Dynamic modeling and multivariable control of organic Rankine cycles in waste heat utilizing processes

In this paper, the dynamics of organic Rankine cycles (ORCs) in waste heat utilizing processes is investigated, and the physical model of a 100 kW waste heat utilizing process is established. In order to achieve both transient performance and steady-state energy saving, a multivariable control strategy for the waste heat recovery system is proposed by incorporating a linear quadratic regulator (LQR) with a PI controller. Simulations demonstrate that the proposed strategy can obtain satisfactory performance. (C) 2012 Elsevier Ltd. All rights reserved.