Exergy and Exergoeconomic Analyses of a Byproduct Gas-Based Combined Cycle Power Plant with Air Blade Cooling.

A combined cycle power plant (CCPP), which can use several kinds of byproduct gases as fuel, has attracted significant attention in the field of power generation due to their higher efficiency and lower environmental impact. Here, a simulation model of a 180 MW CCPP with air-film blade cooling was established using ASPEN HYSYS and analyzed from both exergy and exergoeconomic perspectives to evaluate the system performance in terms of exergy efficiencies and exergy destruction of the system and the economic costs of the process and analyze the effects of the system from different inlet air temperatures and ambient temperatures (15-15 model, 15-25 model, and 25-25 model). The production and residue cost distribution ratios were defined in the fuel and product table, which represents how the product of a given component is distributed among the other apparatuses, and whether it forms a final product or becomes a residue.

Assessment of the Redox Characteristics of Iron Ore by Introducing Biomass Ash in the Chemical Looping Combustion Process: Biomass Ash Type, Constituent, and Operating Parameters.

Chemical looping combustion (CLC) is a potential CO capture and sequestration (CCS) technology that can easily separate CO and HO without energy loss and greatly improve the efficiency of carbon capture. Due to the inherent defects of natural iron ore, such as low reactivity and poor oxygen carrying capacity, four kinds of biomass ashes (rape stalk ash, rice stalk ash, platane wood ash, and ash) that have different constituents of K, Na, Ca, and Si were applied to modify the redox performance of natural iron ore. The effects of biomass ash type, constituent, reaction temperature, HO vapor flow rate, and redox cycle on the CLC process were assessed experimentally in a batch fluidized bed reactor system.