Micro Gas Turbine Small-Scale Effects in Range Extended Electric Vehicles

2021 ◽  
pp. 1-18
Author(s):  
Adeel Javed ◽  
Hassan Abdullah Khalid ◽  
Syed Umer bin Arif ◽  
Mohammad Imran ◽  
Ahmed Rezk ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Electric Vehicle ◽  
Gas Turbines ◽  
Scale Effects ◽  
Small Scale ◽  
Micro Gas Turbine ◽  
Range Extender ◽  
Charging Time ◽  
Driving Range ◽  
Battery Bank

Abstract Application of a range extender in an electric vehicle can reduce the battery bank size and extend the driving range on need basis. A micro gas turbine offers high power density, fuel flexibility, a reliable thermal efficiency (with recuperation) and less raw exhaust gaseous emissions compared to an internal combustion engine. However, micro gas turbines also incur low component performances due to small-scale effects related to high viscous losses, heat transfer between hot and cold sections, and manufacturing and assembly constraints compared to their larger counterparts. In this paper, the micro gas turbine thermodynamic cycle has been designed in Gas Turbine Simulation Program (GSP) and evaluated in terms of the small-scale effects simultaneously with the battery bank energy and charging time analysis. The key objective is to demonstrate the effectiveness of a micro gas turbine in saving weight of a range-extended electric vehicle while understanding the impact of small-scale effects on the battery bank energy and charging time. Results indicate that a relatively smaller 22 kWh battery bank can be utilized with prospects of cost savings together with a 47 kW micro gas turbine range extender to achieve an average driving range of 100 km and a charging time of 30 min for the baseline electric vehicle. Furthermore, the compressor and turbine isentropic efficiencies are found to have a significant impact on the overall battery bank performance.

Experimental and numerical investigation on micro gas turbine as a range extender for electric vehicle

2020 ◽  
Vol 173 ◽  
pp. 115236 ◽  
Author(s):  
Fenzhu Ji ◽  
Xiangbo Zhang ◽  
Farong Du ◽  
Shuiting Ding ◽  
Yunhai Zhao ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Gas Turbine ◽  
Electric Vehicle ◽  
Micro Gas Turbine ◽  
Range Extender

Micro Gas-Turbine Design for Small-Scale Hybrid Solar Power Plants

2013 ◽  
Vol 135 (11) ◽  
Author(s):  
Lukas Aichmayer ◽  
James Spelling ◽  
Björn Laumert ◽  
Torsten Fransson
Keyword(s):  
Pressure Drop ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Small Scale ◽  
Receiver Design ◽  
Low Carbon ◽  
Micro Gas Turbine ◽  
Solar Power Plants ◽  
Electricity Costs

Hybrid solar micro gas-turbines are a promising technology for supplying controllable low-carbon electricity in off-grid regions. A thermoeconomic model of three different hybrid micro gas-turbine power plant layouts has been developed, allowing their environmental and economic performance to be analyzed. In terms of receiver design, it was shown that the pressure drop is a key criterion. However, for recuperated layouts, the combined pressure drop of the recuperator and receiver is more important. In terms of both electricity costs and carbon emissions, the internally-fired recuperated micro gas-turbine was shown to be the most promising solution of the three configurations evaluated. Compared to competing diesel generators, the electricity costs from hybrid solar units are between 10% and 43% lower, while specific CO2 emissions are reduced by 20–35%.

scholarly journals Diagnostics-Oriented Modelling of Micro Gas Turbines for Fleet Monitoring and Maintenance Optimization

Processes ◽  
2018 ◽  
Vol 6 (11) ◽  
pp. 216 ◽  
Author(s):  
Moksadur Rahman ◽  
Valentina Zaccaria ◽  
Xin Zhao ◽  
Konstantinos Kyprianidis
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Performance Monitoring ◽  
High Reliability ◽  
Small Scale ◽  
Power Generators ◽  
Micro Gas Turbine ◽  
Commercial Off The Shelf ◽  
And Performance ◽  
The Cost

The market for the small-scale micro gas turbine is expected to grow rapidly in the coming years. Especially, utilization of commercial off-the-shelf components is rapidly reducing the cost of ownership and maintenance, which is paving the way for vast adoption of such units. However, to meet the high-reliability requirements of power generators, there is an acute need of a real-time monitoring system that will be able to detect faults and performance degradation, and thus allow preventive maintenance of these units to decrease downtime. In this paper, a micro gas turbine based combined heat and power system is modelled and used for development of physics-based diagnostic approaches. Different diagnostic schemes for performance monitoring of micro gas turbines are investigated.

