ABSTRACT This study aims to explore the impacts of the blending, fumigating, and combined fumigating+blending (F + B) methods, compared to the diesel method, on the engine combustion and cyclic variability parameters under five engine loads and speeds. The diesel and blending methods created heterogeneous combustion, while the fumigating and F + B methods created homogeneous+heterogeneous combustion

ABSTRACT In order to improve the cold-start performance of the fuel cell vehicles, a rapid anode heating system is provided to enable the stack to quickly reach its optimal performance at low temperatures. In this study, a three-dimensional element model of plate-fin heat exchanger has been developed and used to study the effect of structural parameters of staggered fins on the hydrogen transport phenomena

ABSTRACT The present paper proposes a spatial model for the purpose of helping Decision Makers (DM) to select a location for Solar Power Plants (SPPs) in the Misrata District, Western Libya. In this regard, the use of the Geographic Information System (GIS), SWARA (Step-wise Weight Assessment Ratio Analysis), and DEMATEL (Decision-Making Trial and Evaluation Laboratory) multi-criteria methods is suggested

ABSTRACT Wind generation fluctuation results in the electricity supply uncertainty of the company in electricity market. And this uncertainty has an important impact on hourly electricity price. In our paper, we use game models to optimize hourly price for different risk appetites’ companies considering the uncertainty. For the risk-neutral company, we solve the optimal electricity price by maximizing

ABSTRACT The current investigation examines the feasibility and design of hybrid renewable energy system (HRES) based on wind turbine, photovoltaic, and fuel cell technologies, coupled to diesel engines system to meet the power demand of an off-grid residential community located at the village of Sidi Daoud in Tunisia. Techno-economic study of HRES is carried out to propose the optimized system that

ABSTRACT The COVID-19 epidemic has caused a severe impact on global financial markets. Considering that solar energy is an important basis for future energy development, it is particularly imperative to study the destructive effect of COVID-19 on solar energy development. This research thus explores the long-run relationship between COVID-19 and solar enterprises’ stock prices in 24 countries from

ABSTRACT The variable refrigerant flow air-conditioning system is an HVAC system that can perform at a high capacity with low consumption thanks to its variable-speed compressor. The paper introduces a TRNSYS model to build a simulation model to calculate the energy performance of an existing variable refrigerant flow system and to build a model that can be used as a reference when a VRF system is

ABSTRACT The share of wind power in energy consumption is continuously increasing at the national level as well as global. Many national strategies plan an increase in the installed capacity of wind farms in the future. Accordingly, this paper provides an assessment of spatial suitability for wind farm siting and estimation of wind power potential for the territory of Serbia. The unsuitable areas (75

ABSTRACT In the construction industry, a large amount of carbon dioxide is emitted, due to the embodied and operational carbon. RICS Guidance note shows the stages producing the most carbon dioxide is the operational stage and the second significant area is the production stage. Recent studies have investigated reducing the operational emissions, however there is limited research on the embodied carbon

ABSTRACT Waste heat sources in industrial processes, transport sectors and solar energy generally possess fluctuating and intermittent nature, which presents a great challenge to the steady operation of Organic Rankine Cycle (ORC). Thus, a parametric study is conduced to investigate the dynamic behaviors of basic Organic Rankine Cycle under fluctuating heat source. Firstly, the dynamic simulation model

ABSTRACT Jordan is relatively poor in conventional energy resources and it is dependent on foreign energy sources to cover its energy needs. At the same time the low percentage of freshwater along with the rapidly growing population urge to drag the attention to water desalination. This study presents an investigation and assessment of renewable energy resources to operate a reverse osmosis desalination

ABSTRACT Domestic heating systems are an important energy consumption market from a country’s economic and environmental perspective. The domestic adoption of biomass heating systems is increasing in Europe and is considered environmentally friendly in terms of climate change in general, as well as secure in terms of fuel supply and price fluctuation. The results of this study indicate that potential

