Optimal model for overall HVAC system

Abstract

According to the problem that the components of HVAC (Heating, Ventilating and Air Conditioning) system have strong coupling and low energy efficiency, an optimal model for HVAC based on system energy input ratio (SEIR) is proposed. Firstly, according to each equipment characteristic, the performance curve model of each equipment power was built. Basing on these models, the performance curve model of system energy consumption was built too. Then, basing on three kinds of constraints, that is, energy conservation constraint, performance constraint, and coupling constraint, the constraint equation was built as well. Finally, by simplifying the model parameter and taking the least energy input ratio as an objective function, the optimal set point model of various equipments was established. The experimental results indicated that compared with the least energy consumption optimal method, the system power at minimal SEIR was improved by 6.89 %. It proved that the model can obtain better energy saving effect. © 2014 Springer Science+Business Media New York.