AS_02_2019

CONTROLLO tecnica Marzo 2019 Automazione e Strumentazione 96 Soroush Rastegarpour Luca Ferrarini An MPC Approach for Energy Management in Buildings with Radiant Floors The house considered in this paper is heated with a radiant floor technology. υ Figure 1 shows the schematic of the system un- der control. It is modeled based on sin- gle volume modeling ap- proach as studied in [1] [2] . This modeling approach takes into account the dy- namic behaviour of the thermal variables and can be used for the energy analysis and temperature profile estimation in buildings. Model description The control-oriented heat pump model is defined by its coefficient of performance (COP). The COP of a heat pump is defined as the ratio between the heating effect Q out and the net work W required to achieve that effect. The COP can also be approximated using the temperatures of the cold and hot zones. The dynamical model of the thermal energy stor- age (TES) can be formulated based on convection and conduction heat transfer equations between different tank layers, similar to the approaches described in [1] [3] . In these models, the tank is discretized vertically into several nodes, such that the partial differential equation model of the tank is converted into a set of n ordinary differential equations where n is the number of nodes and, consequently, the order of TES model. Control problem formulation In the proposed distributed model predictive control (DMPC) structure, similar to the concept described in [4] , each MPC has different possibly GLI AUTORI S. Rastegarpour, L. Ferrarini - Dipar- timento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy. CONTROL TECHNIQUES TO ENFORCE COMFORT AND ENERGY SAVINGS IN EFFICIENT BUILDINGS In this paper, the performance of the building energy resources management system is improved through the application of distributed model predictive control (DMPC) approach to economically balance energy flows among all energy storages, including electrical energy storage, thermal energy storage, energy sources (both electrical grid, heat pumps and renewable generation systems) as well as the building itself as a type of thermal energy storage, in order to assure user’s comfort and economic convenience. A FIL DI RETE www.deib.polimi.it www.polimi.it Un approccio MPC per la gestione dell’energia negli edifici con pavimenti radianti In questo articolo, viene discusso come migliorare le prestazioni di un sistema di gestione delle risorse energetiche di edifici ‘smart’ attraverso l’applicazione di tecniche di controllo predittivo distribuito. In questo modo, è possibile bilanciare economicamente i flussi energetici tra gli accumuli di energia, inclusi batterie e serbatoi, fonti di energia (tipicamente pompe di calore e sistemi di generazione rinnovabile) e l’edificio stesso come un tipo di accumulo di energia termica, al fine di garantire il comfort dell’utente e l’ottimizzazione economica. Figure 1 - Schematic of proposed integrated energy resources system