 ◽  
Vol 128 ◽  
pp. 343-360 ◽  
Author(s):  
Ahmed M. Daabo ◽  
Ayad Al Jubori ◽  
Saad Mahmoud ◽  
Raya K. Al-Dadah
Keyword(s):  
Parametric Study ◽  
Small Scale ◽  
Brayton Cycle ◽  
Solar Powered ◽  
Radial Turbines

scholarly journals Numerical analysis of small scale axial and radial turbines for solar powered Brayton cycle application

2017 ◽  
Vol 120 ◽  
pp. 672-693 ◽  
Author(s):  
Ahmed M. Daabo ◽  
Saad Mahmoud ◽  
Raya K. Al-Dadah ◽  
Ayad M. Al Jubori ◽  
Ali Bhar Ennil
Keyword(s):  
Numerical Analysis ◽  
Small Scale ◽  
Brayton Cycle ◽  
Solar Powered ◽  
Radial Turbines

Structural Analysis of Small Scale Radial Turbine for Solar Powered Brayton Cycle Application

2018 ◽  
Author(s):  
Ahmed Mahmood Daabo ◽  
Saad Mahmoud ◽  
Raya K. Al-Dadah
Keyword(s):  
Rotational Speed ◽  
High Efficiency ◽  
Fluid Dynamic ◽  
Small Scale ◽  
Brayton Cycle ◽  
High Rotational Speed ◽  
Radial Turbine ◽  
Solar Powered ◽  
Maximum Increment ◽  
Cfd Optimization

Developing small scale turbines pauses challenges in terms of increased stresses due to high rotational speed leading to increase in component thicknesses and turbine overall weight. Therefore this study assesses both; the structural and aerodynamic performance of a Small Scale Radial Turbine SSRT by integrating finite-element methods FEM and Computational Fluid Dynamic CFD. Using Vista preliminary design model in ANSYS and detailed 3D CFD optimization, SSRT with 1–5 kW power for solar powered Brayton cycle was developed with high efficiency of 89.2%. Then both; the turbine’s hub and blades were structurally analysed under various loading conditions to investigate the effect of various rotational speeds and blade shapes on the stress distribution and deformation of the blades. The results of the current study showed that a maximum increment of 65% stress and 57% deformation was noticed when reaching the maximum studied rotational speed at inlet air temperature of 450 K.

Parametric study of the small scale linear Fresnel reflector

2018 ◽  
Vol 116 ◽  
pp. 64-74 ◽  
Author(s):  
A. Barbón ◽  
N. Barbón ◽  
L. Bayón ◽  
J.A. Sánchez-Rodríguez
Keyword(s):  
Parametric Study ◽  
Small Scale ◽  
Linear Fresnel Reflector

Design and Performance of Small Scale Solar Powered Water Desalination Systems, Utilizing Reverse Osmosis

2000 ◽  
Vol 122 (4) ◽  
pp. 170-175 ◽  
Author(s):  
K. B. Franc¸a ◽  
H. M. Laborde ◽  
H. Neff
Keyword(s):  
High Pressure ◽  
Energy Consumption ◽  
Feed Solution ◽  
Water Desalination ◽  
Small Scale ◽  
Feed Water ◽  
High Pressure Pump ◽  
And Performance ◽  
Solar Powered ◽  
Power Needs

A small scale solar powered desalination system has been designed, analyzed, and optimized with regard to power needs and energy consumption. Both quantities scale linearly with the concentration of the total dissolved salt concentration (TDS) in the feed solution. The desalination of brackish water at a TDS value of 3,000 ppm requires an energy of approximately 1.5 kWh/m3. For seawater at a TDS value of 34,000 ppm, this value increases to 9.5 kWh/m3. The selected type of membrane, the system design, and, in particular, the efficiency of the high pressure pump crucially affect energy consumption. The desalination cost also has been estimated for a small scale system that linearly scale with the TDS value of the feed water. [S0199-6231(00)00104-0]

Numerical Study of a Micro Gas Turbine Integrated With a Supercritical CO2 Brayton Cycle Turbine

2018 ◽  
Author(s):  
Fabrizio Reale ◽  
Vincenzo Iannotta ◽  
Raffaele Tuccillo
Keyword(s):  
Gas Turbines ◽  
Waste Heat ◽  
Numerical Study ◽  
Organic Rankine Cycle ◽  
Energy Systems ◽  
Rankine Cycle ◽  
Energy System ◽  
Small Scale ◽  
Brayton Cycle ◽  
Integrated Energy System

The primary need of reducing pollutant and greenhouse gas emissions has led to new energy scenarios. The interest of research community is mainly focused on the development of energy systems based on renewable resources and energy storage systems and smart energy grids. In the latter case small scale energy systems can become of interest as nodes of distributed energy systems. In this context micro gas turbines (MGT) can play a key role thanks to their flexibility and a strategy to increase their overall efficiency is to integrate gas turbines with a bottoming cycle. In this paper the authors analyze the possibility to integrate a MGT with a super critical CO2 Brayton cycle turbine (sCO2 GT) as a bottoming cycle (BC). A 0D thermodynamic analysis is used to highlight opportunities and critical aspects also by a comparison with another integrated energy system in which the waste heat recovery (WHR) is obtained by the adoption of an organic Rankine cycle (ORC). While ORC is widely used in case of middle and low temperature of the heat source, s-CO2 BC is a new method in this field of application. One of the aim of the analysis is to verify if this choice can be comparable with ORC for this operative range, with a medium-low value of exhaust gases and very small power values. The studied MGT is a Turbec T100P.

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