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Estimating recoverable work of an engine by utilizing the CO2 Brayton power cycle and capturing heat lost

Farzaneh-Gord M., Reza Behi M., Yahyaie A., Ali Akbar Mirmohammadi S.

Archives of Thermodynamics

2009

Vol. 30, no. 3

89-110

The present work provided details of energy accounting of a natural gas powered internal combustion engine and recoverable work by utilizing a CO2 Brayton power cycle. Based on experimental performance analysis of a new designed IKCO (Iran Khodro Company) 1.7 liter natural gas powered ICE, full energy accounting of the engine was carried out on various engine speeds and loads. Further, two possible CO2 Brayton cycle configurations have been appointed to take advantages of engine heat lost. Based on thermodynamic analysis, the amount of recoverable work, obtainable by CO2 Brayton cycles have been calculated on various engine conditions. The results show that as much as 17 kW power could be generated by the power cycle which is a considerable amount of power especially if compared with the engine brake power.