Showing papers in "Applied Energy in 2007"

TL;DR: In this paper, the operating current of a 120-W mono-crystalline photovoltaic module using four-and five-parameter analytical models is analyzed and validated based on a series of experimental measurements.

TL;DR: Based on the I-V curves of a photovoltaic (PV) module, a novel and simple model is proposed in this article to predict the PV module performance for engineering applications.

TL;DR: In this article, the potential for passive cooling of buildings by night-time ventilation was evaluated by analysing climatic data, without considering any building-specific parameters, and the results showed a high potential for nighttime ventilative cooling over the whole of Northern Europe and still significant potential in Central, Eastern and even some regions of Southern Europe.

TL;DR: In this article, a flat-box aluminum-alloy photovoltaic and water-heating system designed for natural circulation was constructed, which was an integration of single-crystalline silicon cells into a solar thermal collector.

TL;DR: In this paper, the solubilities of ammonia in room-temperature ionic liquids, such as 1-ethyl-3-methylimidazolium acetate, N,N-dimethylethanolammonium acyclic acid (N,N) acetate have been measured for the first time.

TL;DR: In this article, the main developments over the past 30 years are sketched in a perspective that puts an emphasis on standardization and scientific consensus creation, and a logical next development: a closer cooperation and harmonization with the domain of energy analysis, and an expected growing interest from the energy-application side.

TL;DR: In this article, the authors describe exploratory analyses of domestic electricity profiles recorded at a high time resolution of 1 min on eight houses, including a detailed analysis of the effects of time averaging.

TL;DR: In this article, the authors used CFD modeling techniques to assess the impacts of inclination angle, double glazing and low-emissivity finish on the induced ventilation rate of a solar chimney.

TL;DR: In this article, two types of solar air-heaters with cross-corrugated absorbing and bottom plates are considered and the thermal performance of these three types of heaters are analyzed, measured and compared under several configurations and operating conditions.

TL;DR: In this paper, a simple model for estimating the daily global radiation is developed based on a trigonometric function, which has only one independent parameter, namely the day of the year.

TL;DR: In this article, an optimization of biogas production from olive-mill wastewater (OMW) was attempted by codigesting with diluted poultry-manure (DPM) at mesophilic conditions.

TL;DR: Analysis of data from a national survey of dwellings and households in England occupied by low-income residents that had received heating improvements or repairs under the Warm Front Scheme reveals those preferring lower temperatures for health or other reasons, report less anxiety and depression than those with limited control over their home environment.

TL;DR: In this paper, a detailed thermodynamic model for a refrigerator based on an irreversible Carnot cycle is developed with the focus on forced-air heat exchangers, and a multi-objective optimization procedure is implemented to find optimal design values for design variables.

TL;DR: In this article, the effects of temperature difference and pressure loss in the gas-to-air heat exchanger on cycle efficiency and power of an externally-fired gas turbine were investigated.

TL;DR: In this article, the authors examined the likely trend in the demand for electricity over the next 25 years under the assumptions that there is a rapid economic development such that Nigeria transforms from low- to middle-income economy during this period, Nigeria meets the millennium development goals (MDG) in AD 2015, and the country achieves the status of an industrializing nation.

TL;DR: In this paper, the optimal performance for a class of generalized irreversible universal steady-flow heat-engine cycle models, consisting of two heating branches, two cooling branches and two adiabatic branches, with losses due to heat-resistance, heat leaks and internal irreversibility was analyzed using finite-time thermodynamics.

TL;DR: In this paper, the authors reported a much higher selectivity (about 30-300) for CO2/H2 separation using room-temperature ionic liquid solvents, which can be regarded, from the point of view of sorbents, as solid materials.

TL;DR: In this paper, the authors investigated the shading effects due to nearby obstructions when daylighting schemes are being employed and found that shading effects strongly affect the building's energy budget when using daylighting designs.

TL;DR: The work of van Gool and others researchers who laid down the foundations of industrial energy analysis is reviewed in this paper, where the scope for increasing energy efficiency and the extent of exergetic "improvement potential" are examined.

TL;DR: In this article, performances of two pure hydrocarbons and seven mixtures composed of propylene, propane, HFC152a, and dimethylether were measured to substitute for HCFC22 in residential air-conditioners and heat pumps.

TL;DR: In this article, a three-layer back-propagation neural-network applied Levenberg-Marquardt algorithm is presented and discussed to overcome the difficulties due to a lack of information about stage-by-stage axial-compressor performance.

TL;DR: In this article, a method is proposed for estimating the electricity consumption and associated carbon emissions of a defined electrical-lighting configuration in an office building, accounting for the daylight contribution from windows and rooflights.

TL;DR: In this paper, a very specific coefficient-of-performance has been defined to optimize this trade-off, and the simulation of the cycle was carried out in the process simulator ASPEN Plus and the optimum operating conditions have been found by using the Equation Oriented mode of the simulator and some of the results have been compared with the experimental data obtained from the cycle.

TL;DR: In this paper, an approach for the integration of RAMS and risk analysis can be developed as a guide in maintenance policies for the Afam thermal power station, in order to reduce the frequency of failures and maintenance costs.

TL;DR: In this article, the impact of axially swept and tangentially leaned blades on the aerodynamic behavior of transonic axial-flow compressor rotors was analyzed separately, and the overall features of three-dimensional shock structure, shock-boundary layer interaction, and wake development were calculated well by the numerical solution.

TL;DR: In this paper, the authors used a CLOHP/CV with inner diameters of 1.77 and 2.03 millimeters and showed that the heat transfer rate increases with an increase of Rcv and decreases with an increased aspect ratio.

TL;DR: In this article, the potential of thermoeconomics for the analysis of CHCP applications in buildings is explored; two main procedures to address the problem are presented, a simplified design optimization and a detailed integrated optimization of plant lay-out and operation.

TL;DR: In this article, waste collected from different receptacles and dumpsites in Port Harcourt metropolis was subjected to analysis: on average, it consisted of 66.6% volatile solids, 13.5% fixed solids and 19.1% liquid and 0.8% other components.

TL;DR: In this article, the authors argue that humans are facing an escalating threat of global warming and there is increasing evidence that this is due to human activity and increased emissions of carbon dioxide.

TL;DR: In this article, the performance variations of a solar-powered ejector cooling system (SECS) using an evacuated-tube collector are presented for Antalya, Aydin, Konya and Urfa cities located in the southern region of Turkey by means of hourly and monthly average ambient temperature and solar radiation meteorological data.