Domestic Electricity Generation Research Articles

An optimization model for integrated water allocation in the parallel system of Segawe regulating weir and Wonorejo multipurpose dam, Tulungagung, East Java

The parallel system of Segawe Regulating Weir and Wonorejo Multipurpose Dam is one of waterworks in the Brantas river basin. Segawe Regulating Weir was built to divert its local inflow into Wonorejo Reservoir as well as to release certain amounts of water downstream needed for ecosystem maintenance and irrigation. On the other hand, Wonorejo Multipurpose Dam was built to serve for ecosystem maintenance, irrigation, domestic water supply and electricity generation. This research discusses an optimization model that integrates the purposes of the two river structures based on the release-demand ratio and by considering the priority constraints. The optimization model was used to derive the operating pattern under requirement for the initial condition of Wonorejo Reservoir in the first period must be the same as the final condition in the last period. The results show that the reliabilities of Segawe Regulating Weir and Wonorejo Multipurpose Dam for all the purposes can reach 100% in dry, normal and wet years, where the potential energies are 20.33, 22.45 and 24.16 GWh, respectively. However, the results come with some trade-offs in the release capability of each river structure due to the integration concept.

Protection of small natural springs with drinking water in Republic of Serbia and Republic of Srpska

A spring is a point of exit at which groundwater from an aquifer flows out on top of Earth's crust (pedosphere) and becomes surface water. It is a component of the hydrosphere. Springs have long been important for humans as a source of fresh water. Springs have been used for a variety of human needs - including drinking water, domestic water supply, irrigation, mills, navigation, and electricity generation. Modern uses include recreational activities such as fishing, swimming, and floating; therapy; water for livestock; fish hatcheries; and supply for bottled mineral water or bottled spring water. Springs have taken on a kind of mythic quality in that some people believe, falsely, that springs are always healthy sources of drinking water. They may or may not be. On the territory of the Republic of Serbia and the Republic of Srpska, there are numerous occurrences of small springs known only to the local population who use them for certain purposes. The chapter provides an overview of the territorial distribution as well as the basic established physical and chemical characteristics of several natural springs in selected parts of the territory (Fruška gora, City of Belgrade, Central Serbia, northern part of Kosovo, Srebrenica, Čajniče, Doboj, Kozarska Dubica and Kiseljak).

Performance evaluation of three constructed wetland-microbial fuel cell systems: wastewater treatment efficiency and electricity generation potential.

Constructed wetlands (CWs) have proven to be effective and environmentally friendly for removing pollutants, while microbial fuel cells (MFCs) offer the potential for electricity generation. Thus, this study evaluated the performance of three CW-MFC systems (zigzag, single-column, and triple-column continuous) for domestic wastewater treatment and electricity generation. Results showed that parallel connection of CW-MFCs significantly improved power generation compared to series connection. Additionally, using three copper wires to connect carbon fiber felt electrodes demonstrated superior pollutant capture capabilities compared to a single copper wire. During the 14-day testing period, the single-column system achieved the highest power density of 5.55 mW m-2, followed closely by the triple-column continuous system at 4.77 mW m-2. In contrast, the zigzag system exhibited a lower power density of 2.49 mW m-2. Interestingly, the implementation of facultative anaerobic conditions in the anode, along with the application of a plastic bag cover, facilitated the maintenance of anaerobic conditions in both the single-column and triple-column continuous systems. This resulted in increased power density and reduced internal resistance. In contrast, the zigzag system, with its larger surface area, aeration, and circulation, exhibited higher internal resistance and lower current dissipation. Despite its inferior electricity generation performance, the zigzag system demonstrated higher efficiency removal of chemical oxygen demand (COD), nitrate (NO3-), and phosphate (PO43-) than the single-column system. This can be attributed to the extended contact time, resulting in enhanced pollutant removal. Overall, the multi-column continuous system shows promise as a viable approach for simultaneous domestic wastewater treatment and electricity production, offering potential benefits for sustainable wastewater management.

