Screening criteria for selecting energy R&D projects are discussed and applied to a dozen projects currently underway. The impact on energy balance and environmental quality cannot be seen as the only, nor even the dominating, attribute. In the cases studied, the R&D portfolio seeks to achieve a balance between these factors and the other criteria related to technology and the market. In the event the development work is carried out at an independent R&D centre, it will be necessary to have a committed industrial partner from an early stage onwards in order to ensure objectivity, market perception and provide the best chance of commercialisation.