Comparative thermodynamic analysis of compact cogeneration and triple-effect refrigeration cycles

摘要

The 'compact cogeneration cycle' and the 'compact power and triple-effect refrigeration cycle' have been compared and analysed on the basis of energy and exergy approaches under the same operating conditions. The exergy analysis of both the above cycles leads to a possible performance improvement. The cogeneration cycle has less 'exergy destruction' due to irreversibilities in the different components, 'exergy and energy lost' to the environment than that of the 'triple-effect refrigeration cycle', while the total useful exergy and energy outputs of the cogeneration cycle are greater. The used refrigerants and exhaust gas emissions samples of both cycles are more favourable than the fossil fuel-run engine for reducing the global environment-related problems. The calculation results also show that the associated cycles with the cogeneration cycle have significant higher effect on the exergy and energy efficiencies than that of the 'compact power and triple-effect refrigeration cycle'.