Paper Conference

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea


Simulation structure of model predictive control of HVAC system

Yasuo Utsumi, Ken Hatakeyama, Yoshio Esaki, R. Kimura

Abstract: It is necessary for Japanese public welfare section to reduce CO₂ emission rate with severe constraints on the power supply after great east Japan earthquake. One of the most effective methods to reduce energy consumption in buildings is to install the advanced HVAC control system that responds to weather condition, the influence of thermal property of the building envelope, occupants‟ schedule, heat generation from the OA apparatus, etc. Also Model Predictive Control, MPC, with predictive simulation and related control systems is often mentioned as the future of the building simulation in the smart grid, smart community, etc. This paper describes MPC as the optimum HVAC control system. The simulation is executed using BEMS data, the weather forecasting, etc. The concerned targets are to reduce CO₂ generation, energy consumption and cost with insuring thermal comfort for occupants. For MPC to achieve the targets, the role of simulation is very important and it may be pursued by the embedded system including BEMS. The brief simulation structure and whole system is explained. The accumulation of expertise of the construction, the tuning of the simulation model, the operation in many usages of buildings may offer the simplified systems. Especially, the function of communication with user-friendly interface between complicated control program and a user who may be a building manager, etc. is necessary. Also the data transferring in the MPC system is discussed in the form of “Adaptor-Bridge” that consists of two functions “Adaptor” and “Bridge”. The former function can modify the unit or the range of input data in advance and delivers the data to simulation engine, etc. The latter function can transfer input and/or output data between “Adaptor” and each module in simulation engine, and adds new “Adaptor” functions accordingly. Simulation result as an output from each module is transferred under the control of “Bridge”, “Adaptor” and user interface, UI. * Corresponding author email:
Pages: 620 - 626