Leveraging the flexibility of static batteries and residential flexible loads is an effective way to reduce the impacts of intermittent renewable energy power generation on the utility grid. However, there is lack of proper operation strategies to manage these distributed energy resources. To address this problem, a novel forecasting and flexibility-based operation strategy was proposed for the ph

Green hydrogen plays a strategic role in the decarbonization of the maritime transportation. A step useful to favor the use and the exploitation of the hydrogen is the development of hydrogen supply chains that, by including both the infrastructures and the end users, can simplify the economic issues and the authorization processes. This paper is focused on the designing, sizing and economic feasibility

This study gathered hourly temperatures and solar radiation data from 42 years for walls in five cities within the five major climate zones across China. The long-term hourly operative temperatures in summer were determined in accordance with the ISO standard. A novel index is proposed to analyse quantitatively the local climate potential of free-running buildings. The index calculates the number of

The European Union defined the ambitious carbon-neutrality goal for 2050. Such a transition must be done gradually to avoid huge investments; therefore, medium-term energy planning of energy supply systems must be performed properly considering both economic and environmental aspects. Sector coupling measures aid to achieve this ambitious target, although they require a remarkable financial investment

This paper proposes an electromagnetic bi-stable energy harvester (EBEH) with tunable stiffness for scavenging the hydrokinetic energy from flow-induced vibration (FIV) scenarios. A mathematical model of the magneto-mechanical–electrical coupling system is established considering vortex-induced forces, wake oscillator effect, negative linear stiffness and hybrid excitations. The bi-stable system with

Sorption-enhanced H2 production using CaO promotes H2 generation by capturing CO2 in the form of CaCO3. Coupling methane reforming of CaCO3 in sorption-enhanced H2 production combines CaO regeneration with in-situ CO2 utilization. This integrated concept is expected to achieve high H2 production with CO2 capture and in-situ conversion into syngas. To evaluate the overall performance of the integrated

Refrigerant injection technique can be applied to heat pumps in cold regions to enhance performance and reliability, but currently this technique is mainly used in scroll compressors, and relatively few applications are for rotary compressors. In this paper, the performance of a vapor and two-phase injection (VTI) heat pump with a rotary compressor is experimentally studied under different injection

Electrification of remote communities is a great challenge worldwide. Their reliance on economically and environmentally unfavourable diesel generators makes these communities attractive target markets for renewables. Concentrating solar thermal (CST) plants operating on supercritical CO2 (s-CO2) Brayton power cycles have been proposed for their high efficiency, compactness, compatibility with natural

Water electrolysis using solid oxide electrolysis cells is a promising method for hydrogen production because it is highly efficient, clean, and scalable. Recently, a lot of researches focusing on development of high-power stack system have been introduced. However, there are very few studies of economic analysis for this promising system. Consequently, this study proposed 20-kW-scale high-power solid

Humidification and dehumidification (HDH) desalination technology has attracted wide attention in the field of small-scale dispersed fresh water demand, because of its advantages such as simple configuration, low investment, and utilization of low-grade renewable energy and waste heat. In this paper, a heat pump coupled two-stage humidification-dehumidification desalination system with waste heat recovery

CCS can effectively solve the problem of large-scale carbon emissions from coal-fired units, but at a considerable expense in terms of high energy and water consumption. In this paper, the conventional MEA-based CO2 capture system process is improved and integrated optimization with coal-fired power plant. An MEA-based CO2 capture system coupled with membrane condenser and an improved integrated decarbonization

The current study presents techno, economic and environmental assessment of hydrogen production systems using low (PEM, Proton exchange membrane) and high temperature electrolyzers (SOEC, solid oxide electrolyzer cell) powered by different energy sources. These sources are PV panels, wind turbines, Rankine cycle based on waste heat recovery, and electricity from grid. The mathematical model of the

Parameter identification of the photovoltaic (PV) model is essential to research in the PV field. A two-stage method of model parameter identification based on maximum power matching (MPM) and improved flow direction algorithm (IFDA) is proposed. The two-stage method, i.e., MPM-based rough extraction and IFDA-based precise identification. The quality of I–V data dramatically impacts the PV model’s

A humidification dehumidification system is a cost-effective thermal desalination system. It is well-suited for small-scale and off-grid applications to extract freshwater from seawater with minimum maintenance. The primary drawback of humidification dehumidification systems is the low thermal performance, and thermodynamic balancing using the extraction technique can substantially improve the system's

Two-phase heat transfer holds great potential to achieve efficient thermal management for high-power applications. However, achieving high thermal performance and sustainability simultaneously could be mutually exclusive. Here, we develop a rational design of a heat sink via liquid film boiling in hybrid mesh with active liquid supply. The heat sink exhibits a high critical heat flux of over 600 W/cm2

