Showing papers in "Energy Conversion and Management in 2000"

TL;DR: In the liquefaction process, the micellar-like broken down fragments produced by hydrolysis are degraded to smaller compounds by dehydration, dehydrogenation, deoxygenation and decarboxylation as mentioned in this paper.

TL;DR: In this article, a systematic approach is proposed for the assessment and selection of method and sites for CO2 sequestration in geological media, and the range of sedimentary basins suitable for CO 2 sequestration is significantly reduced if these criteria and climatic conditions, accessibility, infrastructure and cost of CO2 capture and injection are taken into account.

TL;DR: In this article, an extensive investigation of the thermal, electrical, hydraulic and overall performances of flat plate photovoltaic/thermal (PV/T) air collectors has been made.

TL;DR: In this paper, two types of enhancement techniques were studied: randomly oriented fibers and a fiber brush for enhancing the thermal conductivities of energy storage media, and the results showed that the fiber brush increases the effective thermal conductivity to the maximum values predicted which is theoretically.

TL;DR: In this paper, the effects of ethanol fumigation (i.e., the addition of ethanol to the intake air manifold) and ethanol-diesel fuel blends on the performance and emissions of a single cylinder diesel engine have been investigated experimentally and compared.

TL;DR: In this paper, the characteristics of promising energy storage systems by pumped hydro, compressed air, secondary batteries, superconducting magnet, flywheel or capacitors have been surveyed and discussed.

TL;DR: In this paper, the authors presented a new computer program for nonintrusive disaggregation of the total electricity consumption of a house into the major end uses, and the program has two modes: sampling and evaluation.

TL;DR: In this paper, the main parameters affecting solar still performance under the weather conditions of the Suez Gulf area are investigated and a general equation is developed to predict the daily productivity of a single sloped solar still.

TL;DR: In this article, the effect of pilot fuel quantity on the performance of an indirect injection diesel engine fuelled with gaseous fuel was investigated on a special single cylinder compression ignition research engine (Ricardo E6).

TL;DR: In this paper, a double pass photovoltaic thermal solar collector suitable for solar drying applications has been developed and tested, and a steady state closed form solution to determine the outlet and mean photiovoltaic panel temperature has been obtained for the differential equations of the upper and lower channels of the collector.

TL;DR: In this article, the authors used a basin type solar still with various cover tilt angles of 15, 25, 35, 45, 55 and 55° to study the effect of salinity of water on solar distillation.

TL;DR: In this paper, a PCM storage unit for a solar cooker was designed and developed to store solar energy during sunshine hours, which was used to cook food in the evening using commercial grade acetamide as a latent heat storage material.

TL;DR: In this article, the design, development and performance characteristics of a low-cost solar steam generating system which incorporates recent design and materials innovations of parabolic dish technology are presented, and the concentrator is a deep dish of rather imperfect optics, made of silvered polymer reflectors fitted in the aluminum frame of a satellite communication dish.

TL;DR: In this article, the authors compared statistical error tests using the mean percentage error (MPE), root mean square error (RMSE), and the mean bias error (MBE) for computing the monthly average daily global radiation on a horizontal surface.

TL;DR: In this article, the authors investigated the possibility of establishing monthly-specific equations for estimating global solar radiation across Sudan using data from 16 stations, stretching along sub-humid, semi-arid, arid and hyperarid zones.

TL;DR: In this article, the authors estimate the energy content of municipal solid waste (MSW) generated in Jordan based on its physical composition and show that the average energy content is 2747 kcal/kg.

TL;DR: In this paper, a predictive model for an adsorption solar cooling system using the activated carbon-methanol pair and its numerical simulation are presented, which accounts for instantaneous heat and mass transfers in each one of the machine components along a characteristic average day for each month.

TL;DR: In this article, a two-stage solar energy concentrator with a primary one axis parabolic trough concentrator and a second stage compound parabolic concentrator mounted at the focus of the primary was designed to tolerate tracking misalignment, maintain temperature gradients to suit thermoelectric generation and minimize heat losses.

TL;DR: In this paper, nine species of biomass with different lignin contents were liquefied by water in an autoclave at non-catalytic and catalytic runs.

TL;DR: In this paper, the effect of wind speed V on the daily productivity Pd of some designs of basin type and vertical solar stills is investigated by computer simulation, and numerical calculations have been performed on typical summer and winter days in Tanta in order to correlate Pd with V for different masses of basin water mw for basin type stills and various thicknesses of flowing water dw for the vertical still.

TL;DR: In this paper, a novel approach is proposed for short-term electrical load forecasting by combining the wavelet transform and neural networks, which decomposes the historical load into an approximate part associated with low frequencies and several detail parts associated with high frequencies.

TL;DR: In this article, an improved theoretical model of a thermoelectric module is developed which takes into account both the electrical and thermal contact resistances, and the model is used to investigate the effect of thermoelement length on the module's coefficient of performance (COP) and heat pumping capacity.

TL;DR: In this article, a single slope single basin solar still with baffle suspended absorber (SBSSBA) was designed and fabricated using locally available materials, and a transient mathematical model was presented for the still.

TL;DR: In this article, the effects of drying air velocity, temperature, drying air and air moisture content on the drying kinetics of verbena in a laboratory drying tunnel working by forced convection were investigated.

TL;DR: In this article, the authors presented a numerical study of the solidification of a pcm enclosed in a spherical shell, based on pure conduction in the pcm subject to boundary conditions of constant temperature or convection heat transfer on the external surface of the spherical shell.

TL;DR: In this article, the aerodynamic design of a small wind turbine is discussed and implemented in a grid-connected pitch-controlled machine, and a static proof load test indicated that this blade could withstand loads ten times the normal working thrust, and field performance test showed that the rotor blade has a 41.2% measured average power coefficient.

TL;DR: In this article, a two-zone variable air volume heating system consisting of a 4-ton heat pump, a storage tank, water and air flow networks and two environmental zones is considered.

TL;DR: In this paper, a combined approach of the Meteorological Radiation Model (MRM) and Cloud Cover Radiation Models (CRM) has been proposed to estimate solar irradiation under overcast conditions.

TL;DR: In this paper, the authors present the household electricity use for air conditioning in the residential sector in Hong Kong during the 26 year period from 1971 to 1996, and use computer simulation techniques to estimate the likely energy savings from two energy efficient measures, such as tinted glass to reduce solar heat and the application of thermal insulation to the external walls to lower heat conduction.

TL;DR: In this article, a performance analysis based on the thermoeconomic criterion has been performed for an irreversible refrigerator and a heat pump by using finite time thermodynamic theory, and the optimal performances and design parameters which maximize the objective functions are investigated.