ABSTRACT A study of the existing literature on the effects of diethyl ether with different biodiesels such as Fish, Neem, Calophyllum Inophyllum, Cottonseed, and Soybean biodiesel was undertaken. Till date, no study related to the combined effects of repurpose used cooking oil biodiesel/diethyl ether/diesel blends and different compression ratios with different loading conditions has been reported

ABSTRACT The rising threat of environmental degradation and global warming has made countries realize the importance to adopt and promote sustainable practices. Therefore, the study aims to identify the contributing factors to the purchase intention for energy-smart household appliances (ESHA) in a developing country. Partial least square-structural equation modeling (PLS-SEM) technique enabled to

ABSTRACT This study proposes a technical and economic evaluation of a stand-alone wind-fuel cell (FC)-battery hybrid energy system for a residential house in Xining, China. The techno-economic analysis of the two different systems including the wind-battery and wind-fuel cell-battery systems has been conducted by employing HOMER (Hybrid Optimization Model for Electric Renewables) software. The optimal

ABSTRACT Proton exchange membrane fuel cell (PEMFC) has become a promising alternative power source due to its quiet operation, low emission, and high theoretical energy conversion efficiency. However, a relatively large fraction of the energy (around 40 ~ 50%) is dissipated into the ambient environment by the cooling system, leading to a waste of thermal energy. The present study aims to improve the

ABSTRACT This study was conducted on the impact of carbonization reaction on the performance of gangue–cemented paste backfill(GCPB). Tests were conducted using a carbonization box with CO2 concentrations of 0%,5%,and 10%. Each test was conducted for 3,7, and 28 days. We then conducted uniaxial compressive strength(UCS)testing, as well as X-ray diffraction(XRD)and scanning electron microscopy(SEM)analyses

ABSTRACT Thermoelectric power generation is an outstanding technology for high- and low-temperature heat recovery. Their packaging, lack of moving parts, direct heat to electrical conversion, and zero-emission are the main benefits for geothermal power generation. The design of a large-scale, ground-based, and segmented annular concentric cylindrical thermoelectric generators (CCTEGs) with produced

ABSTRACT Nowadays, the continuity of all activities related to industrial production is essential for the sustainability of modern life. In order to achieve this, it is necessary to ensure the continuity of energy demand. For an energy supply to be considered as reliable, a fast and reliable response should always be provided to changing demand. Pumped storage systems can meet these needs due to their

ABSTRACT Renewable energy sources are developing rapidly worldwide because they are unlimited and permanent, available in every country and also eliminate foreign dependency. In this respect, accurate renewable electricity generation (REG) forecasting is essential in a country’s energy planning in relation to its development. In this study, two different data-driven methods such as adaptive neuro-fuzzy

ABSTRACT Regarding water scarcity in recent decades, solar stills due to their environmental compatibility and economic viability received more attention. Through the current study, the performance of weir-type cascade solar still equipped with different phase change materials (PCMs) especially Nano-PCMs is evaluated. The utilized phase change materials are Stearic acid, Paraffin, and some kinds of

ABSTRACT The purpose of this study is to assess the potential improvement in fuel economy and performance of a fuel-cell series hybrid electric vehicle (FCHEV) in combination with a supercapacitor (SC) by using a hybrid power management (HPM) strategy. A combination of the extended Kalman filter (EKF) and traditional coulomb counting (CC) is used to conduct for estimating the SC state of charge. The

ABSTRACT In this study, thermodynamic analysis of a gamma-type Stirling engine driven by Scotch Yoke mechanism was conducted. The advantages of Scotch Yoke mechanism over classical crank mechanism were discussed in detail. In the analysis hydrogen was used as working gas. Working space was divided into 16 nodal volumes. Solution of conservation of mass and energy equation were obtained for each nodal

ABSTRACT This paper aims to measure heat transfer performance in heat pipe cooling device under constant heat flux condition. Emphasis is placed on a surface modification of heat pipe to enhance heat transfer performance. The surface fabricated here is coated by hydrogen codeposition of copper electrodeposits to modify the surface’s porosity and roughness. It is found that thermal resistance for the