Electrolysis systems based on low temperature PEM cells have fast ramp rate and load-following capability that makes them suitable to provide services to the power grid, whose reliability is hindered by the increasing deployment of dynamic and non-controllable renewable energy sources. Flexible operation of the complete electrolysis unit is influenced by system design and auxiliaries: this work provides

To meet the power and long-range driving requirements of the vehicle, this paper presents a dual mode operation scheme for a range extend fuel cell hybrid vehicle for the first time, with an in-depth study of the pure electric mode and the range extend mode. The deep deterministic policy gradient algorithm is a well-known deep reinforcement learning algorithm that can solve complex nonlinear problems

The aim of this work is focused on design of a sustainable tri-generation system driven by a biomass (MSW: municipal solid waste) externally-fired gas turbine cycle and utilizing a double-effect absorption chiller/heater. A robust framework based on energy, eco-exergy, and environmental analyses is developed to access the reliability of this proposal. An innovative optimization approach is then applied

Hydrogen (H2) is the fuel of the future since it only produces water as the combustion product. This paper proposes a rational design of a hydrogen-burning power plant integrated with an onsite hydrogen production unit. The H2 production from natural gas is achieved by converting the CH4 to gaseous H2 and solid carbon product based on CH4 catalytic decomposition. Fe-based catalyst is suggested for

To guarantee clean heating of buildings in cold regions, an off-peak electricity driven chemisorption heat pump employing SrCl2/sulfurized expanded graphite composite sorbent is developed. However, the heat output temperature of chemisorption heat pump fluctuates greatly, up to 30 °C, which seriously restricts its popularization and application. In this paper, the above-mentioned problems are solved

A two-bed adsorption refrigeration cycle (ARC) with a new proposed modified mass recovery process is investigated (modeled, optimized and compared with ARC cycle with conventional mass recovery process) here. This proposed modified mass recovery process increases the system cooling capacity and cycle exergy efficiency. These achievements reached by opening the connecting valve between two beds during

Despite the recognition of its energy-saving potential, the promotion of liquid desiccant air-conditioning system is limited by the drawbacks of existing desiccants in long-term or large-scale use. Deep eutectic solvent with good bio- and eco- friendliness has not yet been tested for systematic study in air-conditioning system. In this paper, a deep eutectic solvent, ethaline, is utilized in a heat

In this study, multi-objective optimum energy management strategies are developed for pre- and post-transmission parallel hybrid electric vehicles. The first strategy aims to improve fuel economy and electric system efficiency, while the second strategy adds the improvement in battery performance and life. Multi-objective genetic algorithm is adopted to solve the formulated optimum energy management

In order to address the growing demands for clean energy, coupled with the efforts to reduce greenhouse gas emissions, this study concerns a newly developed hybrid renewable energy system, which integrates solar and wind energy options, augmented with compressed air energy storage and battery storage solutions. The novelty of this paper stems around the diversification of energy storage solutions,

Waste-to-energy technology is among the most important parts of a sustainable waste management system nowadays. By adding a renewable source of electricity (solar photovoltaics) and power to gas (proton exchange membrane electrolyzer and the Sabatier reactor) to convert CO2, the environmental problems of waste to energy plants (here incineration and landfill) can be tackled. To solve freshwater scarcity

The combined production of different energy vectors with Multi Energy Systems is a very attractive opportunity to increase the generation efficiency, compensate the oscillations of renewable sources, and improve the flexibility in power generation. Optimizing their operation is a complex task, since the problem can easily reach high dimensions, representing a challenge for commercial solvers. The inclusion

This paper presents a fully coupled aero-hydro-servo-elastic method to simulate floating offshore wind turbines (FOWT) based on Modelica language and AeroDyn co-simulations. The main features of this method are as follows. (1) The features of Modelica language (equation-based, object-oriented, and hierarchy structure) afford extreme flexibility and efficiency in the modeling process, and wind turbine

Recovering bioenergy through anaerobic digestion (AD) has become the most attractive waste management approach in modern industrial plants, because both the environmental adequacy and the provision of clean biogas-derived energy can be successfully met. Recent investigations have particularly shown the energetic benefits of residue co-digestion in sugarcane biorefineries, which significantly enhances

Supercritical CO2 (sCO2) is examined as a working fluid for the first time in a unique thermal management strategy that aims to control undesirable thermal behavior in battery cooling applications. In the pseudocritical region, sCO2 has a high volumetric thermal capacity with low critical pressure and temperature, which not only reduces system complexity and costs but also eliminates the possibility

Green hydrogen is suitable for grid-scale energy storage to increase the penetration of renewable energy, and it is also an alternative to fossil fuels. However, it still suffers from storage problems owing to its low volumetric energy density, embrittlement, and very low boiling point. To improve safety and reduce cost, green ammonia has been proposed as a substitute for hydrogen and has attracted

