The combined production of electrical,heating and cooling energy is becoming an increasingly important technology.It has several advantages: these include a lower consumption of primary energy,reduction levels of air pollution,and less expenditure.Simultaneous production of heat,cold and power gives us higher efficiency of whole system.Depending on the conditions,these combined systems can be the most economical solution for a building.The requirement is that the system is located where there is a high consumption of electrical,heating and cooling energy throughout the year.An example of the type of consumer that has such conditions is a hospital.This paper constitutes a work starting from an analysis of typical energy demand profiles in a hospital,the technical criteria to assess the feasibility of cogeneration plants are proposed.Typical results for the hospital are presented.
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