ABSTRACT The present study deals with performance analysis of solar power tower powered combined pre-compression supercritical CO2 cycle and organic Rankine cycle (ORC) for recovering waste heat. Results showed that net power output and thermal efficiency of pre-compression cycle was improved by 4.51 and 4.52%, respectively, using ORC. Highest thermal, exergy efficiency, and power output of the combined

ABSTRACT Even though biomass is carbon-neutral renewable energy, the utilization of biomass results in sulfur oxides (SO x ), nitrogen oxides (NO x ) and particles emissions. Biomass briquetting and doping with additives are potential methods to ease these emissions. However, additives may increase the price for biomass application. Hence, another method is mixing different kind of biomass which possesses

ABSTRACT Severe deformation and failure frequently occur in roadways with soft or weak surrounding rock and have greatly influenced safe and efficient mining of coal in many coal mines. Using portland cement, emery and fly ash as main raw materials, through laboratory tests, effect of water/binder ratio, cement/sand ratio, water/sodium silicate ratio, water-reducing agent, fly ash/cement ratio, and

ABSTRACT The liquid contact angle on a solid surface is important in evaporation processes, which characterizes the wettability, and the spread of liquid films or droplets on the working surface. Thus, it critically affects heat and mass transfer, and evaporation performance accordingly. The evaporating droplet contact angle is complicated, accompanied by internal flow, heat/mass transfer, and phase

ABSTRACT The aim of the study was to produce biodiesel from animal oil as non-edible feedstock. Three different concentrations of oils were used to produce the biodiesel. The main characteristic of these oils was high-free fatty acid content. The oils were transesterified with acid and basic catalysts, respectively. Biodiesel yield of 90 wt.% was obtained by acid transesterification (9 wt.% HCl, 6:1

ABSTRACT A novel membrane-electrode structure is conceived and prepared in this work, where a graphene-contained layer is constructed between anode catalyst layer and membrane, also the material composition in this layer is optimized to improve the performance of a direct methanol fuel cell (DMFC) with high-concentration fuel. The polarization test shows that the pristine graphene layer could reduce

ABSTRACT Digital hydraulics is a potential technology for the Hydraulic Pitch System (HPS) in Wind Turbine (WT). Digital Hydraulics Pitch System (DHPS) uses Digital Flow Control Units (DFCU) to develop the precise pitching action. In this paper, a novel Intelligent Digital Pitch Controller (IDPC) is proposed. The proposed controller is designed and implemented on a developed lab-scale DHPS Hardware-in-the-Loop

ABSTRACT This study provides designing and techno-economic analysis of a low voltage (48 V) DC microgrid for domestic load application. In present DC microgrid, photovoltaic (PV) is considered as main power generator to deliver the load demand while fuel cell (FC) and battery are considered as backup power sources. To establish a 48 V DC bus, suitable DC-DC converter having wide input voltage range

ABSTRACT Electric vehicles that run on batteries have a major disadvantage of temperature abnormalities when operated at extreme working conditions. Therefore, thermal management of battery pack is essential to ensure its safety and performance. There are three operation strategies of thermal management air-based, liquid-based, and phase change material-based battery thermal management systems (BTMSs)

ABSTRACT Solar thermal systems have encountered a high level of interest over the last ten years due to their low cost and convenience in reducing energy load for domestic hot water. This paper aimed to introduce a new panel’s material (Versa Tyle GRP Tiles) for solar thermal system and a prototype was built in a small shed at a site in Liverpool (UK), in order to assess its performance. The experiment

ABSTRACT The gas-water separator is an important auxiliary component of the hydrogen recirculation subsystem for the proton exchange membrane fuel cell (PEMFC) system. This study investigated three baffle separators with different structures used for a 75 kW PEMFC system by computational fluid dynamics (CFD) simulation and experimental validation. An Euler-Lagrange two-phase simulation model was established

