Establishing Boundary Conditions Considering Influence Factors of the Room Equipped with a Ceiling Radiant Cooling Panel

Sang-Hoon Park,Dong-Woo Kim,Myoung-Souk Yeo,Seong-Ryong Ryu,Goo-Sang Joe,Kwang-Woo Kim

doi:10.3390/en13071684

Abstract

The objective of this study is to establish boundary conditions to evaluate the cooling capacity of the Cooling Radiant Ceiling Panel (CRCP) considering the environment of a room equipped with the CRCP. The current study investigated the boundary conditions and derivation techniques from previous studies. Based on the results of the analysis, a heat transfer model was derived for a room fitted with CRCP. In addition, the heat transfer model was used to derive the factors affecting the cooling capacity of the CRCP and each factor was simulated and verified through this model. The effects of these factors on the capacity of the CRCP was established by using various boundary conditions. To verify the validity of the simulation model, the experimental results were compared with the cooling capacity for a specific case. As a result, it was established that even for the same panel, there was a variance in the cooling capacity of the CRCP based on the boundary conditions and that the influence of the surface exposed to the outdoors had more implications. Consequently, this study presents the influence factors to be considered when designing CRCP.

Highlights

Cooling Radiant Ceiling Panel (CRCP) is a system that uses cold water to reduce the thermal load and is installed on the ceiling of buildings [1]
According to the results of this study, it can be seen that the cooling capacity of the CRCP varies depending on the boundary conditions
When the space in which the CRCP is installed is exposed to a large area of outside air, and when the outdoor temperature is high, the nominal cooling capacity of the panel could be overestimated

Summary

Introduction

Cooling Radiant Ceiling Panel (CRCP) is a system that uses cold water to reduce the thermal load and is installed on the ceiling of buildings [1]. CRCP can be applied to homes and to spaces with large ceiling areas such as classrooms [2]. In order to eliminate the thermal load efficiently, it is crucial to estimate the cooling capacity of the CRCP [3]. It is necessary to evaluate the cooling capacity on the boundary condition when the panels are installed in the actual building (Figure 1). Cooling capacity of the Cooling capacity of Evaluation the CRCP; of (b)the over or underestimated cooling Radiant capacity.Ceiling Panel (CRCP): (a) cooling capacity the CRCP;of(b) or underestimated Figure 1.of

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Conclusion