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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

The performance and optimisation of autonomous renewable energy systems

Morgan, Tomos Rhys January 1996 (has links)
No description available.
92

Solar energy and existing UK housing stock : Access to the sun as built form determinant and the potential for solar energy collection with particular reference to pre-1919 housing

Sedgwick, P. J. S. January 1985 (has links)
No description available.
93

An experimental and theoretical investigation of a wick-type solar still for water desalination

Mahdi, Jassim Talib January 1992 (has links)
Solar distillation using a wick-type solar still was investigated theoretically and experimentally. A tilled flat plate wick-type solar still was designed and constructed. Charcoal cloth was used as an absorber/evaporator material and for saline water transport. A theoretical model for the performance of the wick-type solar still has been developed and analysed. It investigates the effect of various factors on the still productivity. A Fortran computer program has been developed and a finite difference technique was used to solve the main equations and to determine related parameters. Indoor experimental testing was carried out to investigate the effect of input water flow rate and salinity on the still productivity together with the variation of the solar still efficiency with absorber temperature. The tests were conducted using the irradiance from a lamp array. Outdoor testing was carried out with and without a V-trough solar concentrator on clear days in summer and winter. Representative daily efficiencies of the still with and without the solar concentrator were about 60% and 50% respectively on clear days in summer. The solar absorptances of samples of charcoal cloth and blackened hessian cloth were determined before and after environmental exposure. The solar reflectances of samples of 3M Scotchcal Films and aluminised plastic (as potential reflecting materials for the concentrator mirrors) were investigated before and after environmental exposure and also exposure to elevated temperatures and humidities. It has been concluded that: charcoal cloth is a good material for use as an absorber/evaporator and also as a water transport medium. Increase of the input water mass flow rate leads to a reduction in the efficiency of the wick-type solar still. The still efficiency decreased linearly with Increase of salinity of the input saline water. The productivity of the still Increases linearly with absorber temperature. The best absorber-cover separation Is found to be in the range 20-25 mm. Wind speed has no significant effect (up to about 10 m/s) on the performance of a well sealed still. The transmittance of the glass cover has a strong influence on the still efficiency. Use of the solar concentrator with the inclined wick-type solar still leads to a greater fractional increase In still productivity on clear days in winter than on clear days in summer.
94

A novel method of production of CdS/CdTe thin film solar cells

Bhatti, Muhammad Tariq January 1993 (has links)
No description available.
95

Studies of the performance of photovoltaic power plant in a Southern African environment

Cuamba, Boaventura Chongo January 1996 (has links)
No description available.
96

Design and analytical evaluation of stand-alone photovoltaic power systems for rural areas in Thailand

Hiranvarodom, Somchai January 2000 (has links)
No description available.
97

Photovoltaics for the Gambia : implementation strategies for renewable energy technology transfer

Able-Thomas, Uriel January 1994 (has links)
No description available.
98

Passive solar energy : modifications of existing masonry walls to improve thermal performance

Boyle, P. M. January 1986 (has links)
Existing brick walls usually have a high U value, one method of improvement is by insulation, but if the wall faces approximately south, it is possible that greater benefits could be obtained by improving the wall's performance as a solar collector. Three solid 225 mm walls were constructed: one glazed, one unglazed, and (since glazing prevents rain penetration) one waterproofed unglazed wall. Two glazed cavity walls were also constructed one glazed with a fan to recover heat from the cavity by forced convection, and one unglazed, with no fan. These walls gave small heat gains. The walls behind the glazing were then insulated on their outer faces, and warm air collected by natural convection. Such a collector was built using a selective surface, a maximum efficiency of about 50% was observed. A theoretical model was developed based on simple steady state theory, this was found to correlate well with experimental data. The theory could be used for any system of low thermal storage, including forced flow collectors. Finally these walls, and others, are compared and their relative merits discussed.
99

The application of solar desalination for water purification in Cyprus

Kalogirou, Soteris A. January 1995 (has links)
No description available.
100

The viability of solar photovoltaics : with specific reference to building integrated photovoltaics cladding systems

Oliver, Mark January 1999 (has links)
No description available.

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