ABSTRACT Thermoelectric power generation is an outstanding technology for high- and low-temperature heat recovery. Their packaging, lack of moving parts, direct heat to electrical conversion, and zero-emission are the main benefits for geothermal power generation. The design of a large-scale, ground-based, and segmented annular concentric cylindrical thermoelectric generators (CCTEGs) with produced

ABSTRACT A study of the existing literature on the effects of diethyl ether with different biodiesels such as Fish, Neem, Calophyllum Inophyllum, Cottonseed, and Soybean biodiesel was undertaken. Till date, no study related to the combined effects of repurpose used cooking oil biodiesel/diethyl ether/diesel blends and different compression ratios with different loading conditions has been reported

ABSTRACT Domestic heating systems are an important energy consumption market from a country’s economic and environmental perspective. The domestic adoption of biomass heating systems is increasing in Europe and is considered environmentally friendly in terms of climate change in general, as well as secure in terms of fuel supply and price fluctuation. The results of this study indicate that potential

ABSTRACT Digital hydraulics is a potential technology for the Hydraulic Pitch System (HPS) in Wind Turbine (WT). Digital Hydraulics Pitch System (DHPS) uses Digital Flow Control Units (DFCU) to develop the precise pitching action. In this paper, a novel Intelligent Digital Pitch Controller (IDPC) is proposed. The proposed controller is designed and implemented on a developed lab-scale DHPS Hardware-in-the-Loop

ABSTRACT To enhance the air-cooling process in geothermal power plants for economical utilization of the exhaust steam from expansion, a natural-draft thermal chimney design was proposed and studied here in this paper. In view of the necessity of accurate velocity field measurements which would provide further insight into the physics behind the evolving plumes above heated horizontal cylinders, Particle

ABSTRACT Both theoretical study, experimental validation, and outdoor performance assessment of a single grid-connected photovoltaic plant installed on the roof of the car parking located in Renewable Energy Applied Research Unit (URAER), Ghardaia, southern of Algeria have been carried out in this paper. The plant is made up of 16 micro-amorphous modules of 125 Wp and one SMA sunny boy inverter of

ABSTRACT The thermal performance of a novel solar air heater was experimentally studied in this paper. For this aim, a new solar air collector was designed using copper wool on its absorber plate to be a selective surface. Hence, the area of absorber plate was enhanced to absorb much amount of heat energy. The experimental study was conducted for both cases (presence and absence of copper wool on the

ABSTRACT A combined gas power cycle with humidification has been investigated using the advanced exergy analysis. The combustion chamber and humidifier were found to be the components with the largest exergy destruction. For a prescribed overall power generation, the exergy destruction at the combustion chamber increased, while that at the humidifier decreased when the humidification ratio at the bottoming

ABSTRACT Overall developments in internal combustion engines suggest that the ORC system recovers exhaust heat for further use, increases system performance, and decreases adverse environmental impacts, including greenhouse gas emissions, and particulate matter. This paper presents an overview of crucial advancements in the field of ORC application in commercial vehicles for WHR and continuing developments

ABSTRACT Solar cells have ruled the photovoltaic industry for decades and has paved for various research pathways of new materials such as perovskites. Inorganic-organic hybrid perovskite-based solar cells have received tremendous attention over last few years. The perovskite solar cells (PSCs) are preferred over other solar cells due to their cost effectiveness and high power conversion efficiency

ABSTRACT This study focuses on techno-economic and environmental feasibility study of a hybrid grid connected wind/PV/biomass energy system for Marmara University Goztepe Campus in Istanbul. HOMER software is used to determine the optimum size of the equipment, based on the geographical and meteorological data of the campus. According to the simulation results, the energy system with the minimum net

ABSTRACT A novel Sb2S3/SnO2 bundle-like nanocomposite has been synthesized via a facile solution method followed by a hydrothermal process. When used as the anode material for sodium-ion battery (SIB), this material with unique hetero-nanostructure shows superior electrochemical performance to those of individual Sb2S3 and SnO2. The Sb2S3/SnO2 anode shows an initial reversible capacity of 711.4 mAh/g

