Showing papers in "Renewable Energy in 1993"

TL;DR: In this paper, the effects of dust accumulation on the surface of photovoltaic cells were experimentally investigated, and the effect of dust deposition density on the short circuit current, output power and the fill factor was determined and discussed.

TL;DR: In this paper, a system was developed for producing high yields of a biomass rich in proteins and low in polymeric carbohydrates from the halophilic alga Dunaliella grown in saline water.

TL;DR: In this paper, various practical approaches to calculating the solar irradiation for an inclined surface are reviewed, assuming that the direct and diffuse irradiation are available, either as measured or calculated values.

TL;DR: In this article, a liquid desiccant system (using CaCl2) is presented for air dehumidification using solar energy or any other low grade energy to power the system.

TL;DR: In this article, a modified cost-benefit analysis of Ocean Thermal Energy Conversion (OTEC) is presented to indicate under what economic circumtances OTEC, currently only competitive in a few remote islands, may become more widely competitive in the near future.

TL;DR: A review of the topic including the physics of the greenhouse effect is given in this article, where the authors suggest that reducing use of fossil fuels and increasing use of alternative sources of energy coupled with energy conservation strategies are needed to reduce emissions of greenhouse gases.

TL;DR: In this paper, a single-basin solar still having a base area of 1.5 m2 (1.5m × 1.0 m) was designed and fabricated from galvanized steel sheet with an inclined glass cover.

TL;DR: Various approaches to the calculation of solar radiation at the earth's surface using satellite data are reviewed, which range from qualitative and subjective use of hard copy satellite images at low spatial and temporal resolution to the use of high resolution digital data and spectral radiative transfer models.

TL;DR: In this paper, the monthly average daily totals of global solar radiation on a horizontal surface at Madras (13°0′N, 80°11′E) and Kodaikanal during the period 1983-1987 have been processed, analysed and presented.

TL;DR: In this article, the frequency of occurrence of various solar radiation patterns observed over a 5-year period is derived for Bangi (2°56′7.3″N, 105°47′0.2″E), Malaysia.

TL;DR: From direct radiation measurements performed in Valencia, the Angstrom's turbidity coefficient, β, was derived and compared with the models reported for Avignon, Ajaccio and Dhahran as discussed by the authors.

TL;DR: In this paper, the basic geometrical optics equations for multifaceted paraboloidal dish solar collectors are presented in the form helpful for engineering design, and trade-off strategies are discussed to establish a balance between many constraining factors related to system cost, survival, reliability and lifetime properties.

TL;DR: In this paper, the physical basis of the numerical modelling of climate is outlined, using atmospheric models as an example and the use and verification of climate models is described, illustrated with data from simulations made with Meteoroligcal Office models.

TL;DR: In this article, the authors established correlations for the estimation of the direct, global and diffuse radiation from the sunshine duration, n, or the clearness index, K t, based on the measurements of the solar radiation components in Rabat.

TL;DR: Exploitation of biogas is scrutinized in Latin America as discussed by the authors, where the number of digesters has been identified in the agricultural sector and 25 types of wastes have been either investigated or are already in full-scale application, and Latin America is now the world's leading user of Biogas technology in the municipal raw sewage treatment thirty-three R&D projects have been reported.

TL;DR: The proposed methods for climate analysis and modelling (CMY and MYCM) are combined with the Mahony Tables and the Building Bioclimatic Chart in order to produce more accurate designs to consider the four climate zones of Saudi Arabia.

TL;DR: In this paper, the effect of varying the air, liquid flow rates and bed geometry on the performance of a packed bed dehumidifier was studied in addition to studying the effect due to varying air and liquid desiccant inlet coditions.

TL;DR: In this article, the adsorptive properties of activated charcoal/methanol combinations were measured in the laboratory and the Dubinin-Astakhov equation was used to analyze the data, and pressure-temperature-concentration diagrams were given.

TL;DR: In this paper, the authors introduced a new model to estimate the monthly mean solar global irradiation, H, consisting of six parameters (astronomical and meteorological) for Bahrain to within 7% on average.

TL;DR: In this paper, the authors investigated the thermal performance of a focussing-type solar cooker for different orientations of the paraboloied reflector and determined the heat loss factore for a cooker with/without reflector for no-wind conditions.

TL;DR: In this article, a three dimensional analytical model to compute the deflection, stresses, and eigen values in the rotor blades is proposed using bending triangular plate finite element, both membrane and bending stiffness are considered in deriving the element stiffness matrix.

TL;DR: In this paper, the authors proposed coupling the absorption cycle to the organic Rankine cycle (ORC) driven by a low temperature geothermal heat source have been evaluated, and computer simulations have been done to predict the performances of the combined cycles (AHT-ORC and ORC-VAC) as well as the conventional ORC.

TL;DR: In this article, a technical and economic assessment of the generation of electricity by assuming instillation wind generators is made for two sites in Bahrain: System Control Distribution Station (SCD) and Bahrain International Airport (BIA).

TL;DR: In this paper, the use of climate models to understand and predict climate change is described, using examples from numerical studies of the effects of enhanced atmospheric CO2, and the authors use this model to predict the future of climate change.

TL;DR: In this article, the errors of estimating solar radiation from sunshine hour measurements using Angstrom's relation are evaluated, and other Angstrom correlation relations are also proposed by classifying the stations under into four groups.

TL;DR: In this article, a new MPPT converter topology, based on the Parallel Power Conversion Technique (PPCT), which enhances the energy conversion efficiency in the PV system, is described, analyzed and experimentally evaluated.

TL;DR: A comparison of two simple methods of estimating the total solar radiation has been made from which the maximum-likelihood quadratic fit method has been found to predict within ±5% mean absolute deviation for the three locations studied in Nigeria.

TL;DR: In this article, the authors analyse the impact of the taxation on the emissions of CO 2 in the context of the fashion industry and propose a modelisation of the cout de l'effet de serre and its impact on the foret.

TL;DR: In this paper, the effects of saline water depth, insulation thickness and wind speed on the still productivity were evaluated, and it was shown that the productivity of the still strongly depends on the solar radiation and ambient temperature.

TL;DR: In this article, a solar-heated rubber sheet dryer was developed, which consists of a flat-plate solar air heater connected to a drying chamber, leading to the desired drying air temperature of 45-60°C and results in a significant reduction of the drying time.