Showing papers in "Energy Conversion and Management in 2010"

TL;DR: In this article, the authors provide a description of the emerging biorefinery concept, in comparison with the current oil refinery, as well as discussion of the most important biomass feedstocks, conversion technologies and final products.

TL;DR: In this article, the authors provide an overview of the principles, reactions, and applications of four fundamental thermo-chemical processes (combustion, pyrolysis, gasification, and liquefaction) for bioenergy production, as well as recent developments in these technologies.

TL;DR: In this paper, the authors present the historical background, classification, construction, modeling, testing, and voltage balancing of the EDLC technology, and their applications in electrical vehicles, power quality, and others are also discussed.

TL;DR: In this article, the authors investigate the algae production technologies such as open, closed and hybrid systems, production costs, and algal energy conversions, in order to investigate the potential of algae as a promising source of biodiesel.

TL;DR: In this article, an experimental investigation is conducted to evaluate the effects of using blends of n-butanol (normal butanol) with conventional diesel fuel, with 8, 16% and 24% (by volume) nbutanol, on the performance and exhaust emissions of a standard, fully instrumented, four-stroke, high-speed, direct injection (DI), Ricardo/Cussons ‘Hydra’ diesel engine located at the authors' laboratory.

TL;DR: In this paper, the activation energy and reaction model of the pyrolysis of high density polyethylene (HDPE), low density polyylene (LDPE) and polypropylene (PP) have been estimated from non-isothermal kinetic results.

TL;DR: In this paper, the effects of biodiesel addition to diesel fuel on the performance, emissions and combustion characteristics of a naturally-aspirated DI compression ignition engine were examined, and a minor increase in brake specific fuel consumption (BSFC) and decrease in brake thermal efficiency (BTE) for biodiesel and its blends were observed compared with diesel fuel.

TL;DR: In this article, the authors considered the case in which the thermal energy required by a solar ORC is supplied by means of stationary solar collectors and derived the operating conditions of the ORC that minimizes the aperture area needed per unit of mechanical power output for every working fluid and every solar collector.

TL;DR: In this paper, an automatic supervision and fault detection procedure for PV systems, based on the power losses analysis, has been presented, which includes parameter extraction techniques to calculate main PV system parameters from monitoring data, taking into account the environmental irradiance and module temperature evolution.

TL;DR: In this paper, the authors investigated the thin-layer drying characteristics in solar dryer with forced convection and under open sun with natural convection of mint leaves, and performed energy analysis and exergy analysis of solar drying process.

TL;DR: In this article, a set of CFD simulations for a single shell and single tube pass heat exchanger with a variable number of baffles and turbulent flow were performed, and the best turbulence model among the ones considered was determined by comparing the CFD results of heat transfer coefficient, outlet temperature and pressure drop with the Bell-Delaware method results.

TL;DR: In this article, the performance of an engine together with its effect on environment were tested when engine was powered by both pure diesel and emulsified fuel with various quantities of water content in the diesel fuel.

TL;DR: In this article, the authors used biogas in a HCCI engine with charge temperature and amount of diesel injected into the intake manifold being used to control combustion, and the best energy ratio was 50%.

TL;DR: In this article, a two-step acid-esterification and base-transesterification process was further used for biodiesel production from Jatropha oil, and stable and clear yellowish biodiesel was obtained with 964% yield after reaction for 05 h.

TL;DR: In this paper, a hybrid solar dryer was designed and constructed using direct solar energy and a heat exchanger, which consists of solar collector, reflector, heat exchange unit and drying chamber.

TL;DR: In this paper, the authors address the problem of optimal design of trigeneration plants and discuss the factors that affect the operation and the feasibility of investment, including the effect of various operation parameters and energy tariffs structures.

TL;DR: In this paper, an attempt was made to develop multiple regression models for office buildings in the five major climates in China, where a total of 12 key building design variables were identified through parametric and sensitivity analysis, and considered as inputs in the regression models.

TL;DR: In this article, a novel optimization algorithm based on imperialist competitive algorithm (ICA) is used for the design of a low speed single sided linear induction motor (LIM), which is used increasingly in industrial process specially in transportation systems.

TL;DR: In this paper, a comprehensive evaluation on probability density functions for the wind speed data from five representative sites in North Dakota is presented, including gamma, lognormal, inverse Gaussian, and maximum entropy principle (MEP) derived probability density function (PDFs).

TL;DR: In this paper, a new regressive model based on the sigmoid function and using the clearness index and the relative optical mass as predictors was proposed for the estimation of the hourly diffuse solar irradiation under all sky conditions.

TL;DR: In this paper, the effect of fuel injection timing and intake pressure (naturally aspirated as well as supercharged condition) on the performance of a direct injection (DI) diesel engine is investigated under transient conditions.

TL;DR: In this article, the effects of combined ribs and winglet type vortex generators (WVGs) on forced convection heat transfer and friction loss behaviors for turbulent airflow through a constant heat flux channel are experimentally investigated.

TL;DR: In this paper, three processes have been proposed for dissociation of methane hydrates: thermal stimulation, depressurization, and inhibitor injection, and they have been applied to the hydrate stability zone to raise its temperature, causing the methane hydrate to decompose.

TL;DR: In this article, the effects of the microstructure characteristics of the gas diffusion layer (GDL) and microporous layer (MPL), including pore size distribution, hydrophobic treatment, gas permeability, and other factors, on the water management and performance of a PEM fuel cell were investigated.

TL;DR: In this article, the authors presented new correlations for calculating the elemental composition based on proximate analysis of biomass using 66 data points, and validated by using 20 data points selected from different categories of biomass than that for correlations derivation.

TL;DR: In this article, the authors present a review of the electricity storage technologies relevant for large power systems and present an estimation of the economic feasibility of electricity storage using the west Danish power market area as a case.

TL;DR: In this paper, an adaptive model for predicting hourly global, diffuse and direct solar irradiance is described, and a dataset of measured air temperature, relative humidity, direct, diffuse, and global horizontal irradiance for Jeddah site (Saudi Arabia) were used in this study.

TL;DR: In this article, the authors investigated the potential for the application of single effect double effect and triple effect cooling cycles for production chilled water and found that triple effect system generates more vapour refrigerant per unit heat supplied as compared with single effect and double effect systems.

TL;DR: Two solar stills (single slope passive and single slope photovoltaic/thermal (PV/T) active solar still) were fabricated and tested at solar energy park, IIT New Delhi (India) for composite climate as mentioned in this paper.

TL;DR: The experimental results demonstrate that the model proposed outperforms the existing neural-network approaches, the traditional ARIMA models and other hybrid models based on the root mean square error and mean absolute percentage error.