Optimization Simulation of Temperature Control Systems for Smart Water Heaters

Abstract

Cutting energy use and emissions is now central to social progress, and buildings have become a primary target. Smart-home technology can meet individual comfort demands while trimming consumption. Yet today’s installations still waste power and their subsystems rarely coordinate. This paper examines a coupled controller that links air-conditioning with a domestic water heater. A thermodynamic model drives an automation layer that diverts part of the air conditioner’s rejected heat to pre-warm the tank. Dynamic simulations and energy accounting show the two loops are tightly coupled: room-temperature control remains robust when its own set-point changes, whereas hot-water regulation is easily disturbed by the air conditioner’s operating state. The runs also chart a clear downward trend in overall demand. Overlaying room and water temperature transients confirms that the recovered heat yields both significant and replicable sizeable savings. The scheme is readily packaged for commercial products and offers manufacturers a route to upgrade their lines to quickly implement.