Fuel compositions separation temperatures

The optimized parameters are pressures of the working agent before and after the expansion valve. The absorber refrigeration machine achieves a COP of 1.41. Optimization should be carried out separately for each type of heat source (e.g. fuel cell type) connected to the chiller, due to the different composition and temperature of the flue gas delivering the heat to the chiller in each case. 

The flow involves fuel, F, issuing from a central slot of width D with an oxidizer, O, co-flow with both streams at the reference temperature, Tq. A global single-step, irreversible, exothermic chemical reaction of the type F + rO —> (1 -f r)P with an Arrhenius reaction rate coefiicient is assumed. A hot layer of combustion products, P, at the inlet serves to separate the fuel and oxidizer streams and acts as an ignition source. The inlet conditions for the velocity, temperature, and composition are shown in Fig. 10.2. The ratio of the inlet velocities of the fuel to oxidizer streams is chosen as 4. Inlet velocity forcing is used to induce early roll-up and pairing of the jet shear layer vortices. 

Separation of the individual contributors can provide useful information about performance optimization for fuel cells, helping to optimize MEA components, including catalyst layers (e.g., catalyst loading, Nafion content, and PTFE content), gas diffusion layers, and membranes. It assists in the down-selection of catalysts, composite structure, and MEA fabrication methods. It also helps in selecting the most appropriate operating conditions, including humidification, temperature, back-pressure, and reactant flow rates. 

Description of the process. The process involves the utilization of two separate CFBs, both operated at ambient pressure (Figure 16.11). The first is a flash pyrolysis reactor in which waste is converted with the addition of steam, at a temperature between 700 and 900°C, into product gas and tar. The reducing atmosphere avoids the dioxins formation. The prodnct stream, made of fuel gas and HCl in a composition strongly dependent on feed/steam ratio, is quenched to recover HCl, which is then further purified. The second CFB is a combustor that provides heat for flash pyrolysis by burning the residnal tar the... 

---