ABSTRACT The share of the building sector accounts for one-third of the total energy consumption in the final energy demand in the world, and they are, indeed, paramount factors for CO2 emissions. Energy consumption in developing countries piles up to 40%, while this is higher in Iran, and for this reason, energy saving in this sector plays a prominent role. This paper aims to study the effects of

ABSTRACT Industrial research departments and chemical engineering institutes have begun to adopt additive manufacturing technologies, such as stereolithography for producing special types of reactors for continuous production. Microreactors have been widely used to improve the mass and heat transfer processes between immiscible liquid-liquid phases, but with the disadvantage of requiring sophisticated

ABSTRACT Energy demand in the world is overgrowing due to rising population and technological developments. It is vital to move toward a reliable, economical, and sustainable renewable energy source for energy needs arising in the future. Among other renewable energy sources, solar energy is a promising source of energy for handling long-term problems in the energy crisis. Solar power generation is

ABSTRACT The conventional Savonius turbine is one of the most used rotors to convert the kinetic energy of natural water resources instead of potential energy. However, this rotor presents low efficiency. A twisted Savonius turbine was appeared which is considered most performant by twisting the blades of the conventional Savonius turbine along theirs spans. In fact, various experimental and numerical

This paper discusses about the effect of feeder height and heat flux on the heat transfer characteristics of horizontal tube falling film evaporation in the thermal regimes. In order to investigate this, a two- dimensional CFD model was developed to perform simulation and results were compared and validated with published data available in the literature. Heat transfer co-efficients in the thermal

Absorption refrigeration system is a heat-driven refrigeration system, which has a good application prospect in co- and tri-generation system, and is of great significance to energy conservation and emission reduction. In this paper, the combined power and cold system the combined power and cooling system and the combined cold cooling, heat, and power system based on absorption refrigeration are reviewed

The introduction of the new biomass industry exerts influences that change the interactions among economic sectors by drawing the resources for generating electricity, pricing alterations from the existing market and competitively selling electricity to the power grid. These influences should be described and identified to ensure the benefits to the local economy. In this article, we deem to test the

Biodiesel emulsion fuel is reported as one of the most feasible options capable of generating lower NOx emission than that from fossil fuels. However, oil and water in the emulsion fuel are easily separated and unstable. The aim of the present study is to consider the production and stability of biodiesel emulsion fuel by using tetraglycerin ester (CR-310), i.e., one of lipophilic surfactant, polyglycerol

ABSTRACT This study aims to evaluate wind resource potential and analyze the performance of wind turbines for six onshore and near-coast sites (three commercial power plants and three new potential sites) of Pakistan. The technical and economic performance analysis of more than 200 commercially available turbines suitable for weak wind regions is performed, 20 turbines were selected based on performance

Biodiesel emulsion fuel is reported as one of the most feasible options capable of generating lower NOx emission than that from fossil fuels. However, oil and water in the emulsion fuel are easily separated and unstable. The aim of the present study is to consider the production and stability of biodiesel emulsion fuel by using tetraglycerin ester (CR-310), i.e., one of lipophilic surfactant, polyglycerol

Absorption refrigeration system is a heat-driven refrigeration system, which has a good application prospect in co- and tri-generation system, and is of great significance to energy conservation and emission reduction. In this paper, the combined power and cold system the combined power and cooling system and the combined cold cooling, heat, and power system based on absorption refrigeration are reviewed

Big data is gaining visibility and importance, and its use is attaining higher levels of influence within municipalities. Due to this proliferation smart cities are posed to deploy architectures toward managing energy for Electric Vehicles (EV) and orchestrate the production, consumption, and distributing of energy from renewable sources such as solar, wind etc. in communities also known as prosumption

Carbon nanotubes have been synthesized by chemical vapor deposition at 850°C using silkworm cocoons as a precursor. The impregnation method with 3 wt% ferrocene as a catalyst was utilized for growth of carbon nanotubes. The flow rates of C2H2, H2, and N2 were fixed at 100, 150, and 350 ml/min, respectively. Morphology, microstructure and quality of the synthesized carbon nanotubes were investigated