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Using energy systems analysis, we examine the potential to reduce CO 2 emissions and oil use by integrating motor biofuel production with pulp mills. BLG-DME (black liquor gasification with di-methyl ether production) is compared with solid biomass gasification with BIG-FT (solid biomass gasification with Fischer-Tropsch fuel production). The studied systems are expanded with stand-alone production...
We propose in this paper an original technique to predict global radiation using a hybrid ARMA/ANN model and data issued from a numerical weather prediction model (NWP). We particularly look at the multi-layer perceptron (MLP). After optimizing our architecture with NWP and endogenous data previously made stationary and using an innovative pre-input layer selection method, we combined it to an ARMA...
Permeability has been identified as one of the foremost factors that determine the effectiveness of CO 2 sequestration in deep coalbeds. Coal matrix swelling can cause a remarkable decrease in the permeability of a coalbed reservoir during the carbon dioxide injection process. The main aim of this paper is to correlate the diametrical swelling percentage with coal permeability. This experimental...
This paper presents a mixed activity-based costing decision (MABCD) model for green airline fleet planning under the constraints of the European Union Emissions Trading Scheme (EU ETS), in which activity-based costing (ABC) model is incorporated with a modified product-mix decision model for total operating costs of individual flights under EU ETS constraints. A numerical example for comparing cost-effectiveness...
In the 20th Century many buildings became totally dependent on fossil fuel energy to make them habitable. Recent legislation and building regulations, however, ensure that designers are contracted to aim for zero carbon sustainability or buildings which function with much lower levels of fossil fuel dependency.Heat pipe technology has found increasing applications in the building service industry...
Nuclear Power Plant (Hungary) is developed in this paper based on first engineering principles that is able to describe the time-varying active and reactive power output of the generator. These generators are required to take part in the reactive power support of the power grid following the demand of a central dispatch center, and also contribute to the frequency control of the grid. The developed...
We discover flaws in the foundations of a recent strand of literature estimating the carbon Kuznets curve (CKC). The CKC hypothesizes that carbon dioxide emissions initially increase with economic growth but that the relationship is eventually reversed. The recent literature attempts to estimate the CKC by adding energy consumption as a control variable. Due to model misspecifications related to the...
The paper presents the application of echo state network (ESN) to short-term load forecasting (STLF) problem in power systems for both 1-h and 24-h ahead predictions while using the least number of inputs: current-hour load, predicted target-hour temperature, and only for 24-h ahead forecasting, day-type index. The study is much attractive due to inclusion of weekends/holidays what makes STLF problem...
In this paper submerged photovoltaic systems (PVSs) are investigated with regard to the efficiency increase of PVS under high irradiance and ambient temperature; in particular, the optical and thermal effects are studied by means of experimental tests and mathematical models. The increment of efficiency through the cooling effects is evaluated. The PV panel performance of a submerged photovoltaic...
The Photovoltaic Water Pumping Systems (PVPS) constitute a potential option to drawdown water in the remote desert locations for domestic usage and livestock watering. However, the widespread of this technique requests an accurate information and experiences on such system sizing and installation. The aim of this work is to determine an optimum Photovoltaic (PV) array configuration, based upon Isofoton...
The experimental validation of a real-time optimization (RTO) strategy for the optimal operation of a solid oxide fuel cell (SOFC) stack is reported in this paper. Unlike many existing studies, the RTO approach presented here utilizes the constraint-adaptation methodology, which assumes that the optimal operating point lies on a set of active constraints and then seeks to satisfy those constraints...
Evaluation of a typical integrated solar absorption cooling system has been carried out to determine its overall performance. Analysis of the results revealed an operational efficiency of 61% for the solar collectors at a mean differential temperature (ΔT) of 51 °C as compared with the manufacturer’s rating of 70% at a ΔT of 60 °C. The absorption chiller did however perform quite satisfactorily and...
Understanding the friction losses of automotive turbochargers is a key parameter in assessing properly the mechanical efficiency of these machines. Current turbochargers are mostly equipped with oil bearings: two journal bearings and one double-acting axial thrust bearing. In order to know on which element improvement efforts have to be focused, it is important to determine their contribution to the...
Variable-speed technologies have been adopted to improve the efficiency of electricity generation in wind farms. Among these technologies, doubly-fed induction generators have widely spread and their stability issues have been experienced and analysed. In recent years, permanent-magnet synchronous generators have been also exploited, connected to the grid through full-scale converters, ensuring high...
Nowadays life cycle tools namely; Life Cycle Assessment (LCA), Life Cycle Costing (LCC), and Life Cycle Optimization (LCO) are being used to assess new vehicular structures from sustainability and design for the environment perspectives. This manuscript implements a Life Cycle Assessment (LCA) based design approach to assess the performance of vehicular Body-In-White’s (BIW) through its complete life...
This study revisits the relationship between electricity consumption and economic growth in Pakistan by controlling and investigating the effects of two major production factors – capital and labor. The empirical evidence confirms the cointegration among the variables and indicates that electricity consumption has a positive effect on economic growth. Moreover, bi-directional Granger causality between...
This study investigated the impact of energy consumption and CO 2 emission on GDP (gross domestic product) growth and the financial development in thirty Sub Saharan African Countries. The panel model was used in this study from the period 1980 to 2008. The results showed that energy consumption had played an important role to increase both economic growth and the financial development in...
The oil extraction industry generates two by-products, an aqueous effluent, olive mill wastewater (OMWW) and a solid residue, olive mill solid waste (OMSW). OMWW is considered as the major pollutant in the Mediterranean area causing severe environmental threats. The main problem regarding the disposal of OMWW is to find an environmental and economical viable solution. A new valorisation strategy has...
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