scholarly journals Renewable Electricity Production and Sustainability of the National and Regional Power Systems of Kazakhstan

2020 ◽  
Vol 2 (1) ◽  
pp. 35-53
Author(s):  
Nazym Temirgaliyeva ◽  
Madina Junussova
Keyword(s):  
Power Systems ◽  
Electricity Production ◽  
Regional Power ◽  
Renewable Electricity

scholarly journals Insights from Past Trends in Exergy Efficiency and Carbon Intensity of Electricity: Portugal, 1900–2014

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 534
Author(s):  
Laura Felício ◽  
Sofia T. Henriques ◽  
André Serrenho ◽  
Tiago Domingos ◽  
Tânia Sousa
Keyword(s):  
World War I ◽  
High Efficiency ◽  
Electricity Production ◽  
Transport Sector ◽  
Carbon Intensity ◽  
Renewable Electricity ◽  
World War ◽  
Residential Sector ◽  
Electricity Use ◽  
Low Efficiency

We use the societal exergy analysis to identify periods and factors controlling efficiency dilution and carbon deepening of electricity in Portugal from 1900 to 2014. Besides estimating the carbon intensity of electricity production, we propose a new indicator, the carbon intensity of electricity use, which quantifies CO2/kWh of electricity derived useful exergy. Results show final to useful efficiency dilution until World War I (50% to 30%) due to a decrease in share of the high-efficiency transport sector and from mid-1940s to 1960 and mid-1990s onwards (58% to 47% and 47% to 40%) due to an increase in share of the low efficiency commercial and residential sector. Decarbonization from 1900 to mid-1960s, with carbon intensities of electricity production and use dropping respectively from 12.8 to 0.2 and from 33.6 to 0.4 kg CO2/kWh due to an increase in thermoelectricity efficiencies and an increase in share of hydro. Then, a period of carbon deepening until 1990 with carbon intensities tripling due to a shift in shares from hydro to thermoelectricity and more recently a period of decarbonization with carbon intensities decreasing to 0.35 and 0.9 kg CO2/kWh, due to the increase in renewable electricity despite a dilution in final to useful efficiency.

Modeling Energy Portfolio Scoring

2015 ◽  
Vol 2 (4) ◽  
pp. 1-22 ◽  
Author(s):  
Rafael Diaz ◽  
Joshua G. Behr ◽  
Rafael Landaeta ◽  
Francesco Longo ◽  
Letizia Nicoletti
Keyword(s):  
Renewable Energy ◽  
Production Method ◽  
Economic Benefits ◽  
Dynamics Simulation ◽  
Electricity Production ◽  
Simulation Framework ◽  
Renewable Electricity ◽  
Hampton Roads ◽  
Support Policy ◽  
The Impact

U.S. regions are expected to follow the national trend towards investment in renewable energy as part of their electricity portfolio. The progress of energy portfolios that typically involves traditional methods, such as centralized nuclear and coal-fired generation, and towards cleaner- and renewable-source generation will impact economic growth and public health. Renewable electricity production must strike a balance among cost, reliability, and compatibility. The economic and health benefits obtained from developing an efficient energy portfolio make renewable energy alternatives an important consideration for regions endowed with natural resources. A portfolio mix of production method that considers the economic benefits while limiting adverse health and environmental impacts is attractive. This research proposes a System Dynamics simulation framework to support policy-making efforts in assessing the impact of energy portfolios. The authors demonstrate the utility of the framework by means of analyzing data that pertain to the U.S. Hampton Roads - Peninsula Region.

scholarly journals Investigation of the Multi-Point Injection of Green Hydrogen from Curtailed Renewable Power into a Gas Network

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6047 ◽  
Author(s):  
Ali Ekhtiari ◽  
Damian Flynn ◽  
Eoin Syron
Keyword(s):  
Green Energy ◽  
Active Management ◽  
Electricity Production ◽  
Renewable Electricity ◽  
Gas Network ◽  
Network Location ◽  
Network Parameters ◽  
Renewable Power ◽  
The Impact

Renewable electricity can be converted into hydrogen via electrolysis also known as power-to-H2 (P2H), which, when injected in the gas network pipelines provides a potential solution for the storage and transport of this green energy. Because of the variable renewable electricity production, the electricity end-user’s demand for “power when required”, distribution, and transmission power grid constrains the availability of renewable energy for P2H can be difficult to predict. The evaluation of any potential P2H investment while taking into account this consideration, should also examine the effects of incorporating the produced green hydrogen in the gas network. Parameters, including pipeline pressure drop, flowrate, velocity, and, most importantly, composition and calorific content, are crucial for gas network management. A simplified representation of the Irish gas transmission network is created and used as a case study to investigate the impact on gas network operation, of hydrogen generated from curtailed wind power. The variability in wind speed and gas network demands that occur over a 24 h period and with network location are all incorporated into a case study to determine how the inclusion of green hydrogen will affect gas network parameters. This work demonstrates that when using only curtailed renewable electricity during a period with excess renewable power generation, despite using multiple injection points, significant variation in gas quality can occur in the gas network. Hydrogen concentrations of up to 15.8% occur, which exceed the recommended permitted limits for the blending of hydrogen in a natural gas network. These results highlight the importance of modelling both the gas and electricity systems when investigating any potential P2H installation. It is concluded that, for gas networks that decarbonise through the inclusion of blended hydrogen, active management of gas quality is required for all but the smallest of installations.

Renewable Electricity Production Effect on the Energy Balance of Latvia

2016 ◽  
Author(s):  
P. Shipkovs ◽  
Galina Kashkarova ◽  
Kristina Lebedeva ◽  
Janis Shipkovs ◽  
Lana Migla
Keyword(s):  
Energy Balance ◽  
Electricity Production ◽  
Renewable Electricity ◽  
Production Effect

West Africa power pool makes slow progress

2015 ◽  
Keyword(s):  
West Africa ◽  
Private Investment ◽  
Regional Power ◽  
Renewable Electricity ◽  
Content Type ◽  
Power Pool ◽  
Energy Fund ◽  
Slow Progress ◽  
Renewable Electricity Generation ◽  
Power Shortages

Subject Regional power outlook for West Africa. Significance The West African Power Pool (WAPP), institutionalised in 2001, aimed to create a regional power market large enough to attract private investment. Among its 14 member states, WAPP boasts considerable energy resources. Progress has been slow, with chronic power shortages reflecting decades of under-investment in national sectors. Impacts With the exception of hydroelectricity, renewable energy will likely augment not replace traditional power, eg, coal and gas-based. However, 'off grid' renewable electricity generation and transmission systems may be increasingly used for powering remote locations. Facilities such the Sustainable Energy Fund for Africa will need to fund many renewables projects initially for them to be viable.

Determination of the Minimal Error of Power Consumption Forecast by Regression Analysis

2014 ◽  
Vol 1008-1009 ◽  
pp. 823-826 ◽  
Author(s):  
Alexander Tavlintsev ◽  
Maria Shorikova
Keyword(s):  
Regression Analysis ◽  
Power Consumption ◽  
Power Systems ◽  
Mathematical Models ◽  
Regular Component ◽  
Regional Power ◽  
Minimal Error ◽  
A Value

A procedure of estimation of the non-regular component of a power consumption schedule is described in this paper. A value of the non-regular component enables to evaluate the minimal error of daily-ahead power consumption forecast based on regression mathematical models. Evaluating calculations are given by the example of 10 regional power systems of Russia.

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