APPLICATION OF A SUPERCRITICAL CO2 POWER CYCLE IN A COGENERATION POWER PLANT
Cogeneration, or combined heat and power (CHP), is the use of a heat engine or power station to simultaneously generate electricity and useful heat. In separate productions of electricity, some energy must be discarded as waste heat, but in cogeneration this thermal energy is put to use. Due to thermodynamically efficient use of fuel the cogeneration allows to decrease costs of energy production and negative impact of emissions on the environment. Usually the CHP plant is based on gas turbine unit (GTU) or steam plant and has a flexible ratio of cogeneration, which depends on the season.
Carbon dioxide is a unique fluid with unique attributes, but it's the supercritical CO2 power cycle that holds a lot of promising power technologies! These days, we can see a lot of articles that consider different supercritical CO2 cycle modification applications (such as waste heat recovery, CSPs, and nuclear power plants), and each author uses some specific tool to analyze the performance, but there's always an important calculation factor missing.
Reducing steam turbine costs while increasing efficiency
For as long as steam turbines have existed, there have been two major trends for drivers in steam turbine development and innovation: achieving higher efficiency and ensuring longer life span and reliability.
Turbomachinery flows that contain solid particles represent an undesirable yet often inescapable condition because of practical operating considerations. Dust, sand, fly ash, iron oxide, process-originated materials, and debris from abradable seals or blade rubbing are examples of the varied composition of these solid particles.