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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.

Changes in energy use patterns in the Bushbuckridge Lowveld of the Limpopo Province, South Africa: eleven years on

Madubansi, Mainza January 2004 (has links)
This research reports on the energy transition that has taken place in the Bushbuckridge district between 1991 and 2002. It is a follow up to a similar study that was done in 1991 investigating a number of aspects of energy use. It uses the 1991 study as a baseline and aims to explore how the passage of time, growth of the local population and changes in incomes and the availability of fuels have affected the patterns of fuel use in the region in the past eleven years. A structured interview approach was used for most aspects of the study. The interview schedule included sections on types, amounts and reasons for use and non-use of 13 different energy sources as well as data on income levels, household size and other economic parameters. Analysis of the consumption patterns of the different fuel types revealed that between the two survey periods, households in the sample settlements went through some pronounced changes in patterns of fuel use, particularly those that had acquired electricity. The introduction of electricity in the region had certainly played a major role in spurring the energy transition. Fuels that were previously used for lighting, powering entertainment appliances and refrigeration had been displaced by electricity. In terms of cooking and other thermal application, however, the vast majority of households in all the sample settlements continued using fuelwood and complemented it to a lesser extent with paraffin and electricity. In both surveys, the use or non-use of available fuels in the region was influenced by several factors. Common reasons for non-use of certain fuel types included expense, lack of appliances, the risk involved in using such fuels and the preference for other fuels. Reasons for use were mainly related to the low cost of the fuel and the fuel’s ability to meet particular end uses. Although incomes in the region had increased between 1991 and 2002, they were still below the poverty line. Activities from which households obtained their income remained the same. Old age pension, migrant wages and the informal sector remained the largest contributors of income to most households. Other indicators of relative wealth and poverty, like ownership of vehicles, bicycles and beds remained the same.

Energy analysis of various tillage and fertilizer treatments on corn silage production

Owen, Gordon Thomas. January 1985 (has links)
No description available.

Energy use by households in a rural area of the Philippines /

Yust, Becky Love January 1986 (has links)
No description available.

Development of instruments to measure individual characteristics related to residential energy management behavior /

Hilton, Bonnie Auerr January 1977 (has links)
No description available.

Development of instruments to measure individual characteristics related to residential energy management behavior /

Hilton, Bonnie Auerr January 1977 (has links)
No description available.

Monitoring and modelling of the energy consumption in polymer extrusion

Abeykoon, Chamil, Kelly, Adrian L., Vera-Sorroche, Javier, Brown, Elaine C., Coates, Philip D. January 2014 (has links)

Process Optimization of Dryers/Tenters in the Textile Industry

Xue, Li 12 July 2004 (has links)
Textile dyeing and finishing industry uses dryers/tenters for drying and heat-setting fabrics. A very large fraction of the heating value of the fuel consumed in the burner ends up as waste in the dryer exhaust. An initial calculation showed that up to 90% of the energy consumed in the tenter is wasted. Therefore, quantifying the energy waste and determining drying characteristics are vitally important to optimizing the tenter and dryer operations. This research developed a portable off-line gas chromatography-based characterization system to assess the excess energy consumption. For low-demanding heat-setting situations, energy savings can be realized quickly. On the other hand, there are demanding situations where fabric drying represents the production bottleneck. The drying rate may be governed either by the rate of heat transport or by the rate of moisture transport. A mathematical model is being developed that incorporates both these processes. The model parameters are being obtained from bench-scale dryer studies in the laboratories. The model will be validated using production scale data. This will enable one to predict optimization dryer operation strategies.

Modelling and forecasting energy demand using meteorological data

Tress, Graham January 1983 (has links)
No description available.

Procedure over purpose : development and implementation of energy conservation policy in UK

Owen, Gillian Frances January 1994 (has links)
Set in the context of the problems the UK has experienced in achieving effective economic policies, focusing primarily on the role of the civil service, the thesis examines the development and implementation of energy conservation policy, in the UK, from the mid-1970s until April 1992, concentrating mainly on the 1980s. Changes since April 1992 and the prospects for energy conservation in the remainder of the 1990s are considered briefly in the final chapter and conclusion. The thesis uses energy conservation as a case study to explore general theories of policy development and implementation. Comparisons are made with Japan and Denmark. In the case of Japan, the comparison is set in the context of Japanese economic success and the role of the Ministry of International Trade and Industry. In the case of Denmark, the context is the planning system and the role of local government. The thesis examines the relative importance of systems of administration and other factors including: prevailing ideological orthodoxies; the roles of policy communities and networks. The title - "Procedure over purpose" - reflects several themes within the thesis including: the differences between procedure and purpose governed states; the relevance of the 1980s and 1990s civil service reforms to procedure or purpose driven policy areas. A further important theme is efficiency, both in terms of the emphasis on efficiency in civil service reforms and because of a change of terminology from energy conservation to energy efficiency during the period under study. Conclusions are drawn on the extent to which development and implementation of energy conservation policy in the UK has been governed more by procedure than a sense of purpose; how far this differs from other countries (primarily Japan and Denmark); its effect on the UK's achievement of energy savings up to the late 1980s; and the implications for policy success or failure.

Household energy in rural Pakistan : a technical, environmental and socio-economic assessment

Qazi, Azra Nuruddin January 1989 (has links)
No description available.

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