Energy for Rural and Island Communities (eBook)

Proceedings of the Conference, Held in Inverness, Scotland, 22-24 September 1980

John Twidell (Herausgeber)

eBook Download: PDF | EPUB

2013 | 1. Auflage
264 Seiten
Elsevier Science (Verlag)
978-1-4831-9007-5 (ISBN)

Infos

Energy for Rural and Island Communities covers the proceedings of the conference held in Inverness, Scotland on September 22-24, 1980, which aims to gather several professionals concerned with energy supplies for island and rural communities in the 1980s. The papers in this collection are divided into six themes. The first three major topics the papers tackle are the strategy and action in providing energy resource to rural and island communities; the community energy use and generation; and the renewable energy supplies. Other papers discuss several energy sources such as wind, water, and solar. The last part is devoted to presenting papers on development and planning in relation to energy consumption of island and rural communities. This compendium will be invaluable to government and private sectors, educational institutions, and others interested in studying the energy resource, consumption, and generation for island and rural populations.

Textauszug

Energy for Rural and Island Communities–An Introduction

John Twidell,     Department of Applied Physics and Energy Studies Unit, University of Strathclyde, UK

ABSTRACT

Rural and island communities form the major proportion of World population, yet receive little attention for energy development. Only the harnessing of the dispersed low-intensity renewable forms of energy, in small scale local application, will provide energy for these communities. Development is complex, but must be based on ecological principles. Modern science and technology has much to offer in harnessing renewable supplies, but the associated affects of local development and employment must be considered. Examples are given from the conference programme to reinforce the appreciation of these principles.

KEYWORDS

Renewable

energy

rural

technology

planning

development

INTRODUCTION

Energy Needs

The rural population of the world forms 60% of the total 4,400 million population. The fraction is decreasing as people in the Third World are drawn to cities for employment, social services, economic markets and energy supplies. This urban drift is seen as a major difficulty in development for universal prosperity, and all countries have agencies to reinforce rural life. In Scotland all this has been seen before, so that now the Highlands and Islands area with 17% of Britain’s land area has but 0.6% of the population. The number of people economically maintained in the area is moreover much less than the whole due to retirement and unemployment. We may compare this with 200 years ago when the same area maintained six times the proportion of Britain’s population. The reasons for the changes are complex and often beyond control, yet energy supply clearly plays some part. At this conference we shall concentrate on energy supply as a poorly understood and even less developed aspect of rural and island life.

We must adopt a down-to-earth practical approach to the problem. There are too many academic conferences and publications on national large-scale energy strategy that have little relevance for rural and island communities. We are told there are no energy difficulties now, and the main need is to consider insurance for the future rather than tangible developments for immediate use. This is however poor advice, and such statements are too easily made by national authorities working in urban administrations out of touch with rural and island life. In Britain, such policies stem mainly from South East England.

A Lesson from Fiji

Recently I had the privilege of working in the Fiji Islands of the South Pacific. Within the programme of rural electrification, islanders were given diesel generators for cooperative village grid networks on the condition they maintained the supply themselves. Their difficulty however was how to pay for the fuel and services even if the capital payments were donated. Oil price was like a rising meniscus that was steadily submerging development and threatening established livelihood. At the time it appeared to me that this meniscus was rising through the less developed world, and that it would be many years before it engulfed the developed countries. I was wrong. On returning to the U.K. I find the identical problem is being faced by certain Scottish islands. The only difference is that the islands in Scotland are being treated as minor oddities with little national impact, whereas the Fiji islands are credited with national importance representing a problem being faced by 60% of the World’s population. The common link is the extraordinary power of small islands to act as microcosms for the analysis and solution of problems that have immense complexity on a national scale.

There is a further aspect of these island electric energy supplies that is of major importance. The difficulties appear to be economic, but are fundamentally technical. Present energy efficiencies range between 10% and 30%. This is far too low, since it is quite feasible for efficiencies to rise close to and beyond 100% by controlling all aspects of the energy and using heat pumps. Moreover fuel costs can become zero if renewable sources are used. In practice therefore energy development and application is ‘device limited’ and not ‘cost limited’.

