Solar refrigeration for Kenyan rural Communities

Availability of wholesome food products insufficient quantities is a prerequisite for a healthy, productive human population. Refrigeration of perishable foods isoneway of achieving this end. The use of solar powered refrigerators would enhance food preservation in Kenyan remote rural areas where conventional refrigerators either cannot be used or are too expensive. The state-of-the-art of solar refrigeration is reviewed.

Fabrication and characterization of in(oh)xsy modified highly structured tio2/pb(oh)xsy/pedot:pss eta solar cell and study of its transport mechanisms

Light soaking has been found to improve photovoltaic parameters of eta solar cell and those of devices with reduced number of layers. The study forms a basis for; understanding fundamental technologies in solar cell fabrication and characterization which is important for knowledge base and capacity building in area of photovoltaics; and possibility of developing new materials through interfacial diffusion when materials are deposited by either chemical bath deposition SILAR techniques.

Dye sensitized solar cells fabricated from obliquely sputtered nanoprous TiO2 thin films: characterization, electron transport and lifetime studies

Nonoporous titanium dioxide thin films have been obliquely deposited by reactive direct current magnetron sputtering onto conducting glass substrates for dye sensitized solar cell fabrication. The research studies the effect of the underlayer on the performance of the solar cells fabricated from porous films with underlayers.

Thermal performance of some flat plate solar water heaters

Efficiency tests were carried out on four water-heating flat-plate solar collectors (at Kabete campus) using a simple installation. The curve of efficiency (the percentage of solar energy received by the collector that is transferred to the water) against (ti-taj/ I (ti-ta and Ibeing the inlet water temperature, ambient temperature and insolation, respectively) was obtained for each solar collector. These curves are useful both in selecting a suitable solar collector for a given duty and in designing and predicting the performance of a solar water heating system.

Feasibility Of Small Scale Production Of Solar Dried Potato (solanum Tuberosum) Flour And Its Potential Food Uses In Kenya

The main aim of this study was to develop a simple and low-cost process for production of an acceptable potato flour, and to identify its potential food uses in Kenya. Sulphited raw potato slices, sulphited blanched potato slices and cooked potato shreds, all from the variety Desiree were each dried in three potentially commercial natural air convection solar driers with the aim of establishing the most appropriate drier and best pre-treatment of potatoes for production of flour.

Effects of bean planting density and planting time on growth and yields of maize and beans in an . intercropping system

Intercropping is a farming practice that has recently received attention from agronomists as a means of improving land use efficiency. This study was conducted to determine whether manipulating bean density and planting time could have any effects on the growth and final yield of intercropped maize and beans. The effects of bean density and planting time on bean nodulation, soil nitrogen levels, growth and final yields of maize and beans under intercropping system was investigated at the University of Nairobi, Kabete campus field station, on reddish brown nitosol clay.

Performance of a parabolic trough collector Air heater

A low cost parabolic trough concentrator (PTC) was built at the Mechanical Engineering workshop of the University of Nairobi. The PTC was built to heat air to temperatures of 1000C and above which cannot be attained by direct sunlight or by flat plate collectors. The trough was made of a standard galvanized sheet with two hard board end pieces. Aluminum foil was used as the reflective material and was glued on the inside of the trough on the galvanized sheet. The stand was made of 50.8 X 50.8 X 3mm square tubes. The receiver pipe was made of 1 inch (25.4mm) diameter galvanized water pipe.

The design, construction and testing of a solar operated refrigeration unit

The project consisted of the design, construction, and testing of an exclusively solar operated refrigeration unit. Direct application of solar energy to refrigeration involved the use of an intermittent absorption refrigeration system. Design specifications were:- 1/8 ton of refrigeration at - 200C evaporator temperature refrigeration process to last 3 hours. Ambient temperature variation from 200C to 350C. Minimum generation period of 3 hours. For the unit, the design procedures to meet system specifications have been explained, and component fabrication processes outlined.

Factors influencing implementation of solar energy projects in Homa-bay County, Kenya

This study sought to examine the factors influencing the implementation of solar energy projects in Homa-bay County, Kenya. From the outset, as detailed in the background, the value proposition of renewables, especially solar energy systems are well covered.

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