In the context of sudden changes in global energy supply patterns, promoting the diversification of energy supply is an important movement for the sustainable development of the economy. Nuclear energy as a green and clean energy source has undergone rapid development. About 60 wt% of the world's fluorine production is used to produce uranium, a fuel for nuclear power plants. However, fluorine as a

Abstract Energy harvesters based on non-linear systems are promising devices for extracting energy from mechanical vibrations. This paper presents a new design of energy harvester consisting of two coupled nonlinear systems; the Duffing oscillator and a system with quasizero stiffness. A numerical analysis of the dynamics of the harvester is carried out, presenting coexisting solutions and their energy

Solar thermionics, owing to its silent operation and potential effectiveness in converting solar energy into electricity, is becoming a promising advanced technology for concentrated solar power. However, conventional solar thermionic emission and associated solar-to-electricity conversion are weakened because a portion of the cathode’s energy is transmitted to the anode in the form of thermal radiation

Regional level energy system analyses and corresponding integrated modeling is necessary to analyze the impact of national energy policies on a regional level, while considering regional constraints related to energy infrastructure, energy supply potentials, sectoral energy demands, and their interactions. Nevertheless, current literature on energy system analysis largely overlooks the regional level

Imprudent fossil fuel use for getting energy caused serious environmental problems making us necessary to seeking for alternative energy sources which are renewable and sustainable. Using wind energy is currently considered as one of feasible renewable energy sources, however, the problem of noise pollution from the sweep of turbine blades should be solved. As a feasible solution for the noise pollution

High-temperature heat pumps represent an emerging technology with a great potential in supplying clean heat to energy intensive industries. Suitable refrigerants for high-temperature heat pumps (up to 200 °C) have not been identified yet. This work aims to analyze the performance of binary mixtures as working fluid in high-temperature heat pumps delivering heat up to 200 °C with a special focus on

This paper presents a study carried out as part of commissioning and testing of world’s first grid-scale 150 kWe Pumped Heat Energy Storage (PHES) demonstration system. The system employs two novel layered packed-bed thermal stores. The present study experimentally investigates one of the stores designated as “hot thermal store”, which has an energy storage density of 1072 MJ/m3 and stores heat at

Coking dry gas is a kind of refinery dry gas, which is rich in H2 and light hydrocarbon resources, but it’s often used as fuel, resulting in inefficient utilization of dry gas resources and a large amount of air pollutants emissions. Solid oxide fuel cell can efficiently convert the chemical energy of hydrogen into electricity. Therefore, this work establishes a model of a power generation process

Solar thermochemical methane dry reforming process has great potential for long-term energy storage. Most of the current researches focused on the development of efficient catalyst or the operation optimization of solar reactor with certain structure design. However, there is still a lack of research into the comparison study of different reactor structure designs and optimization strategies for chemical

Previous studies have focused on the horizontal buried pipe section regarding the performance improvement of the earth-to-air heat exchanger, showing limited attention paid to the vertical air inlet section. In this study, we proposed a novel earth-to-air heat exchange system utilising an inlet plenum chamber (IPC-EAHE) to pre-treat the outdoor air in the inlet section. To evaluate its cooling performance

The growing demand for pure water and the challenges of energy transition encourage the use of renewable energies in desalination. This investigation aims to carry out an energy, exergy, economic and environmental analysis of a hybrid RO/MED-TVC desalination powered by CPV/T systems. The electrical and thermal needs of the hybrid desalination unit are supplied by a concentrated photovoltaic solar field

The increase in global wind power installations has also increased the wind turbine density in wind farms. This has made the wake interactions between neighbouring turbines more significant and difficult to describe. Understanding wakes is important to predict the energy production and assess their environmental impacts. Although existing wake description methods can predict the average wind turbine

Conventional transesterification processes not only require large amounts of methanol and catalysts but are also time-consuming and operate at high temperatures. Advanced methods such as non-thermal plasma have been studied for biodiesel production because they mainly reduce the temperature as well as the reaction time. In this study, a liquid-phase capillary discharge plasma reactor was developed

The integration of the pumping station between conventional cascade hydropower stations to form the hybrid pumped storage has the potential to increase the hydropower’s flexibility and promote the consumption of renewable energy into the power grid. However, the conversion of electricity and water potential energy between the pumping station, hydropower, wind power, and photovoltaic poses challenges

In this study, triply periodic minimal surface (TPMS) structures have been implemented in adsorber/desorber to improve the performance of adsorption cooling systems (ACSs). The use of metal TPMS-based structures considerably increased the effective thermal conductivity of the porous media/metal composite due to its large surface area to porous media volume. A fully-three-dimensional CFD model was constructed

Abstract not available

With global energy consumption increasing year by year, the industrial sectors of the world’s countries have never been more urgent in achieving carbon reduction. Renewable energy plays a crucial role in the industrial decarbonization process. As the most mature renewable energy technology, wind and photovoltaic power generation have made significant progress in recent years. However, the intermittent