Analysis of energy indices of a power plant adapted for the production of heat integrated with the amine Carbon dioxide processing unit

• The adaptation of power plant for heat production is an effective way of cogeneration.
• Cogeneration of heat and electricity also requires a CPU unit.
• Integration with CPU units requires a modification of cogeneration algorithms.
• Coefficient of heat cogeneration is an adequate measure of efficiency.

The adaptation of a power plant for heat production is an effective way of realizing high-efficiency cogeneration, and although the consumption of chemical energy of fuel decreases in comparison with the separate production of electricity and heat leading to a certain reduction of CO2 emission, the installation of CO2 capture ought to be applied. The paper concerns an amine installation of CO2 processing unit. The application such an installation (capture and compression of CO2) requires the supplementing of the calculation algorithms of energy indices of an integrated power plant adapted for the production of heat. The paper presents characteristic indices of a power plant adapted for heat production, viz. power loss coefficient (PLC) and overall energy efficiency as well as coefficient of heat cogeneration (COHC). The internal electro-mechanical power and heat consumption have been analyzed concerning various values of the unit consumption of heat for the purpose of regenerating the sorbent. Formulae expressing the overall net energy efficiency of an adapted power plant concerning the analyzed variants of integrated power plants have been derived. The influence of the unit consumption of heat for the regeneration of the sorbent on overall net energy efficiency of the adapted power plant and the coefficient of heat cogeneration have been analyzed.