The numerical simulation of radiant floor cooling and heating system with double phase change energy storage and the thermal performance

Phase change materials in thermally activated building systems: A comprehensive review

“…Xu et al 102 They found that for the large spaces, double layer PCMs could enhance thermal comfort by 7.45% at the expense of increased energy consumption by 5.14%. They also found that increasing the PCM thickness boosts energy saving.…”

“…Xu et al 102 investigated numerically a radiant floor serving both cooling and heating demands with two layers of paraffin PCM to quantify the effect of the supply water temperature on the melting and solidification processes of the PCM. The heating (lower layer) and cooling (upper layer) PCM layers had melting temperatures of 30°C and 19°C, respectively.…”

“…Ren et al 103 also studied numerically the double PCM layer concept in the floor but they added a radiant panel in the ceiling, containing a cold storage PCM layer. They adopted the same melting temperatures and layer arrangements in the double layer floor in Reference 102, whereas the new ceiling layer was set at 19°C. They found that the system can ensure room temperatures around 19°C and 26°C when the ambient temperature is 12°C and 32°C in winter and summer, respectively.…”

Heat transfer characteristics of cascade phase change energy storage composite pipeline

“…Ghalambaz M [27] used the finite element method to study the influence of ambient temperature and the thickness of natural convection and phase change materials on paraffin phase change energy storage.The solidification process of paraffin was different in different structures, and Ghosh D [28] simulated it using enthalpy porosity.The research results showed that natural convection changes and heat flux differences caused by different shapes would lead to unequal solidification and melting time.Mao et al [29] proposed a new type of shell and pipe heat storage tank was presented. The results indicate that the heat transfer in PCM was accurate, and a 3-D unsteady heat transfer model was established.Patel V [30] proposed that the finite volume method can more accurately simulate the rapid solidification process of supercooled pure metals.Current studies on heat storage show that natural convection of PCM has a significant impact on its phase change and heat transfer characteristics [31]. However, there were few studies on the influence of PCM transition temperature zone on the thermal performance of composite energy storage tubes.This paper presents the rational structure of two PCM composite energy storage pipelines,the heat transfer mathematical model was built, the transformation equation was solved by finite volume method, and numerical simulation was performed.…”

Numerical Simulation of the Aluminum Column-Wing Type Refrigerant-Direct Radiant Cooling System

“…The heat transfer characteristics of radiant cooling systems have also attracted more attentions. Xu et al [5] developed a novel three phase zone numerical model of the capillary floor radiant cooling system, and studied the phase-change heat transfer characteristics, the best water supply temperature and the change rule of the surface temperature of the floor. A three-dimensional finite volume simulation of radiant cooling panel systems was established by Serageldin et al [6].…”