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Oxygen carrier holds a significant role in chemical looping combustion (CLC) process. High redox rate is a prerequisite for oxygen carrier when solid fuel is applied in CLC. The present work proposed iron ore modified by rape stalk ash (RSA) and wheat stalk ash (WSA). Dry calcination and wet impregnation methods were used. Effects of biomass ashes species, temperature, biomass ashes/undecorated iron...
A Ford 1.8 l high-speed diesel engine (HSDI) is utilized for a thorough investigation of split dual injection with two included-angle nozzles. The system is equipped with variable-geometry turbocharging (VGT) and high-pressure common-rail (HPCR) technologies which lets multi-injections per cycle. The share of fuel between pulses is divided into three portions of 70-30, 80-20, and 90-10 with included...
Building refurbishment is a key in promoting environmentally sustainable development due to its potential for reducing greenhouse gas emissions and energy consumption associated with existing buildings. The general metrics for assessing the impacts of refurbishment have not been established for existing buildings in most of the countries. In Malaysia, there is currently no single environmental assessment...
The principle of input-output analysis, the Mean Rate of Change Index and the Logarithmic Mean Divisia Index were used to conduct the quantitative analysis of the current China's energy consumption from the national industrial level and regional level. It was aimed to calculate the impact and contribution rate of various factors on energy consumption growth in China. The purpose of this research is...
A novel n-octadecane@PMMA/TiO 2 hybrid shell PCM was prepared through a facile emulsion method, then characterized and estimated for thermal energy storage. During the synthetic process, the emulsion was enhanced by modified TiO 2 particles to improve the stability and thermal conduction. The aggregation process can be performed by an eco-friendly and efficient way, which was carried out under ultraviolet...
This paper presents a numerical study of a horizontal axis wind turbine under stalled flow condition with the tip speed ratio λ=4.17. Both RANS and DDES simulations are performed using OpenFOAM in order to predict the aerodynamic characteristics of the wind turbine rotor. In addition, numerical results are compared with experimental data where a good agreement is achieved. The complex and unsteady...
Double layers shape-stabilized phase change material (SSPCM) wallboard could improve building indoor thermal comfort both in summer and winter. The exterior and interior layer was active in summer and winter, respectively. In order to study thermal performance of building integrated with double layers SSPCM wallboards in real weather conditions without air conditioner, two simplified experimental...
Recent electricity management systems such as Smart Grids and Virtual Power Plants help to better integrate distributed generation renewable resources (RDG), such as photovoltaic, small hydro or micro wind in electricity markets. In this context, an important increase of small-scale power generation technologies is expected in Spain by 2020, according to the Spanish Action Plan for Renewable Energy...
Cathode cooling degree influences electron emmision and deposited rare earth atoms transferring behaviours in tungsten-based arcing process. Experimental study was carried out with three different types of tungsten-based cathodes (lanthanized, thoriated and yttriated) in no cooling mode and water cooling mode, respectively. Compared with no cooling mode, the height of high temperature cathode region...
State of health estimation is critical for ensuring the safety and dependability of lithium-ion batteries. In practical usage, batteries are seldom completely discharged. With a constant current-constant voltage charging mode, the incomplete discharging process influences the initial charging voltage and the charging time of the subsequent constant current charging, greatly hindering the applications...
The paper presents the calculated performances of an energy-technological complex (ETC) consisting of an electric generator based on a gas piston unit (GPU), a torrefaction reactor and a heat-recovery boiler (HRB) for incinerating torrefaction volatile products. A one-dimensional mathematical model was used to simulate the operation of the torrefaction reactor with direct heating and recirculation...
In 2017 about 37% of the world's wind turbines and 50% of the world's photovoltaic (PV) panels are installed in China. But at the same time a huge amount of wind power and PV power is wasted mainly because of insufficient flexibility of thermal power which is the dominant source in China's electricity system. This paper aims to assess the flexibility requirements for thermal power plants to accommodate...
This paper discussed the approach for designing an electric powertrain in saving energy while maintaining vehicle power performance and ride comfort. Usually, energy consumption can be improved by motor efficiency optimization. As an innovative layout, electric vehicle with in-wheel motor may suffer additional vibration due to the increase of unsprung weight. Thus, vehicle ride comfort, together with...
Exhaust air insulation building envelope can recover and utilize the low-grade energy inherent in the exhaust air to prevent the heat transfer through the building envelope. The study investigates a triple glazed exhaust-air window (TGEW), which can switch its operation mode between the cooling and heating season. A two-dimensional numerical model was proposed to analyze the conjugated heat transfer...
Grid flexibility determines the capacity limits of variable renewable energy without any restrictions or wasted energy. In this study, we propose a simple but feasible method to estimate the grid flexibility on a national scale, using available datasets. The method is demonstrated to assess the grid flexibility in Japanese power plants under different operating conditions. In addition, we evaluate...
The availability of Thermal Energy Storage systems in Concentrated Solar Power plants makes them suitable to handle the gap between energy supply and power demand. Increasing the total thermal energy storage capacity of the Thermal Energy Storage materials used is of interest to improve their efficiency. In this work the thermal energy storage of the so called solar salt (60% NaNO 3 - 40% KNO 3 )...
The India’s annual milk and ghee production are approximately estimated as 160 MT and 1.72 MT respectively. India has the largest production of Ghee in the dairy Industry worldwide. Ghee consumption in India is 28% annually after fluid milk i.e. 44% due to high consumer demand. The butter churner, butter melter, ghee boiler and ghee clarifier are the key subunits of ghee production plant. The dairy...
Biofuel production is of particular interest to Taiwan in the face of energy insecurity and climate change. Since climate-induced impacts such as changes in regional temperature and precipitation will influence crop yields, this study accommodates the estimated yield changes and subsequently develops a two-stage stochastic programming with recourse model to investigate the economic and environmental...
In order to enhance the heat recirculation in micro combustors, a micro planar combustor partially filled with porous medium was developed. The objective of the present work is to study the interaction between the heat recirculation and the flame stability. The thermal non-equilibrium model was employed to investigate the heat transfer between the gas and porous medium. The results show that adding...
Long-term electricity consumption (EC) forecasting is a very important part for the expansion planning of power system. Instead of point forecasting, based on fuzzy Bayesian theory and expert prediction, a novel long-term probability forecasting model is proposed to predict the Chinese per-capita electricity consumption (PEC) and its variation interval over the period 2010–2030. The special model...
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