KINETICS & REACTOR DESIGN
INTERGRATED PROJECT 2015
(GROUP 20)
Transfer Function
Transfer function of the reactor
A fluidised bed reactor consists of an electrical heater to maintain the required temperature in the reactor.
The transfer function can be initiated into two parts : the reactor and the heater
The Reactor :
The Heater :
By implementing the superposition principle, effects of simaltaneous changes in both input temperature and heat energy is expressed below by the transfer function :
The order of the transfer function
First order.
The control variable(s), manipulated variable(s), and possible disturbance variable(s) for the reactor
Controlled Variable (CV) : Flow rate of biogas, flow rate of bio-oil, flow rate of char (solid)
Composition of biogas, composition of bio-oil, composition of char (solid)
Manipulated Variable (MV) : Biomass feed flow rate, kg/hr
Disturbance Variable (DV) : Operating pressure, operating temperature, catalysts
The type of control alghorithm (P, PI or PID)? Why?
The PID controllers is recommended. PID controller is a combination of proportional, integral and derivative controller, therefore it combines all the advantages of these controllers. As shown in the graph below, a PID controller has lower oscillation and offset occurs. In the PID controller, the integral control output will detect the error signal over time, resulting in a reduction in response time.