Optimal pathways for the decarbonisation of the transport sector: Trade-offs between battery and hydrogen technologies using a whole energy system perspective

Several countries have revised their targets in recent years to reach net-zero CO2 emissions across all sectors by 2050, and the transport sector is responsible for a significant share of these emissions. This study compares possible pathways to decarbonise the transport sector including passenger cars, light commercial vehicles and heavy commercial vehicles. To do so, we explore 125 scenarios by varying the share of battery and hydrogen-based fuel cell electric vehicles in each of the three categories above independently. We further model the decarbonisation of the industrial hydrogen demand using electrolysers with hydrogen storage. To explore the potential role of electric and hydrogen transport, as well as their trade-offs, we use GRIMSEL, an open-source sector coupling energy system model of Switzerland which includes the residential, commercial, industrial and transport sectors with four energy carriers, namely electricity, heat, hot water and hydrogen. The total costs are minimised from a social planner perspective. We find that the decarbonisation of the transport sector could lead, on average, to a 12% increase in costs by 2050 and 1.3 MtCO2/year which represents a 90% CO2 emissions reduction for the whole sector, compared to fossil-based transport. Second, the transport energy self-sufficiency (i.e. the share of domestic electricity generation in final transport demand) may reach up to 50% for the scenarios with the largest share of battery electric vehicles, mainly due to a smaller energy demand than with hydrogen vehicles. Third, more than three quarters of the industrial hydrogen production is met by local photovoltaic electricity coupled with battery at minimum costs, i.e. green hydrogen. Finally, the use of hydrogen as an energy carrier to store electricity over a long period is not cost-optimal.

Investigation of Domestic Wastewater Treatment and Electricity Generation Using A Two Chambered Microbial Fuel Cell with Composite Anode Electrode

Microbial fuel cell is a bioelectrochemical system that generate electricity with the oxidation of organic substrates by exoelectrogenic microorganisms. It can be said that the studies on microbial fuel cells (MFCs) are generally aimed to increase the amount of energy produced. In this study, domestic wastewater treatment was investigated by using a two-chamber microbial fuel cell. Ankara Tatlar Wastewater Treatment Plant influent water was used as substrate. In order to reduce the diffusional resistance by reducing the distance between the anode and cathode electrode, the cathode chamber was placed in the middle of the anode chamber. Anode and cathode chambers separated by Nafion 117 membrane. In addition, an anode consisting of a stainless-steel mesh and a graphite supported catalyst has been developed to increase the electricity generation potential. During the experiment, the maximum voltage and the maximum power density values were obtained as 595 mV and 205.867 mW/m2 respectively. COD value is a criteria which indicates the waste treatment ability of the systems. For this experiment COD values of the wastewaster were measured both the beginning and the end of the experiment as 451 mg/L O2 and 361 mg/L O2. These results proved that the developed electrode structure is at a comparable level with the values reported in the literature for two-chamber MFC studies.

Climatic and different human influences on annual and seasonal streamflow with considering the soil water storage change in the middle reaches of the Yellow River basin, China

Recent climate change and more intensive human activities have induced significant changes in streamflow along the middle reaches of the Yellow River basin (MRYRB), which has attracted considerable attention from the scientific community. However, most previous studies have focused on changes in annual streamflow by examining data from a small number of hydrological stations and the role of the various human activities remains unclear. Here we used an extended Budyko-based framework that considered changes in soil water storage (ΔS) to determine the contributions of changes in streamflow, both at the annual and seasonal scale. These analysis were conducted on 40 catchments and three sections (Toudaoguai–Longmen, TDG–LM; Longmen-Huayuankou, LM–HYK; and Toudaoguai–Huayuankou, TDG–HYK) in the MRYRB from 1971 to 2015. Results showed that streamflow at most catchments and sections declined dramatically after years of abrupt change detected by the Pettitt test, with decreases occurring at a faster rate during flood seasons (42.9%) than during non-flood seasons (31.8%). Although human behaviors were often the main cause of streamflow reductions at the annual and seasonal scales, the effects of ΔS became more important at increasingly finer scales. Indeed, they were of equal or greater importance than human impacts in some catchments, with corresponding relative contributions up to 48%. The effects of human activities may possibly have been overestimated or underestimated by 1–16% in three sections when the impact of ΔS was not considered. Further analysis indicated that human water use – particularly the rapid increase in water withdrawals for domestic purposes, electricity generation, and manufacturing – was the primary factor among human activities that affected streamflow reduction in the LM–HYK and TDG–HYK sections at different timescales, comprising 60–90% of all impacts. By contrast, the effects of water use and other human factors were almost equal in the TDG–LM section. Among the other human factors, vegetation restoration played a more critical role in the TDG–LM section, whereas the construction of check-dams was more important in the LM–HYK section. These findings of our study can enhance the understanding of hydrological changes in response to environmental factors.

