Integrating Radiative Cooling and Chilled Ceilings in Buildings: A Simulation Study for Sustainable Cooling
Abstract
The Radiative Collector and Emitter (RCE) is a device that combines the functionalities of radiative cooling and solar heating to cool down or warm up water, respectively. This study present a first approximation of the integration of RCE systems with chilled ceilings to provide sustainable cooling solutions for buildings. The research focuses on a multifamily building in Lleida, Spain, and employs TRNSYS 18 for simulation during the summer months. The RCE system leverages the natural process of radiative cooling, emitting infrared radiation into space to dissipate heat and reduce temperatures with minimal electricity consumption. The combined system's performance was compared against a commercial air conditioner system, demonstrating energy savings for cooling demand of approximatively 140 kWh during the observed period, along with enhanced occupant comfort. The RCE system achieved a mean net radiative cooling power of 30.34 W·m⁻² and an efficiency of 42.3%, reducing the storage tank temperature by an average of 3.29°C nightly. The chilled ceiling system operated autonomously 87.74% of the time, maintaining comfortable indoor temperatures.