Performance analysis and design optimization of a novel Trombe wall system using CFD and response surface method

Abstract

To overcome the limitations of traditional Trombe walls , such as their single-function nature and summer overheating issues, this study proposes an integrated Trombe wall system with multichannel photovoltaic blinds (MPVBTW). A phase change material (PCM) is embedded within the multichannel structure to enhance thermal regulation. A two-dimensional computational fluid dynamics (CFD) model, integrated with an optical model and experimentally validated, was developed to analyze heat transfer through the MPVBTW. Coupled with a response surface method , the CFD model was used to investigate the sensitivities of design variables and determine the optimal operating conditions for the MPVBTW across various performance criteria. A comparative analysis with a PV blind Trombe wall (PVBTW) system, using a traditional Trombe wall as a baseline, revealed that the MPVBTW achieved a thermal comfort enhancement factor of 0.349, substantially outperforming the PVBTW's 0.103. Furthermore, the MPVBTW exhibited superior electricity generation , producing 2.45 % and 4.8 % more electricity than the PVBTW system in summer and winter, respectively. This study highlights MPVBTW's potential for efficient electricity generation , enhanced heating performance, and improved indoor thermal comfort.