ABSTRACT
This is an overall review of the principles on which the interest in and possibilities of cogeneration are based. Tendencies, alternatives and main comparative results are discussed after a brief introduction to efficency definitions. Apart from equipment developments and besides new cogeneration schemes on a case by case basis, two particular aproaches are mentioned: The use as heat sources for cogeneration of municipal solid waste incineration boilers or on a completely different level, of small compact, inherently safe nuclear reactors.
