Showing papers in "Applied Energy in 2006"

TL;DR: In this paper, the applicabilities of ANNs for the performance and exhaust-emission values of a diesel engine fueled with biodiesels from different feedstocks and petroleum diesel fuels were investigated.

TL;DR: In this paper, an on-line interactive "energy consumption information system" for motivating energy-saving activities is constructed, and it was installed in nine residential houses, by utilizing data of measured power consumption, ambient and room temperatures before and after installation, and the responses of the residents to the system, its effectiveness was evaluated.

TL;DR: In this paper, the authors describe a benchmarking process for energy efficiency by means of multiple regression analysis, where the relationship between energy-use intensities (EUIs) and the explanatory factors (e.g., operating hours) is developed.

TL;DR: In this paper, an aluminum-alloy flat-box type hybrid solar collector functioned as a thermosyphon system was constructed, and the test results indicated that the daily thermal efficiency could reach around 40% when the initial water-temperature in the system is the same as the daily mean ambient temperature.

TL;DR: Results indicate that the model predicts daily total solar-radiation values with a good accuracy of approximately 97% and the mean absolute percentage error is not more than 6%, and the performance of the model was compared with different neural network structures and classical models.

TL;DR: In this article, the authors quantified the possible impacts of urban heat island countermeasures on buildings' energy use during summer in Tokyo metropolis, considering the dependency of the buildings air temperature upon the local urban canopy structure.

TL;DR: In this article, the authors presented a load model, which incorporates the characteristics of batch-type loads common to any type of process industry, coupled with an optimisation formulation utilising integer programming for minimising the total electricity-cost satisfying production, process flow and storage constraints for different tariff structures.

TL;DR: In this paper, the authors present a deterministic approach of determining the likely visual impact on landscapes and population, taking into account that there is no clear threshold for perceived adverse visual-impact.

TL;DR: In this article, the performance of a reduced NdCoO 3 perovskite-type mixed metal oxide catalyst (Co dispersed on Nd 2 O 3 ) is investigated for carbon-free CO 2 reforming combined with steam reforming or partial oxidation of methane to syngas.

TL;DR: The economic and political realities of the 1990s forced managers to reverse long-standing organizational cultures in order to reduce costs and energy expenditures in their organisations as discussed by the authors, and these can be achieved, with respect to maintenance, by replacing a reactive repair-focused attitude by a proactive reliability-focused culture.

TL;DR: In this paper, an absorption power/cooling combined cycle is proposed, and a thermodynamic analysis of the cycle is performed using log p-T, log p -h and T-s diagrams, based upon two performance criteria, the overall thermal efficiency and exergy efficiency, the cycle has been analyzed by means of a simulation.

TL;DR: In this paper, a number of prototype thermoelectric refrigerators are investigated and their cooling performances evaluated in terms of the coefficient-of-performance, heat-pumping capacity and cooling-down rate.

TL;DR: In this paper, a sliding mode controller for the single-phase grid-connected photovoltaic system has been proposed, which consists of maximum power point tracker (MPPT) controller and sliding mode current controller only.

TL;DR: A novel method integrating rough sets (RS) theory and an artificial neural network (ANN) based on data-fusion technique is presented to forecast an air-conditioning load, showing that, the MRAN forecasting model is better than the individual RSAN and moving average (AMIMA) ones, whose relative error is within 4%.

TL;DR: In this article, a thermoelectric (TE) power module was used to charge a battery charger with a SEPIC dc-dc converter with the maximum power point tracking (MPPT) feature.

TL;DR: In this paper, four different roofs were used to assess the impacts of building integrated photovoltaics (BIPV) on the building's heating and cooling loads; namely, ventilated air-gap BIPV, non-ventilated (closed) air gap BIPVM, closeroof mounted BIPM, and the conventional roof with no PV and no air gap.

TL;DR: In this paper, the authors analyzed a municipal district-heating system, which uses waste heat from industries and waste incineration as a source of heat for residential and commercial use.

TL;DR: In this paper, a combination of treatments, consisting of the application of fertilizers and oxygen exposure, was evaluated in situ during a period of six weeks, where conditions of a major spill were simulated by sprinkling crude-oil on experimental cells containing agricultural soil.

TL;DR: In this paper, an on-line interactive "energyconsumption information system" that displays power consumptions of, at most, 18 different appliances, power and city-gas consumption of the whole house and room temperature, for the purpose of motivating energy-saving activities has been constructed and the effectiveness of the system investigated by installing it in 10 residential buildings.

TL;DR: In this article, the authors investigated the short and long-run causality issues between coal consumption and economic growth in Korea by applying modern time-series techniques and found that there exists a bi-directional causality running from coal consumption to economic growth with feedback.

TL;DR: In this paper, the relation between thermal efficiency, compression and expansion ratios for an ideal naturally-aspirated (air-standard) Miller cycle have been derived using finite-time thermodynamics.

TL;DR: In this article, the authors describe a numerical study of the radiation-natural convection interactions in a differentially-heated cavity with an inner body, and the SIMPLER algorithm for the pressure-velocity coupling is adopted.

TL;DR: In this article, the authors compared non-linear autoregressive Markov regime switching models with an ordinary linear autoregression model with regard to their forecast performances, and the results of the study suggest that Markov regimes switching models provide better forecasts than linear models.

TL;DR: In this article, the possibilities for integrating even more wind power using new power balancing strategies that exploit the possibilities given by the existence of CHP plants as well as the potential impact of heat pumps used for district heating and installed for integration purposes are analyzed.

TL;DR: In this paper, a complete sizing model, based on a long-term energy production cost analysis, is developed, able to predict the optimum configuration of a hybrid wind-diesel stand-alone system on the basis of minimum longterm cost.

TL;DR: In this paper, the authors investigate experimentally and theoretically whether sodium carbonate (Na2CO3) salt is suitable for establishing a salinity gradient in a salt-gradient solar-pond (SGSP).

TL;DR: In this article, a concrete wall externally insulated with six expanded polystyrene boards, each containing three vacuum insulation panels, was investigated both experimentally and numerically, and a functional representation of the measured data, for steady-state conditions, is introduced.

TL;DR: In this paper, a study of the use of activated carbon (AC) in the clean up was undertaken with the aim of reducing the water contamination to a more acceptable level, which revealed that the powdered form of AC would be very effective in the remediation of petroleum-hydrocarbon contaminated ground water.

TL;DR: In this article, a numerical heat-transfer and pressure-drop analysis for porous rings inserted in a pipe at a distance L apart is presented, where a constant heat-flux is applied to the outer surface of the pipe.

TL;DR: In this paper, a performance optimization based on the ecological coefficient of performance (ECOP) criterion has been carried out for an irreversible regenerative Brayton heat-engine, and the results obtained were compared with those using the power-output criterion and alternative ecological performance objective-function defined in the literature.