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Net workdone in brayton cycle generator#
Net workdone in brayton cycle full#

(2006) do a design for the integrated system presented in Figure 8.6. Starting from the work of Henriksen et al. Develop a design of a duct burner that produces steam at two pressures and try to maximize its exergy efficiency.

Net workdone in brayton cycle generator#

2.Ĭompare the exergy efficiency of a steam generator to that of an ammonia–water vapor generator starting from the diagrams in Figure 8.4. One can assess this comparatively, that is by comparing efficiencies (energy, exergy) of the single-stage system with a two-stage or three-stage expansion system. Assess the benefit of turbine staging with interstage reheating to 800 ☌. Indirect heat removal is required from the fuel cell stack by compressed air, initially at low temperature to enable significant conversion of the fuel flow in the cells.ĭesign a transcritical Rankine cycle with carbon dioxide having condensation at 30 ☌ and a temperature at turbine inlet of 800 ☌.

Precise balancing of the anode and the cathode operating pressures are required to prevent rupture of the fuel cell electrolyte and High-pressure operation of the fuel cell system is required

Īn adaptation of existing gas turbine is required to provide for air take-off and return of the hot depleted air and partially burned fuel.

These systems are complex, and require multicomponent and large-scale components for heat recovery

The system is highly efficient in heat recovery. Integrated plant and equipment are available for adaptation to fuel cell heat recovery and The cycle arrangement is more complicated compared to the regenerative Brayton cycle arrangement. Ĭooling and feed water are required and.The Rankine cycle inherently has a lower efficiency as compared to the regenerative Brayton and combined Brayton–Rankine cycles Steam is available for hybrid applications requiring heat. There is no need for a compressor fans for maintaining air and exhaust product gas flow will be sufficient and Heat is recovered in a boiler while a high temperature gas-to-gas heat exchanger is required in the regenerative Brayton cycle The fuel cell is operated under ambient pressure condition The efficiency and work output of the cycle is related to the compressor and the turbine efficiencies, pressure losses, and temperature differentials. Ī large gas-to-gas heat exchanger is needed for the case of high temperature heat recuperation and.The operating conditions of the compressor and the turbine equipment are limited to the fuel cell temperature and cycle operating pressure Industrial compressor and turbine equipment can be adapted for this application. The concept is more adaptable to small-scale power generation systems and

Net workdone in brayton cycle full#

įuel conversion in cells is maximized and the full advantage of fuel cell is taken into account.

No internal heat transfer surface required for heat removal Gaseous species enter the turbine with relatively low temperature (about 1065☌ for the SOFC) thus turbine rotor blades may not require any cooling The fuel cell operating pressure is relatively low, hence the problems caused by the anode/cathode pressure differential and high-pressure housing as well as piping are avoided

Ĭompressor and turbine pressure ratios are relatively low.

The cycle arrangement is simple and a minimum number of components is used