SEASONAl FLUCTUATIONS OF FLOW CHARACTERISTICS AND ENERGY POTENTIAL IN TSUGARU STRAIT TOWARD TIDE AND OCEAN CURRENT POWER GENERATION

The European Union has set targets for renewable energy utilization. Poland is a member of the EU, and its authorities support an increase in renewable energy use. The background of this study is based on the role of renewable energy sources in improving energy security and mitigation of climate change. Agricultural waste is of a significant role in bioenergy. However, there is a lack of integrated methodology for the measurement of its potential. The possibility of developing an integrated evaluation methodology for renewable energy potential and its spatial distribution was assumed as the hypothesis. The novelty of this study is the integration of two renewable energy sources: crop residues and animal husbandry waste (for biogas). To determine agricultural waste energy potential, we took into account straw requirements for stock-raising and soil conservation. The total energy potential of agricultural waste was estimated at 279.94 PJ. It can cover up to 15% of national power generation. The spatial distribution of the agricultural residue energy potential was examined. This information can be used to predict appropriate locations for biomass-based power generation facilities. The potential reduction in carbon dioxide emissions ranges from 25.7 to 33.5 Mt per year.

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Optimizing renewable-based energy supply options for power generation in Ethiopia

PLoS ONE ◽

10.1371/journal.pone.0262595 ◽

2022 ◽

Vol 17 (1) ◽

pp. e0262595

Author(s):

Megersa Tesfaye Boke ◽

Semu Ayalew Moges ◽

Zeleke Agide Dejen

Keyword(s):

Power Generation ◽

Renewable Energy ◽

Energy Supply ◽

Electricity Consumption ◽

Energy Potential ◽

Middle Income ◽

Energy Mix ◽

Reform Agenda ◽

Income Status ◽

Middle Status

Ethiopia unveiled homegrown economic reform agenda aimed to achieve a lower-middle status by 2030 and sustain its economic growth to achieve medium-middle and higher-middle status by 2040 and 2050 respectively. In this study, we evaluated the optimal renewable energy mix for power generation and associated investment costs for the country to progressively achieve upper-middle-income countries by 2050. Two economic scenarios: business as usual and Ethiopia’s homegrown reform agenda scenario were considered. The study used an Open Source energy Modeling System. The model results suggest: if projected power demand increases as anticipated in the homegrown reform agenda scenario, Ethiopia requires to expand the installed power capacity to 31.22GW, 112.45GW and 334.27GW to cover the current unmet and achieve lower, medium and higher middle-income status by 2030, 2040 and 2050 respectively. The Ethiopian energy mix continues to be dominated by hydropower and starts gradually shifting to solar and wind energy development towards 2050 as a least-cost energy supply option. The results also indicate Ethiopia needs to invest about 70 billion US$ on power plant investments for the period 2021–2030 to achieve the lower-middle-income electricity per capita consumption target by 2030 and staggering cumulative investment in the order of 750 billion US$ from 2031 to 2050 inclusive to achieve upper-middle-income electricity consumption rates by 2050. Ethiopia has enough renewable energy potential to achieve its economic target. Investment and financial sourcing remain a priority challenge. The findings could be useful in supporting decision-making concerning socio-economic development and investment pathways in the country.

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System of Comprehensive Energy-Efficient Utilization of Associated Petroleum Gas with Reduced Carbon Footprint in the Field Conditions

Energies ◽

10.3390/en13184921 ◽

2020 ◽

Vol 13 (18) ◽

pp. 4921 ◽

Cited By ~ 1

Author(s):

Valentin Morenov ◽

Ekaterina Leusheva ◽

George Buslaev ◽

Ove T. Gudmestad

Keyword(s):

Power Generation ◽

Carbon Footprint ◽

High Efficiency ◽

Energy System ◽

Gas Analysis ◽

Energy Potential ◽

Associated Petroleum Gas ◽

Power Load ◽

Generation Cycle ◽

Power Generation Cycle

This paper considers the issue of associated petroleum gas utilization during hydrocarbon production in remote petroleum fields. Due to the depletion of conventional oil and gas deposits around the globe, production shifts to hard-to-recover resources, such as heavy and high-viscosity oil that requires a greater amount of energy to be recovered. At the same time, large quantities of associated petroleum gas are extracted along with the oil. The gas can be utilized as a fuel for power generation. However, even the application of combined power modes (combined heat and power and combined cooling heat and power) cannot guarantee full utilization of the associated petroleum gas. Analysis of the electrical and heat loads’ graphs of several oil fields revealed that the generated thermal energy could not always be fully used. To improve the efficiency of the fuel’s energy potential conversion, an energy system with a binary power generation cycle was developed, consisting of two power installations—a main gas microturbine and an auxiliary steam turbine unit designed to power the technological objects in accordance with the enterprise’s power load charts. To provide for the most complete utilization of associated petroleum gas, a gas-to-liquid system is introduced, which converts the rest of the gas into synthetic liquid hydrocarbons that are used at the field. Processing of gas into various products also lowers the carbon footprint of the petroleum production. Application of an energy system with a binary power generation cycle makes it possible to achieve an electrical efficiency up to 55%, at the same time maintaining high efficiency of consumers’ energy supply during the year. The utilization of the associated petroleum gas in the developed system can reach 100%.

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Potential of the Lower Daugava for Siting Hydrokinetic Turbines / Daugavas Lejteces Enerģētiskais Potenciāls Hidrokinētisko Turbīnu Izmantošanai

Latvian Journal of Physics and Technical Sciences ◽

10.2478/lpts-2013-0007 ◽

2013 ◽

Vol 50 (2) ◽

pp. 3-14 ◽

Cited By ~ 2

Author(s):

A. Kalnach ◽

J. Kalnach ◽

A. Mutule ◽

U. Persis

Keyword(s):

Water Flow ◽

Flow Rate ◽

Electricity Generation ◽

Flow Characteristics ◽

Water Density ◽

Energy Potential ◽

Hydrokinetic Turbines ◽

Hydrokinetic Turbine

The article outlines the requirements and criteria for the hydrokinetic turbine site and determines the water flow characteristics based on which the energy potential of such a turbine is calculated for lower reaches of the River Daugava. The changes in the energy potential caused by fluctuations in the water density and flow rate are evaluated. Two investigated spans (total > 22 km) are split into ten smaller subregions with similar characteristics and comparatively evaluated regarding their suitability for electricity generation by hydrokinetic turbines.

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