Maximum Fuel Energy Saving of a Brayton Cogeneration Cycle

An endoreversible Joule-Brayton cogeneration cycle has been optimized with fuel energy saving as an assessment criterion. The effects of power-to-heat ratio, cycle temperature ratio, and user temperature ratio on maximum fuel energy saving and efficiency at maximum fuel energy saving have been investigated. Result shows that the maximum fuel energy saving still has maximum with respect to power-to-heat ratio. For given cycle and user temperature ratios, the optimal power-to-heat ratio has been numerically determined.