Showing papers in "Energy Conversion and Management in 2007"

TL;DR: In this paper, the physicochemical properties and characteristics of the components and compositions of biomass pyrolysis oil have been discussed with some suggestions on upgrading and applications of bio-oil in the decades.

TL;DR: In this article, the operating envelope, fuel economy, emissions, cycle-to-cycle variations in indicated mean effective pressure and strategies to achieve stable combustion of lean burn natural gas engines are highlighted.

TL;DR: In this paper, the system performance analysis and optimization of an organic Rankine cycle (ORC) system using HFC-245fa (1,1, 1,3, 3,3-pentafluoropropane) as working fluid driven by exhaust heat is presented.

TL;DR: In this paper, a two-step catalyzed process was adopted to prepare biodiesel from waste cooking oil whose acid value was 75.92 − 0.036 ǫmgKOH/g.

TL;DR: In this paper, a state variable model for Li-ion battery discharge/charge behavior is presented. But the model is based on a nonlinear CFD model of a 6 Ah battery and the model output equation is derived on a local, electrode-averaged and distributed basis.

TL;DR: In this article, the authors used TBAB as an additive to make the hydrate crystallization condition milder, which made it more suitable for CO2 capture from a gas mixture.

TL;DR: In this paper, the authors used coupled fluid flow and geomechanical fault slip analysis to estimate the maximum sustainable CO2 injection pressure during geological sequestration of CO2, and concluded that a fully couplednumerical analysis can more accurately account for the spatial evolution of both insitu stresses and fluid pressure.

TL;DR: In this article, pendant drop measurements of IFTs between water and CO2 in a range of temperatures (308-383 K) and pressures (5-45 K) relevant to CO2 storage in deep geological formations are presented.

TL;DR: In this article, the authors isolated the microalgae Scenedesmus obliquus and Chlorella kessleri from waste treatment ponds of the Presidente Medici coal fired thermoelectric power plant in the Southernmost Brazilian state of Rio Grande do Sul and investigated their growth characteristics when exposed to different concentrations of CO 2.

TL;DR: In this paper, a mathematical model for the thermochemical processes in a downdraft biomass gasifier is presented, combining the chemical equilibrium and the thermodynamic equilibrium of the global reaction, predicting the final composition of the producer gas as well as its reaction temperature.

TL;DR: In this paper, the performance of single and mixed amine-based absorbents for CO2 capture at 40°C and 120°C was compared with aqueous 2.9m AEEA and 5.0m MEA absorbents, respectively.

TL;DR: In this paper, a critical review of the recent combustion advancements made in gasoline engines for the reduction of fuel consumption and engine-out emissions, and the technologies associated with these advancements are presented.

TL;DR: In this article, the authors proposed that renewable energy can facilitate economic and social development in communities but only if the projects are intelligently designed and carefully planned with local input and cooperation.

TL;DR: In this article, the characteristics of biomass gasification gas, such as H(2)/CO and tar yield, as well as its potential for liquid fuel synthesis is explored. And the results indicate that an appropriate temperature (750 degrees C for the current study) and more catalyst are favorable for getting a higher H( 2)/CO ratio.

TL;DR: In this article, Sunflower seed oil was subjected to the transesterification reaction with calcium oxide (CaO) in supercritical methanol for obtaining biodiesel for obtaining soybean oil to alcohol.

TL;DR: In this paper, an electrochemical model was developed to study the currentvoltage (J − V ) characteristics of a solid oxide fuel cell (SOFC), where the Butler-Volmer equation, Fick's model and Ohm's law were used to determine the activation, concentration and ohmic overpotentials, respectively.

TL;DR: In this article, the authors present the numerical results of two CO2 injection scenarios, first with CO2-saturated water and secondly with pure supercritical CO2, which confirm the high reactivity of CO2 saturated water, which can dramatically damage the reservoir structure.

TL;DR: ECO2N as mentioned in this paper is a fluid property module for the TOUGH2 simulator that was designed for applications involving geologic storage of CO2 in saline aquifers, including a comprehensive description of the thermodynamics and thermophysical properties of H2O-NaCl-CO2 mixtures, that reproduces fluid properties largely within experimental error for the temperature, pressure and salinity conditions of interest.

TL;DR: In this article, the authors investigated the amount of input-output energy used in dry apricot production, to investigate the efficiency of energy consumption and to make an economic analysis of dry apriciot production in Malatya, Turkey.

TL;DR: In this article, a concentrating photovoltaic/thermal (CPVT) system operating at elevated temperature is proposed for simultaneous production of electrical and high grade thermal energy, and the performance and cost of a CPVT system with single effect absorption cooling are investigated in detail.

TL;DR: Two CPSO methods based on the logistic equation and the Tent equation are presented to solve economic dispatch (ED) problems with generator constraints and applied in two power system cases.

TL;DR: In this paper, the computational fluid dynamics (CFD) code, FLUENT, is employed to predict the flow phenomena and performance of CPM and CMA steam ejectors.

TL;DR: In this article, the melting and solidification processes of paraffin as a phase change material (PCM) in a tube in shell heat exchanger system were investigated. But the authors focused on the possibility of the heat transfer enhancement in the heat storage geometry, which is achieved by tilting the outer surface of the storage container.

TL;DR: In this article, the authors evaluate the gas production potential of disperse, low-saturation (SH < 0.1) hydrate accumulations in oceanicsediments using numerical simulation and conclude that despite wide variations in theaforementioned parameters (covering the entire spectrum of suchdeposits), gas production is very limited, never exceeding a few thousandcubic meters of gas during the 10-year production period.

TL;DR: In this paper, the authors applied different particle swarm optimization (PSO) techniques to solve the short-term hydro-thermal scheduling problem, such as power balance, water balance, reservoir volume limits and operation limits of hydro and thermal plants.

TL;DR: In this article, the use of electrochemical reduction of CO 2 at a copper electrode to a hydrocarbon mixture looks like a promising technology, especially when applied to upgrading biogases.

TL;DR: In this article, a cost evaluation of CO2 sequestration by aqueous mineral carbonation has been made using either wollastonite (CaSiO3) or steel slag as feedstock.

TL;DR: In this article, the principles of thermal plasma pyrolysis processes are outlined and a discussion of recent research activities about organic waste treatment using thermal plasminization technology is discussed.

TL;DR: In this article, the authors use characteristic curves to represent the interactions of nonwetting-phase CO 2 and wetting-phase brine and show the role of heterogeneity within the storage formation.

TL;DR: In this article, olivine was used as a substrate for various catalyst formulations designed to steam reform biomass tar to gas, and the effect of catalyst composition on tar conversion and yields of various product gases were determined.