scholarly journals AMBIENT TEMPERATURE IMPACT ON MICRO GAS TURBINES: EXPERIMENTAL CHARACTERIZATION

2018 ◽  
Vol 20 ◽  
pp. 78-85 ◽  
Author(s):  
Iacopo Rossi ◽  
Alberto Traverso
Keyword(s):  
Ambient Temperature ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Engine Performance ◽  
Combined Cycle ◽  
Active Management ◽  
Small Scale ◽  
Inlet Temperature ◽  
Large Power ◽  
Micro Gas Turbine

In the panorama of gas turbines for energy production, a great relevance is given to performance impact of the ambient conditions. Under the influence of ambient temperature, humidity and other factors, the engine performance is subject to consistent variations. This is true for large power plants as well as small engines. In Combined Cycle configuration, variation in performance are mitigated by the HRSG and the bottoming steam cycle. In a small scale system, such as a micro gas turbine, the influence on the electric and thermal power productions is strong as well, and is not mitigated by a bottoming cycle. This work focuses on the Turbec T100 micro gas turbine and its performance through a series of operations with different ambient temperatures. The goal is to characterize the engine performance deriving simple correlations for the influence of ambient temperature on performance, at different electrical loads. The newly obtained experimental data are compared with previous performance curves on a modified machine, to capture the differences due to hardware degradation in time. An active management of the compressor inlet temperature may be developed in the future, basing on the analysis reported here.

Micro Gas-Turbine Design for Small-Scale Hybrid Solar Power Plants

2013 ◽  
Author(s):  
Lukas Aichmayer ◽  
James Spelling ◽  
Björn Laumert ◽  
Torsten Fransson
Keyword(s):  
Pressure Drop ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Small Scale ◽  
Receiver Design ◽  
Low Carbon ◽  
Micro Gas Turbine ◽  
Solar Power Plants ◽  
Electricity Costs

Hybrid solar micro gas-turbines are a promising technology for supplying controllable low-carbon electricity in off-grid regions. A thermoeconomic model of three different hybrid micro gas-turbine power plant layouts has been developed, allowing their environmental and economic performance to be analyzed. In terms of receiver design, it was shown that the pressure drop is a key criterion. However, for recuperated layouts the combined pressure drop of the recuperator and receiver is more important. The internally-fired recuperated micro gas-turbine was shown to be the most promising solution of the three configurations evaluated, in terms of both electricity costs and carbon emissions. Compared to competing diesel generators, the electricity costs from hybrid solar units are between 10% and 43% lower, while specific CO2 emissions are reduced by 20–35%.

Solar Desalination Based on Micro Gas Turbines Driven by Parabolic Dish Collectors

2019 ◽  
Author(s):  
David Sánchez ◽  
Miguel Rollán ◽  
Lourdes García-Rodríguez ◽  
G. S. Martínez
Keyword(s):  
Gas Turbine ◽  
Reverse Osmosis ◽  
Gas Turbines ◽  
Waste Heat ◽  
Distillation Unit ◽  
Design Parameters ◽  
Small Scale ◽  
Micro Gas Turbine ◽  
The Cost ◽  
The Impact

Abstract This paper presents the preliminary design and techno-economic assessment of an innovative solar system for the simultaneous production of water and electricity at small scale, based on the combination of a solar micro gas turbine and a bottoming desalination unit. The proposed layout is such that the former system converts solar energy into electricity and rejects heat that can be used to drive a thermal desalination plant. A design model is developed in order to select the main design parameters for two different desalination technologies, phase change and membrane desalination, in order to better exploit the available electricity and waste heat from the turbine. In addition to the usual design parameters of the mGT, the impact of the size of the collector is also assessed and, for the desalination technologies, a tailored multi-effect distillation unit is analysed through the selection of the corresponding design parameters. A reverse osmosis desalination system is also designed in parallel, based on commercial software currently used by the water industry. The results show that the electricity produced by the solar micro gas turbine can be used to drive a Reverse Osmosis system effectively whereas the exhaust gases could drive a distillation unit. This would decrease the stack temperature of the plant, increasing the overall energy efficiency of the system. Nevertheless, the better thermodynamic performance of this fully integrated system does not translate into a more economical production of water. Indeed, the cost of water turns out lower when coupling the solar microturbine and Reverse Osmosis units only (between 3 and 3.5 €/m3), whilst making further use the available waste heat in a Multi Effect Distillation system rises the cost of water by 15%.