PREDICTION OF CARBON DIOXIDE EMISSION FROM ELECTRICITY GENERATION IN ASEAN

The Coal-Fired Power Plants with low-emissions plants in the power sector can avoid nearly 800 million tonnes CO2 by 2030. The number of populations, Gross Domestic Product (GDP), electricity generation, NDC, and relevant energy policies influenced the prediction of Carbon Dioxide (CO2) emission from electricity generation. Aim: The objective is to analyze trends of CO2 growth related to electricity generation activities from countries in ASEAN with an emphasis on identifying the factors that influence it and evaluating the effectiveness of existing decarbonization policies in AMS and developing suitable strategies to reduce future CO2 emissions. Methodology and Result: Predicting CO2 emissions is conducted using three approaches by considering the newest NDC and energy policies, conducted by descriptive and quantitative analysis based on secondary data of (1) general information on ASEAN Member States (AMS), (2) information on power plants, (3) information on fuel use in electricity generation, and (4) decarbonization policies in AMS. Results indicated that the availability of potential energy sources (coal/oil/gas/RE) influences the dominant energy used in AMS Prediction of CO2e emission in the 2020 to 2040 period identified Vietnam as one of the highest CO2e emitters (380,1 Mt CO2e) in the electricity sector by 2030. Conclusion, significance and impact study: AMS needs to make a more aggressive energy policy to reduce CO2 level significantly, achieving the 2050 net zero transition targets. Ultimately, the shifting from coal-fired electricity plants to other fuel sources with a lower emission factor proves to be the most significant factor towards emission reduction.

Domestic renewable electricity generation vs electricity imports: Meeting India’s long-run electricity consumption

In the era of increased globalization electricity has become a key element for achieving high economic growth. Renewable electricity, owing to its inputs, serves as an engine for environmentally sustainable economic growth when compared to its counterpart. However, in countries where the existing technology does not permit adequate electricity production, import of electricity becomes vital to meet the ever-increasing electricity consumption requirements. The main objective of this study is to examine the causal relationships between renewable electricity production, electricity imports and electricity consumption in India. Data analysis involves the use of Vector Error Correction model and Wald-Granger causality test. The long-run equations suggest that greenhouse gas emissions and natural resource rents positively affect the renewable electricity production. Increasing electricity consumption results in increased electricity imports, whereas the same consumption is insignificant in fueling the renewable production. The statistical analysis concludes with model diagnostics. The obtained result calls for extended focus towards looking for ways to develop the renewable electricity production system from the side of both producers and consumers, given the increasing emission levels. Imports if any are recommended to a minimum to preserve the electricity autarky.

Production of Sustainable Renewable Energy from Biodegradable Wastes

Renewable energy from ISWM system plays a significant role in clean energy harvesting. SW containing 50% - 60% of methane (CH4) gas, with 40% - 50% carbon dioxide (CO2). CH4 being a valuable resources for clean energy production has 18 - 22 MJm-3 of energy content. Nigeria depends on finite means of energy sources, and are generally non-renewable in nature. Hence, this poise a greater danger to environmental sustainability. Therefore, this research aimed at providing an effective and sustainable dependability from the use of non-renewable to renewable energy sources, leading a shift from oil resource based energy to biodegradable energy & W-t-E resources, all emanating from MSW. Quantitative and qualitative approaches have been adopted in-line with this research work, to effectively evaluate and to extract 100% of CH4 gas (natural gas) available as LFG from SW to be used in domestic, industrial and power electricity generation plants. Technically this is achievable through passive or active gas management system, for an extensive extraction peak productivity period of 1 - 20 yrs. of available waste stream table 3, figure 4 and 7. Similarly an increased waste generated in 2020 from that of 2015, led to the extraction peak production period of 1 – 30 yrs. of continuous energy harvesting table 4, figure 5 and 7 respectively. Hence, there is the need for various stakeholders to invest in effective ISWM to boosting raw material sources for RRR.

