Optimal control strategies for hollow core ventilated slab systems

Abstract This paper evaluated potential operational cost savings associated with optimal control strategies for hollow core ventilated slab systems used to maintain indoor thermal comfort for office buildings. First, a simplified calculation method was developed to convert two-dimensional (2D) modeling of ventilated slab thermal performance to one-dimensional (1D) analysis in order to reduce computational efforts required for optimization search while maintaining acceptable accuracy level. The total energy costs were considered to identify optimal control strategies to operate ventilated slab systems to cool and heat office spaces. Penalty functions restricted the optimization search to ensure that indoor thermal comfort was maintained during occupancy periods. Then, the consecutive time block optimization (CTBO) technique was used with a genetic algorithm (GA) based search method to identify strategies that minimize the operational costs of the ventilated slab systems. A comparative analysis was carried out to evaluate the impact of ventilated slab systems’ design properties on the optimal operational cost savings. The results of the optimization analysis showed that the proposed optimal controller can achieve up to 11% cost savings to operate ventilated slab systems.

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