[en] An outline of a new prediction method for a aerodynamic noise generation by a wind turbine is presented. The two critical aerodynamic sources have been found to be the trailing edge noise, and the turbulent inflow noise. New models for each of these sources have been developed, based on theoretical and experimental results from aeronautical applications. The initial comparison of predictions using the new model with experimental data on overall levels for the MOD 2 wind turbine gives satisfying agreement. The sensitivity of the predictions to the assumptions of the model have been investigated, and design trends for effects of the principal rotor parameters on noise radiation are given. (author)

[en] The Severn Estuary has one of the world's highest tide ranges. In 1981, the Severn Barrage Committee suggested a 7200 MW ebb generation barrage linking Lavernock Point near Cardiff to Brean Down near Weston-super-Mare. During 1983-85, the Severn Tidal Power Group (STPG) Interim Study compared that site with an alternative at English Stones and again recommended the Cardiff-Weston alignment. The Pound 4.2M Severn Barrage Development Project was then undertaken by STPG and the results were published. Subsequently, a period for public comment took place. Accordingly, two further studies have been undertaken. The first dealt with sedimentation in Bridgwater Bay and the related effects on flora and fauna; it also checked the energy availability. The second study, concerning the effects on the Local Authorities, is now in its concluding phase and the results are outlined. (author)

[en] This paper is intended to provide general advice to sponsors of renewable energy projects who expect to raise project-based financing from commercial banks to fund the development of their projects. It will set out, for the benefit of such sponsors, how bankers typically approach the analysis of these undertakings and in particular the risk areas on which they concentrate. By doing so it should assist sponsors to maximise their prospects of raising bank finance. (author)

[en] The Mersey Barrage will provide electricity generation by impounding flood tides and releasing the water later on the ebb through turbines. The Barrage will provide a catalyst for regeneration on Merseyside. It has been the subject of studies and design since 1983. The objectives of the recent studies were to promote certainty in regard to construction costs, methods and programme and to carry out a cost benefit analysis. The concerns of the environmental and shipping interests were further considered. (author)

[en] Competition is not new in the electric power industry. At one time, the city administration of Chicago had granted three city-wide franchises and over 40 partial concessions. The resulting supply chaos led to a proposal that utilities be given a monopoly status in return for which they would submit to regulation of tariffs by a regulatory body. Most utility managers of the present generation have grown up within this model. (author)

[en] This paper reviews the state of the art of the available solar technologies for electricity generation and analyses the economic aspects of these technologies. (author)