Electricity Generation Forecast of Shanghai Municipal Solid Waste Based on Bidirectional Long Short-Term Memory Model

The accurate prediction of Municipal Solid Waste (MSW) electricity generation is very important for the fine management of a city. This paper selects Shanghai as the research object, through the construction of a Bidirectional Long Short-Term Memory (BiLSTM) model, and chooses six influencing factors of MSW generation as the input indicators, to realize the effective prediction of MSW generation. Then, this study obtains the MSW electricity generation capacity in Shanghai by using the aforementioned prediction results and the calculation formula of theMSW electricity generation. The experimental results show that, firstly, the mean absolute error (MAE), mean absolute percentage error (MAPE), and root mean square error (RMSE) values of the BiLSTM model are 42.31, 7.390, and 63.32. Second, it is estimated that by 2025, the maximum and minimum production of MSW in Shanghai will be 17.35 million tons and 8.82 million tons under the three scenarios. Third, it is predicted that in 2025, the maximum and minimum electricity generation of Shanghai MSW under the three scenarios will be 512.752 GWh/y and 260.668 GWh/y. Finally, this paper can be used as a scientific information source for environmental sustainability decision-making for domestic MSW electricity generation technology.

Public transportation and energy utilisation during Covid-19 pandemic in Nigeria

New public transport planning requirements are developed as many countries start to navigate their return to normality after the COVID-19 lockdown. This study combines key developments regarding public transportation and effect of the lockdown on energy utilization during the first and second wave of COVID-19 pandemic in Nigeria. Data were sourced from the National Bureau of Statistic and Nigerian National Petroleum Company (NNPC) on distribution of Fuel and gas energies which thematically analyzed the impact of COVID-19 on transportation systems in Lagos Nigeria. The decline in vehicular density on roads which leads to reduced fuel consumption coupled with infection risk in public transportation in the so-called post-lockdown phase. Domestic gas consumption and electricity generation were slightly affected during this period. Changes in travel demands; Financial sustainability; Increased cost of transportation and Loss of revenue were revealed as significant impact of the pandemic. Lastly, this study identifies maintenance of key principles in mitigating the spreading of the virus, probable energy utilization, policy recommendations and future management of resources that are most inclined to the development objectives of developing nations in the time of COVID-19 and beyond.

An assessment for the viability of recovering heat from a smoke extract system

Over the course of industrial manufacturing, additional heat within the extract systems is usually released into the atmosphere and its intrinsic energy is wasted. This paper investigated a cold abatement smoke extract system for a fire testing wall furnace to determine the viability in recovering heat from the hot smoke. Three scenarios were investigated: 1) the extract system was closed and only 300°C smoke was present; 2) the system took in ambient air around the furnace and heat recovery occurred at 80°C in smoky air; 3) the smoke had been removed from the air and the temperature was 60°C. It was found that there was a significant build-up of soot on Scenarios 1 & 2 with a build-up rate of 0.25 μm/s which totalled 2.7 mm of soot after a three-hour test. The soot had a low heat transfer rate and therefore acted as an insulator on the heat exchanger which reduced the efficiency significantly of it over time. Due to this loss in efficiency, it was more viable to recover heat in Scenario 3 at 60°C in clean air than it was to recover heat at 300°C or 80°C in smoky air. The results show that having clean air was more important than a higher temperature when it came from recovering heat from a cold abatement system for a fire testing furnace. This paper contributes to reveal the possibilities of harnessing the “waste heat” for use in other applications in the vicinity of the manufacturing processes, such as heating water within a central heating plant, domestic hot water or electricity generation, or re-cycled within the industrial plant itself.

