Enhanced life cycle modelling of a micro gas turbine fuelled with various fuels for sustainable electricity production

Economic cost is decisive for the development of different power generation. Life cycle cost (LCC) is a useful tool in calculating the cost at all life stages of electricity generation. This study improves the levelized cost of electricity (LCOE) model as the LCC calculation methods from three aspects, including considering the quantification of external cost, expanding the compositions of internal cost, and discounting power generation. The improved LCOE model is applied to three representative kinds of power generation, namely, coal-fired, biomass, and wind power in China, in the base year 2015. The external cost is quantified based on the ReCiPe model and an economic value conversion factor system. Results show that the internal cost of coal-fired, biomass, and wind power are 0.049, 0.098, and 0.081 USD/kWh, separately. With the quantification of external cost, the LCCs of the three are 0.275, 0.249, and 0.081 USD/kWh, respectively. Sensitivity analysis is conducted on the discount rate and five cost factors, namely, the capital cost, raw material cost, operational and maintenance cost (O&M cost), other annual costs, and external costs. The results provide a quantitative reference for decision makings of electricity production and consumption.

Download Full-text

Combined heat/cooling and power generation using hybrid micro gas turbine in a CST plant for a residential off-grid application

10.1063/5.0029285 ◽

2020 ◽

Author(s):

Francesco Rovense ◽

Miguel Ángel Reyes-Belmonte ◽

Manuel Romero ◽

José González-Aguilar

Keyword(s):

Power Generation ◽

Gas Turbine ◽

Micro Gas Turbine ◽

Grid Application

Download Full-text

Are Renewables as Friendly to Humans as to the Environment?: A Social Life Cycle Assessment of Renewable Electricity

Sustainability ◽

10.3390/su11051370 ◽

2019 ◽

Vol 11 (5) ◽

pp. 1370 ◽

Cited By ~ 12

Author(s):

Shutaro Takeda ◽

Alexander Keeley ◽

Shigeki Sakurai ◽

Shunsuke Managi ◽

Catherine Norris

Keyword(s):

Life Cycle Assessment ◽

Supply Chain ◽

Life Cycle ◽

Social Life ◽

Electricity Production ◽

Social Life Cycle Assessment ◽

Solar Photovoltaic ◽

Energy Technologies ◽

Electricity Mix ◽

The Impact

The adoption of renewable energy technologies in developing nations is recognized to have positive environmental impacts; however, what are their effects on the electricity supply chain workers? This article provides a quantitative analysis on this question through a relatively new framework called social life cycle assessment, taking Malaysia as a case example. Impact assessments by the authors show that electricity from renewables has greater adverse impacts on supply chain workers than the conventional electricity mix: Electricity production with biomass requires 127% longer labor hours per unit-electricity under the risk of human rights violations, while the solar photovoltaic requires 95% longer labor hours per unit-electricity. However, our assessment also indicates that renewables have less impacts per dollar-spent. In fact, the impact of solar photovoltaic would be 60% less than the conventional mix when it attains grid parity. The answer of “are renewables as friendly to humans as to the environment?” is “not-yet, but eventually.”

Download Full-text

Modeling and parametric optimization for a solar-powered closed-cycle micro gas turbine for space applications

Journal of Physics Conference Series ◽

10.1088/1742-6596/1745/1/012099 ◽

2021 ◽

Vol 1745 (1) ◽

pp. 012099

Author(s):

A V Thomas Jayachandran ◽

A Y Tkachenko ◽

H H Omar ◽

A Krishnakumar

Keyword(s):

Gas Turbine ◽

Parametric Optimization ◽

Closed Cycle ◽

Space Applications ◽

Micro Gas Turbine ◽

Solar Powered

Download Full-text

Development of Micro Gas Turbine Combustor with a Recirculation Zone Induced by an Upward Swirl

Journal of Environment and Engineering ◽

10.1299/jee.3.204 ◽

2008 ◽

Vol 3 (1) ◽

pp. 204-215

Author(s):

Kousaku YOTORIYAMA ◽

Shunsuke AMANO ◽

Hidetomo FUJIWARA ◽

Tomohiko FURUHATA ◽

Masataka ARAI

Keyword(s):

Gas Turbine ◽

Recirculation Zone ◽

Gas Turbine Combustor ◽

Micro Gas Turbine

Download Full-text

Investigations on the Blade Vibration of a Radial Inflow Micro Gas Turbine Wheel

International Journal of Rotating Machinery ◽

10.1155/2007/29270 ◽

2007 ◽

Vol 2007 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Shijie Guo

Keyword(s):

Gas Turbine ◽

Young’S Modulus ◽

Young's Modulus ◽

Turbine Blades ◽

Pressure Fluctuations ◽

Leading Edge ◽

Coupled Modes ◽

Blade Vibration ◽

Turbine Wheel ◽

Micro Gas Turbine

This paper demonstrates the investigations on the blade vibration of a radial inflow micro gas turbine wheel. Firstly, the dependence of Young's modulus on temperature was measured since it is a major concern in structure analysis. It is demonstrated that Young's modulus depends on temperature greatly and the dependence should be considered in vibration analysis, but the temperature gradient from the leading edge to the trailing edge of a blade can be ignored by applying the mean temperature. Secondly, turbine blades suffer many excitations during operation, such as pressure fluctuations (unsteady aerodynamic forces), torque fluctuations, and so forth. Meanwhile, they have many kinds of vibration modes, typical ones being blade-hub (disk) coupled modes and blade-shaft (torsional, longitudinal) coupled modes. Model experiments and FEM analysis were conducted to study the coupled vibrations and to identify the modes which are more likely to be excited. The results show that torque fluctuations and uniform pressure fluctuations are more likely to excite resonance of blade-shaft (torsional, longitudinal) coupled modes. Impact excitations and propagating pressure fluctuations are more likely to excite blade-hub (disk) coupled modes.

Download Full-text