ScienceAsia 30 (2004): 135-147 |doi: 10.2306/scienceasia1513-1874.2004.30.135

Dynamic Simulation and Control of an Isopropanol-Acetone-Hydrogen Chemical Heat Pump

Waraporn Kitikiatsophon and Pornpote Piumsomboon^*

ABSTRACT: In this paper, the study was focused on the dynamic behavior of isopropanol-acetone-hydrogen chemical heat pump system (IAH-CHP). The model for the IAH-CHP was developed and investigated under the environment of Hysys.Plant. The most important process variables, that affect the stability of the system, are the pressure in distillation column and at the outlet of the compressor. With plant-wide control concept, eight control loops were required for the system. These were 2 pressure control loops for distillation column and compressor, 2 level control loops for condenser and reboiler, 2 temperature control loops for reactors, concentration control loop for isopropanol in the distillate, and heat flow control loop for exothermic reactor. All control loops were tuned and tested for stability.

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Fuels Research Center, Department of Chemical Technology, Chulalongkorn University, Bangkok, 10330, Thailand.

* Corresponding author, E-mail: pornpote@sc.chula.ac.th

Received 26 Nov 2003, Accepted 25 Mar 2004