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The catalytic hydropyrolysis and co-hydropyrolysis of algae (microalgae and macroalgae) and used engine oil (UEO) for the production of potential fuels for automobiles were examined. The co-hydropyrolysis of algae and UEO produced oils that possessed slightly higher H and C content, a higher H/C atomic ratio, and an extensively reduced heteroatom (59.78–75.62% for O, 6.98–81.65 for N, and 43.30–86...
In the scenario of increasing of the worldwide energy demand an important role can be played by the Organic Rankine cycle (ORC). Due to the nature of the working fluids, they partially decompose with the temperature. The main focus of this paper is to evaluate the behavior of the power plants that operate with a partially decomposed organic fluid. The investigated fluids are MDM and isopentane. An...
The feasibility of employing combined heat and power (CHP) systems for providing the required heat in power productive gas expansion stations (PPGES) has been studied. However, there is no study in the literature indicating which PPGES is an economically efficient host for the CHP technology. In this work, comprehensive energetic and economic analyses are accomplished on several gas expansion stations...
Despite of the high demand for liquefied natural gas (LNG) in demanding countries, an ideal means for establishing the LNG supply system has not yet been found in many regions. In this paper, a three-stage stochastic programming method has been proposed for LNG supply system infrastructure development and inventory routing in demanding countries. The minimum daily cost is set as the objective function;...
Utilization of renewable energy based distributed generation such as wind turbine generation (WTG) provides proper opportunity for enhancement of the electric power distribution networks. However, appropriate integration of WTG in distribution networks is crucial for ensuring quality and reliability of power supply. This paper presents a novel and comprehensive solution methodology for optimum allocation...
Effective and accurate forecasting of solar radiation plays a critically important role in the design of grid-connected photovoltaic installations. However, this is an extremely challenging task because of inconsistencies in variable selection and the prohibitively expensive computational cost as the number of variables increases. Although the support vector machine (SVM) can be applied to forecast...
This paper presents an optimal planning and scheduling on energy storage systems (ESSs) for congestion management in electric power systems including renewable energy resources. The proposed problem finds optimal capacity and charging-discharging regime of ESSs. The storage units are optimally charged and discharged to tackle the uncertainty related to wind-solar units as well as relief congestion...
A growing number of governments have begun to implement benchmarking or energy disclosure policies. By requiring owners to measure and disclose their energy use, these policies are intended to transform the market for energy-efficient investments in existing buildings. To improve future policy efforts, two critical questions are: first, how much energy do these policies save? and second, what particular...
Indirect methods have great potential for engine diagnosis. Several methodologies have been proposed in the past in which indirect measurements are used for combustion sensing.This paper presents the results of the application of a methodology developed by the authors in which an accelerometer mounted on the engine block is used to characterize the combustion development in a multi-cylinder common...
The primary aim of this study is to develop a new forecasting system for hourly electricity load in six Italian macro-regions. The statistical methodology is centered around a dynamic regression model in which important external predictors are included in a seasonal autoregressive integrate moving average process (sarimax). Specifically, the external variables are lagged hourly loads and calendar...
India’s ever increasing population has made it necessary to develop alternative modes of transportation with electric vehicles being the most preferred option. The major obstacle is the deteriorating impact on the utility distribution system brought about by improper setup of these charging stations. This paper deals with the optimal planning (siting and sizing) of charging station infrastructure...
Offshore wind energy potential and its technical and economic feasibility were determined in Chile. Wind speed data from ERA-Interim reanalysis 10 m above the sea surface between 1979 and 2014 was used. The capacity factor and performance of the V164–8.0 MW wind generator was also determined. Using this information along with data from other studies, the following economic indicators were calculated:...
Experiments for an upgraded liquid oil production via fast co-pyrolysis of bamboo residual and waste tire over two catalytic beds of CaO and HZSM-5 were conducted, and the effect of CaO to HZSM-5 mass ratio on pyrolytic products distribution was investigated and analyzed. Furthermore, a novel modification method for enhancing the catalytic performance of HZSM-5 by an integrated alkali treatment and...
A new real-time capable heat release rate model is presented that captures the high dilution effects of exhaust gas recirculation (EGR). The model is a Mixing Controlled Combustion type with enhancements to account for wall impingements, pilot injections, charge dilution caused by EGR at part load. The model was parameterised in two steps using a small set of measured data: the majority of model parameters...
This study investigates the utilization of heat from the exhaust gas and the exhaust air of gas turbine with air bottoming combined cycle (GT-AB) by using steam and absorption bottoming cycles in different combinations. For the utilization of heat from both sources, the results indicate that the maximal efficiency occurs at a GT pressure ratio of 11, the AB pressure ratio is 6 for utilization of heat...
Two stage ammonia-water absorption refrigeration system is applicable for low driving temperature heat source and large temperature lift applications. However, low system performance weakens its advantages because the large heat dissipation brings unacceptable power consumption. Better internal heat recovery is significantly effective for system performance improvement. This paper presents an analysis...
The present study aims to investigate the performance of a thermoelectric generator (TEG) under the influence of sinusoidal temperature distribution at the hot side or cold side surface. The impacts of the period and amplitude of the periodic temperature, the temperature difference between the two surfaces, and the external load resistance on the power output and efficiency of the TEG are studied...
Building integrated ETFE foils are used as the absorbing structure in the solar energy targeted applications. These foils as a building transparent material have been drawing much more attention for the past decades. In addition, integration of amorphous photovoltaic cells with these ETFE foils is taken into account due to the low production cost and its resistance to high operating temperatures....
Numerical studies on the 1-D laminar premixed flame were conducted utilizing the detailed mechanisms to evaluate the validity of several heat release rate (HRR) markers for the single-valued prediction on the HRR in a wide range of conditions. The biogas and methane with hydrogen enrichment are used as the fuel. The peak-to-peak correlation and the peak-to-integrated correlation of considered markers...
The current situation, which is driven by environmental concerns and increased air traffic, forces airport operators to examine their energy systems in an integrated approach. In order to optimize total expenditures, demands of energy in all forms must be considered. This paper introduces a novel method for the optimal design of multi-modal energy systems, which will be put to further use in the European...
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