1. The problem statement, all variables and given/known data The question asked about a cogeneration plant with water as a working fluid, but I am not sure what type of cycle it belongs to. The plant uses utility heat and steam can be throttled. 2. Relevant equations The system was assumed to be ideal, no pressure drop, no heat loss and is internally reversible. 3. The attempt at a solution Brayton, ideal Rankine cycle?