scholarly journals Design and Numerical Analysis of a Micro Gas Turbine Combustion Chamber

2020 ◽  
Vol 10 (6) ◽  
pp. 6422-6426
Author(s):  
A. C. Mangra
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Transport Model ◽  
Droplet Diameter ◽  
Central Area ◽  
Numerical Results ◽  
Cfd Modeling ◽  
Small Scale ◽  
Micro Gas Turbine

The interest in micro gas turbines has been steadily increasing. As a result, attention has been focused on obtaining optimal configurations for micro gas turbines depending on the applications in which they are used. This paper presents the CFD modeling results regarding an annular type combustion chamber, part of an 800N micro gas turbine, predestined to equip a small scale multifunctional airplane. Two configurations have been taken into consideration and 3D RANS numerical simulations have been conducted with the use of the commercial software ANSYS CFX. The liquid fuel droplets were modeled by the particle transport model, which tracks the particles in a Lagrangian way. An initial fuel droplet diameter of 500µm has been imposed. The numerical results obtained are encouraging. The flame was developed in the central area of the fire tube, its walls thus not being subjected to high temperatures. Also, the maximum temperatures were obtained in the primary zone of the fire tube. The temperature then decreased in the fire tube's secondary zone and dilution zone. The numerical results will be validated by conducting combustion tests on a testing rig which will be developed inside the institute's Combustion Chamber Laboratory.

Experimental and Analytical Analysis of Aero-Derivative Micro Gas Turbine Heat Transfer and Performance

2019 ◽  
Author(s):  
Aki Grönman ◽  
Petri Sallinen ◽  
Juha Honkatukia ◽  
Jari Backman ◽  
Antti Uusitalo ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Internal Heat ◽  
Small Scale ◽  
Micro Gas Turbine ◽  
Overall Performance ◽  
Flow Configurations ◽  
Gas Turbine Heat Transfer ◽  
And Performance

Abstract Small-scale gas turbines offer a light weight alternative to engine generators. Despite the many benefits of a micro gas turbine, its efficiency cannot match that of its competitors. This discrepancy is mostly due to Reynolds number losses in turbomachinery but also partly due to internal heat transfer problems, which degrade the performance below what is adiabatically expected. In general, a good understanding about the heat transfer inside the machine is of paramount importance, and innovative engineering solutions are required to improve overall performance. Overall, one of the less exploited areas in the public literature is the effect of the generator cooling approach. Small jet engines can be used as a simple and affordable foundation to produce portable aero derivative micro gas turbines for demonstrating the specific challenges they face but also to study different flow configurations. This study presents combined analytical and experimental analysis of a portable aero derivative micro gas turbine with three main objectives. The first objective is to evaluate the contributions of different heat leakage losses on the overall performance. The second objective is to compare the influence of different generator cooling approaches. And the third objective is to evaluate the effect of different technical modifications. As a result, suggestions are given about the most suitable machine layouts and the importance of several design choices.

scholarly journals Micro Gas Turbine for Combined Heat and Power in Distributed Generation

1998 ◽  
Author(s):  
Johanna Carnö ◽  
Adrin Cavani ◽  
Leif Liinanki
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Speed ◽  
Combined Heat And Power ◽  
Small Scale ◽  
Heat Output ◽  
Micro Gas Turbine ◽  
Fuel Flexibility ◽  
Evaluation Phase ◽  
Demonstration Plant

Micro gas turbine units are becoming popular for on-site combined heat and power production (CHP). CHP units based on gas turbines have several advantages; low emissions, compactness, low maintenance costs and fuel flexibility. The successful development of a small high-speed turbogenerator gives major opportunities to meet the customers’ demands in a deregulated and competitive market. Vattenfall, together with Volvo Aero Turbines and ABB, has actively participated in development of a future concept of micro gas turbines. The first demonstration plant in Northern Europe for small scale heat and power co-generation, a 40 kWe turbogenerator was installed by Vattenfall at Pappersgruppen in Gothenburg, Sweden. A first evaluation phase of the demonstration plant has been performed. The electricity and heat output showed to be 38 kWe and 70 kW respectively at full load. The net plant efficiency was 28.2% and the overall efficiency was 80%, based on the lower heating value. The emissions from the unit were very low due to low emission combustion chamber. The evaluation period will continue during 97/98. The influence of outdoor temperature, degree of loading, as well as the required maintenance and manned operation will be investigated.

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