Performance parameter evaluation, materials selection, solar radiation with energy losses, energy storage and turbine design procedure for a pilot scale solar updraft tower

2017 ◽  
Vol 150 ◽  
pp. 451-462 ◽  
Author(s):  
Ramakrishna Balijepalli ◽  
V.P. Chandramohan ◽  
K. Kirankumar
Keyword(s):  
Energy Storage ◽  
Solar Radiation ◽  
Design Procedure ◽  
Pilot Scale ◽  
Performance Parameter ◽  
Energy Losses ◽  
Materials Selection ◽  
Parameter Evaluation ◽  
Turbine Design ◽  
Solar Updraft Tower

scholarly journals Sensitivity of Supersonic ORC Turbine Injector Designs to Fluctuating Operating Conditions

2015 ◽  
Author(s):  
Elio A. Bufi ◽  
Paola Cinnella ◽  
Xavier Merle
Keyword(s):  
Method Of Characteristics ◽  
Organic Rankine Cycle ◽  
Design Procedure ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Real Gas ◽  
Real Gas Effects ◽  
Nozzle Shape ◽  
Turbine Design ◽  
The Impact

The design of an efficient organic rankine cycle (ORC) expander needs to take properly into account strong real gas effects that may occur in given ranges of operating conditions, which can also be highly variable. In this work, we first design ORC turbine geometries by means of a fast 2-D design procedure based on the method of characteristics (MOC) for supersonic nozzles characterized by strong real gas effects. Thanks to a geometric post-processing procedure, the resulting nozzle shape is then adapted to generate an axial ORC blade vane geometry. Subsequently, the impact of uncertain operating conditions on turbine design is investigated by coupling the MOC algorithm with a Probabilistic Collocation Method (PCM) algorithm. Besides, the injector geometry generated at nominal operating conditions is simulated by means of an in-house CFD solver. The code is coupled to the PCM algorithm and a performance sensitivity analysis, in terms of adiabatic efficiency and power output, to variations of the operating conditions is carried out.

Application of Mechanical Energy Storage in Micro-Fluid Turbine Design

2014 ◽  
Vol 472 ◽  
pp. 374-378
Author(s):  
Ying Yuan Tian ◽  
Xu Jun Wang ◽  
Gong Xiang Ji
Keyword(s):  
Energy Storage ◽  
Mechanical Energy ◽  
Storage System ◽  
Deep Ocean ◽  
Energy Storage System ◽  
Ocean Current ◽  
Low Speed ◽  
Speed Flow ◽  
Marine Current ◽  
Turbine Design

A micro-fluid turbine with mechanical energy storage system is designed and successfully tested in laboratory. As energy supplement for deep ocean installations, this patent design solved the problem of difficult generating electricity in ultra-low speed flow. The conventional marine current turbine can hardly get start in flows with velocity lower than 0.5m/s, whereas the marine current speed is seldom higher than one knot in deep sea. By adding a mechanical energy storage system, the rotor of the micro-fluid turbine first captures the fluid kinetic energy from the ultra-low speed flow, and then the energy transferred to the mechanical energy storage system, in which a plane scroll spring is used to store the limited energy and drive the generator automatically when it has enough potential energy. Simulation and laboratory test show that this method has potential for power generating in low density ocean current environment.

Ultraviolet-Visible Light-Thermal Conversion Organic Solid-Liquid Phase-Change Materials

2013 ◽  
Vol 679 ◽  
pp. 29-34
Author(s):  
Yun Ming Wang ◽  
Bing Tao Tang ◽  
Shu Fen Zhang
Keyword(s):  
Energy Storage ◽  
Liquid Phase ◽  
Solar Radiation ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Thermal Conversion ◽  
Organic Solid ◽  
Solid Liquid

UV-vis light-driven organic solid-liquid phase change materials exhibited excellent performances of UV-vis light-harvesting, UV-vis light-thermal conversion and thermal energy storage, which is promoted by UV absorbing dye as an effective ‘‘photon capture and molecular heater’’ for direct and efficient use of solar radiation.

scholarly journals Optimization with excess electricity management of a PV, energy storage and diesel generator hybrid system using HOMER Pro software

2020 ◽  
Vol 9 (3) ◽  
pp. 267
Author(s):  
Aysar Yasin ◽  
Mohammed Alsayed
Keyword(s):  
Energy Storage ◽  
Solar Radiation ◽  
Hybrid System ◽  
Energy Demand ◽  
Average Power ◽  
Average Energy ◽  
Diesel Generator ◽  
Pumping System ◽  
Water Pumping ◽  
The Impact

In this research, a standalone microgrid power system is proposed to electrify a small agricultural community in Palestinian territories. The load includes residential load and water pumping load. The community comprises about 30 households with some service buildings in addition to the water pumping system. The average load energy demand is 300kWh/day and the average power demand is 12.5kW, in the same context, the average energy demand for water pumping is 49kWh/day. The region has abundant solar radiation potential with a daily average of 5.4 kWh/m<sup>2</sup>. The optimum design was achieved using the HOMER Pro software. It took into consideration real incident solar radiation data, electrical demand profile for the community and water pumping system and market cost of all equipment. The optimization results showed that the best hybrid system among all feasible configurations is a PV system with an energy storage system combined with a diesel generator. The net present cost of the system is USD636,150 and the cost of energy (COE) produced is USD0.438/kWh. Sensitivity analysis is considered to study the impact of variations in PV cost, diesel fuel price, and maximum annual capacity shortages (MACS), the results showed that MACS has no effects. Energy management procedure is followed to reduce the excess electricity from 10.6% to 6.24% which in turn reduces the COE from 0.438 to USD 0.416/kWh.

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