An Innovative Solar-Biomass Energy System to Increase the Share of Renewables in Office Buildings

Increasing the energy efficiency of residential and non-residential buildings is a crucial point towards the development of the sustainable cities of the future. To reach such a goal, the commonly employed intervention measures (for instance, on facades and glass) are not sufficient and efforts in reaching a fully renewable energy generation are mandatory. In this context, this paper discusses the applicability of a system with solar and biomass as the main energy sources in different climates for heating, cooling, domestic hot water and electricity generation in office buildings. The energy system includes solar thermal collectors with thermoelectric generators, a biomass boiler, a reversible heat pump/organic Rankine cycle and an adsorption chiller. The results showed that the system can operate with a share of renewables higher than 70% for all energy needs, with up to 80% of the overall energy demand supplied only by solar and biomass sources even in the northern locations.

Simultaneous Domestic Wastewater Treatment and Electricity Generation in Microbial Fuel Cell with Mn(IV) Oxide Addition

AbstractCompared to traditional domestic wastewater treatment methods, microbial fuel cells (MFCs) with Manganese(IV) (Mn(IV)) oxide addition were established to promote the degradation efficiency of organics in domestic wastewater and generate electricity simultaneously. Activated sludge consists of various electricigen and Mn(IV) oxide acts as an excellent electron acceptor. Results showed that the MFC with Mn(IV) oxide addition obtained higher total organic carbon and chemical oxygen demand removal efficiencies in domestic wastewater than without Mn(IV) oxide addition and in an open circuit system, and produced a maximum output power density of 0.946 W m−3 with a corresponding maximum voltage density of 0.915 V L−1. Cyclic Voltammograms (CVs) indicated that the current density of the MFC with Mn(IV) oxide addition reached 2.21 mA cm−2 at the peak separation of 0.26 V, whereas the current density of the MFC only was up to 1.15 mA cm−2 at 0.443 V. Linear Sweep Voltammetry (LSV) showed the half‐wave potential and limiting current density of the MFC with Mn(IV) oxide addition as 71 mV and 4.24 mA cm2 respectively, which were higher than corresponding values (36 mV and 3.65 mA cm−2) of the MFC. Tafel curves illustrated the MFC with Mn(IV) oxide addition showed a lower anodic Tafel slope of 6.14±0.393 V−1, confirming the MFC with Mn(IV) oxide addition enabled faster electron‐transfer kinetics as compared to the MFC.

Material selection for rotor blade of vertical axis wind turbine

Scarcity of electricity created pressure to think on non-conventional energy sources. In this research work, a Savonius rotor Vertical wind turbine used and adapted for household and domestic electricity generation. Investigation on various materials of blades was carried out. The innovative turbine technology collects wind energy and converts it into electricity, which in turn to charge heavy duty battery. For the design & analysis PRO-E, ANSYS software was used. Structure steel is found suitable for such application.

Life-Cycle Carbon Emissions and Energy Return on Investment for 80% Domestic Renewable Electricity with Battery Storage in California (U.S.A.)

This paper presents a detailed life-cycle assessment of the greenhouse gas emissions, cumulative demand for total and non-renewable primary energy, and energy return on investment (EROI) for the domestic electricity grid mix in the U.S. state of California, using hourly historical data for 2018, and future projections of increased solar photovoltaic (PV) installed capacity with lithium-ion battery energy storage, so as to achieve 80% net renewable electricity generation in 2030, while ensuring the hourly matching of the supply and demand profiles at all times. Specifically—in line with California’s plans that aim to increase the renewable energy share into the electric grid—in this study, PV installed capacity is assumed to reach 43.7 GW in 2030, resulting of 52% of the 2030 domestic electricity generation. In the modelled 2030 scenario, single-cycle gas turbines and nuclear plants are completely phased out, while combined-cycle gas turbine output is reduced by 30% compared to 2018. Results indicate that 25% of renewable electricity ends up being routed into storage, while 2.8% is curtailed. Results also show that such energy transition strategy would be effective at curbing California’s domestic electricity grid mix carbon emissions by 50%, and reducing demand for non-renewable primary energy by 66%, while also achieving a 10% increase in overall EROI (in terms of electricity output per unit of investment).

