Dynamic Thermal Behaviour of Two Newly Developed PCM Cooling Ceiling Prototypes

A methodological approach to the design of high energy efficiency non-residential buildings

“…The construction of the floor and ceiling comprises a 150 mm concrete slab with the location of PCM boards above the conventional ceiling, connected thermally by means of a matrix of pressed graphite. This is in accordance with the cooling ceiling prototypes as described by (Klinker et al 2014;Weinläder, Klinker, and Yasin 2016) The PCM boards contain a salt hydrate-based PCM with a latent heat of 128 kJ/kg between 19.5°C and 26.5°C and a melting point of 26°C for the undivided and 25°C for the subdivided unit.…”

“…As the outer shell of the building, as well as the interior construction, is lightweight because of flexibility requirements and resource saving aspects, little heat storage capacity is available to buffer temperature fluctuation. To avoid room climates outside the comfort range without integrating too large conventional cooling power reserves, a combination of several thermal energy storage (TES) technologies is implemented to meet the cooling demand in an energy efficient way (Klinker et al 2012(Klinker et al , 2014Weinläder, Klinker, and Yasin 2016). One of the thermal energy storage technologies involves the integration of phase change materials (PCM) in wallboards, as well as an individually optimized cooling ceiling with PCM.…”

“…One of the thermal energy storage technologies involves the integration of phase change materials (PCM) in wallboards, as well as an individually optimized cooling ceiling with PCM. Specifically, two prototypes of PCM cooling ceilings were investigated regarding their dynamic thermal behavior before being implemented in the EEC (Klinker et al 2014). (Weinläder, Klinker, and Yasin 2016).…”

“…During the measurements the room and surface temperatures, as well as the heat fluxes are monitored. Detailed description of the measurement setup is included in the publications of (Konstantinidou, Klinker, and Weinlaeder 2014;Klinker et al 2012Klinker et al , 2014Klinker et al , 2015Weinläder, Klinker, and Yasin 2016;Chhugani et al 2017), along with detailed results of the respective measurements. to achieve both parts of the above mentioned validation, a comparison has been made between the numerical simulation from EnergyPlus® and the experimental research of and (Göbel et al 2017) performend by the ZAE Bayern (ZAE 2019).…”

“…The two prototypes of cooling ceilings, shown in Figure 43 and Figure 44, address the improvement of thermal contact between PCM, cooling fluid and the ceilingsurface, but each with other priorities. Two types of PCM cooling ceilings were initially investigated for their dynamic behavior(Klinker et al 2014;Weinläder, Klinker, and Yasin 2016), the main difference of which is the positioning of the PCM layer. In cooling ceiling -type I -macroencapsulated PCM is put on top of a conventional cooling ceiling panel including water pipes.…”