Maximizing Thermal Power Output of an Ammonia Synthesis Reactor for a Solar Thermochemical Energy Storage System

[+] Author and Article Information
H. Kreetz, K. Lovegrove, A. Luzzi

Centre for Sustainable Energy Systems, Department of Engineering, Australian National University, Canberra ACT 0200, Australia

J. Sol. Energy Eng 123(2), 75-82 (Nov 01, 2000) (8 pages) doi:10.1115/1.1352737 History: Received June 01, 2000; Revised November 01, 2000
Copyright © 2001 by ASME
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Grahic Jump Location
The effect of reaction extent of the feed gas on effective power level for 10, 20 and 30 MPa. Outer reactor temperature profile and inlet gas temperature are optimized for each reaction extent inlet. Massflow: 0.9 g s−1
Grahic Jump Location
The effect of variation of massflow and pressure on effective power level with an optimized gas inlet temperature and outer reactor wall temperature profile for each condition (pressure-massflow). Inlet reaction extent: 0.98; massflow variation between 0.1 g s−1 and 1.1 g s−1 with 0.2 g s−1 step
Grahic Jump Location
The effect of gas inlet temperature on effective power level for 10, 20 and 30 MPa. Outer reactor temperature profile is optimized for all gas inlet temperatures. Reaction extent inlet: 0.98; massflow: 0.9 g s−1
Grahic Jump Location
The effect of varying the outer reactor wall temperature profile on effective power level. Each curve represents runs of linear reactor wall temperature profiles with a constant slope and variable start temperatures. Pressure: 20 MPa; massflow: 0.9 g s−1 ; reaction extent inlet: 0.98; inlet temperature of the gas was assumed to be 50°C lower than the temperature of the reactor’s wall at the start of the bed for all simulation runs.
Grahic Jump Location
Representative modelled average internal and external reactor temperature profiles plus the corresponding reaction extent profiles for the optimum recovery of heat for three different massflows and pressures (a: 10 MPa, 0.1 g s−1 ; b: 20 MPa, 0.7 g s−1 ; c: 30 MPa, 1.1 g s−1 )
Grahic Jump Location
The effect of variation of average external reactor wall temperatures on change in reaction extent between reactor inlet and exit, determined from numerical model and experiments; Conditions: 15±0.8 MPa,0.2975±0.003 g s−1
Grahic Jump Location
Equilibrium mixture compositions for ammonia/3:1 hydrogen-nitrogen



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