THE NEXUS OF POPULATION, GDP GROWTH, ELECTRICITY GENERATION, ELECTRICITY CONSUMPTION AND CARBON EMISSIONS OUTPUT IN MALAYSIA

This study aimed to examines the nexus of population, gross domestic product (GDP) growth, electricity generation, electricity consumption, and carbon emissions output using the time series data. This study employed the time series analysis, Pearson correlation, and regressions analysis to identify the pattern, relationship among variables and determine the significant predictors contributing carbon emissions in Malaysia. The results shown a growing trend in GDP, population, electricity generation, consumption, and emissions output in Malaysia. The correlation analysis presented a positive linear relationship among GDP, population, electricity generation, electricity consumption, and emissions output. The growing trend in population and GDP has significantly resulted in high rate of electricity generation and consumption that leads to greater carbon emissions in Malaysia. The multiple linear regressions suggest that population plays an important role to influence the carbon emissions in power generation sector from 1970 to 2014. We summarized the aspect of generations, consumption, and emissions productions are highly dependent on human aspects and driven by the inhabitants of the country. According to these findings, it can be concluded that electrical power in Malaysia is human-dependent energy system. Therefore, sustainable energy generation and consumption are crucial as renewable energy is generating zero emissions. A more holistic policy and strategy is required to encourage sustainable resources at the same time reducing carbon emissions towards sustainable energy consumption in Malaysia.Keywords: Electricity generation, consumption, emissions, MalaysiaJEL Classifications: Q41; C39DOI: https://doi.org/10.32479/ijeep.8987

Integrated Scheduling of Hybrid Generation and Demand Response Program for a Building

This paper illustrates a comprehensive model of an energy management system and a novel control algorithm in a building in a grid-connected state. This study attempts to provide an approach including a proposed scheduling algorithm and a hybrid model of electricity generation to reduce the electricity consumption cost and increase the reliability of the grid in summer due to the great demands of electricity for using air condition systems. The model consists of cogeneration of a photovoltaic system and a diesel generator with a battery storage system. The electrical consumption profile of home appliances used in the daytime is modeled. Then an algorithm is introduced to observe and schedule the electrical appliances and charge and discharge the batteries in an optimal way. The results depict that the unified model and proposed control strategy are performed successfully and the peak of electrical demand is eliminated appropriately. The occupants also can benefit financially in grid-connected mode by selling extra domestic electricity generation to the grid over the peak time period.

Long-term economic impacts of energy development scenarios: The role of domestic electricity generation

The development of domestic energy generation is often expected to provide benefits to the economy through, for example, improved energy trade balance and jobs created. However, the economic impacts of energy development scenarios are not limited to the energy sector, and the decision makers must consider the impacts on the entire economy. In this paper, we analyse the full impacts of increased domestic electricity generation in a computable general equilibrium (CGE) framework. Realistic energy development scenarios are modelled using the MESSAGE energy system model and considered to be exogenously described energy pathways that generate responses from the remaining economy. These technically and economically consistent energy scenarios are incorporated into the computable general equilibrium model through the creation of fixed, variable, and investment cost structures for the energy forms considered. Model application in Lithuanian case revealed the interchangeable character of electricity imports and local generation based on a relatively significant share of imported resources. Depending on electricity market conditions, scenarios with higher domestic electricity generation levels might fail to provide substantial economic benefits: although increasing electricity import prices would create preconditions to increase domestic electricity production and turn Lithuania to the net electricity exporter, gross domestic product (GDP) might decrease due to the negative impacts on other economic activities. International cooperation for least-cost clean energy supply might be economically beneficial to energy importing countries and increasing domestic electricity generation should not be set as the ultimate goal.

Dynamic performance analysis of façade-integrated tri-functional photovoltaic/thermal solar collector

Research on building-integrated photovoltaic/thermal (BiPV/T) technology has been conducted for years because the system can provide electric power and thermal energy simultaneously. A façade-integrated tri-functional PV/T collector system is presented and studied in this paper. The collector can work in PV/water-heating mode or PV/air-heating mode. Besides, it can also work in the composite mode that air and water be heated simultaneously. So optimum work mode of the collecor can be chosen for different energy demands. The collector can be combined with the southern wall of building, then it operates as PV-Trombe wall for passive room heating and electricity generation in winter, and for domestic water heating and electricity generation in other seasons. For the different working modes, theoretical research is carried out and dynamic model of the collector and building are developed. Based on the models, the performance of collector and the thermal behavior of the room are investigated under different climates conditions.