Energy for Whom?

We are considering energy for rural and island communities. We are not considering the extraction or release of energy from rural sites to be transmitted to urban complexes. This is an important difference and we must be clear about the distinction. It is this aspect that distinguishes our conference from many others, and with which we must hope to produce real and immediate benefits for rural people. I believe the distinction will lead us to realise that small scale renewable sources of energy offer by far the best opportunities for improvements, especially when local industry and employment opportunities are included in the equation. It is people that matter, not things. It is pointless to send energy to a rural area if the population has evaporated. Energy developments demand large resource allocations, but all too frequently the money for capital and maintenance appears as benefit outside the rural area of concern and does not reach the local community. We know it is the local education and employment of young people that give vigour to a community, and unless a full range of job skills can be exercised the community will decline. Thus I am sure we shall be keeping an eagle eye on energy developments that lead to increasing local employment and manufacture in our rural and island communities. This is more likely to happen by harnessing the dispersed renewable forms of energy and using these at low intensity in the vicinity, rather than bringing in supplies from centralised sources or concentrating the renewable supplies for export to urban complexes. Several of the papers at our conference will be describing commercial and planning activities stemming from energy developments, and I hope such subjects will feature strongly in discussion.

ENERGY REQUIREMENTS

Rural and island areas of the world are now critically dependent on oil for commercial energy supplies. The extent of this dependence is still not fully appreciated at the local level, and it is urgent that we quantify these energy flows. The way we use energy now relates to the life we wish to preserve, and we must reinforce this life before considering new developments. We have one conference paper describing a complete energy survey of an island community in Orkney, which will remind us how we use energy. Perhaps this will convince every local administration to conduct energy surveys as preparation for energy developments.

Energy requirement may be likened to a multilayer cake that becomes sweeter and more decorative to the top, but relies on hidden foundations below which must not crack. For most of the world the main foundation is firewood for cooking and space heat. This is usually a non-commercial energy flow of extreme importance. In Scotland this relates to peat and the yet unquantified supplies of waste wood from forestry, and falls within the study of biomass production and the use of waste products. We shall be having several papers within this general area, at both a strategic and local industrial level.

Heat

In cold and temperate regions a basic requirement for energy is space heat, and in all agricultural and manufacturing industry there is need for process heat. On the islands of Northern Scotland domestic heating is continuous through the year and forms about 50% of total energy demand. Architectural design must allow for this, and we have several papers relating to building construction. These show that in Scotland it is surprisingly important to design for passive solar heat gain and essential to regulate ventilation. When considering alternative supplies of energy, the need for space and process heat usually dominates over the need for controlled electricity. Thus it becomes sensible to consider direct energy conversion to heat from wind and hydro sources.

Transport

Haulage and transport are dominant energy requirements in rural and island areas. Again it is necessary to quantify the needs and consider local effects. Any fuel system based on large-scale oil refining or synthetic petroleum production from coal will prove expensive for these areas. Located at the outer circumference of any centralised energy supply, the communities will bear the greatest distribution costs, will appear of minor market importance, and will not benefit from the cash flow and employment opportunities of centralised production. For instance in Northern Scotland there is stark contrast between the difficulties of rural and island energy supplies and the energy bounty of the off-shore installations feeding centralised refineries.

There is but one strategy to lessen the problems of transport to rural and island areas – the strategy of local self sufficiency for goods and of modern telecommunications for information. The former must certainly include food, and the latter can today include two-way video and facsimile telecommunication. Within the...

Produkt-Details

• Erscheint lt. Verlag: 22.10.2013
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Physik / Astronomie
• Themenwelt: Technik ► Elektrotechnik / Energietechnik
• Themenwelt: Wirtschaft
• ISBN-10: 1-4831-9007-2 / 1483190072
• ISBN-13: 978-1-4831-9007-5 / 9781483190075