Multivariable Control of a Heat Pump System Based on a Local Linear Model Network

Abstract

The present work describes a control concept of a heat pump system using stable local linear model network. We have already shown in [1] that this model structure can be used to identify the refrigerant circuit module (RCM) with a high model quality. The RCM is a coupled constrained nonlinear multi-input multi-output (MIMO) system. Accordingly, we use a constrained model predictive controller (CMPC), which receives the optimal linear transfer functions of the system depending on the operating point via the local network. The presented concept was verified on an air/water heat pump for which a flow temperature control was implemented.