Abstract

Currently, the design and development of HVAC systems increasingly requires consideration of indoor comfort, which makes the control of indoor humidity particularly important. Considering the miniaturization and complexity of the system structure, a water loop assisted desiccant cooling system (WLDC system) was combined with the radiant ceiling cooling (RCC) system to form a temperature and humidity independent control (THIC) system. For the effective decoupling operation of the THIC system, this paper has proposed a decoupling operation control strategy and demonstrated the indoor environment control capacity through comparative analysis with other strategies. The THIC system and operation strategies are established by EnergyPlus software. The results show that the proposed system is able to maintain both the indoor temperature and humidity. With the proposed operation strategy, the THIC system is able to operate completely in a decoupling state and achieve a fast response of indoor temperature by dividing the control strategy into cool-down time with general time. The effective cooling capacity of the RCC system is increased by resetting the indoor relative humidity which can avoid the increase of the indoor temperature when the sensible load changes rapidly.