Incorporating　phase　change　materials　(PCM)　into　multi-glazed　windows　(MW)　has　been　recognized　as　an　effective　way　to　regulate　the　indoor　thermal　environment　and　reduce　the　energy　consumption　of　buildings.　However,　the　design　and　calculation　of　PCM-filled　multi-glazed　windows　(MW　+　PCM)　remain　challenging　due　to　the　lack　of　general　transient　simulation　methods　and　integrated　tools.　To　address　this　issue,　the　present　study　developed　a　dynamic　coupled　thermal　and　optical　model　for　MW　+　PCM　based　on　the　enthalpy-temperature　and　interface　energy　balance　methods.　Then,　the　model　was　implemented　in　C++　and　integrated　into　the　TRNSYS　software　as　a　new　module　(Type　2602).　In　parallel,　a　test　platform　comprising　two　test　chambers　was　established　to　evaluate　the　effect　of　PCM　on　the　thermal　and　optical　properties　of　the　window　and　to　validate　the　newly　proposed　module.　It　was　found　that　compared　to　the　traditional　triple-glazed　window　(TW),　the　PCM-filled　triple-glazed　window　(TW　+　PCM)　effectively　reduces　the　irradiance　through　the　window　by　34.17　%　and　the　maximum　temperature　of　the　inner　surface　by　approximately　5.56　°C.　While　the　increase　in　external　surface　radiation　flux　density　from　600　to　1200　W/m2　has　a　diminishing　effect　on　the　heat　flux　variation　rate　during　the　heat　dissipation　process　for　TW　+　PCM,　it　effectively　shortens　the　latent　heat　absorption　time　by　0.50　h　and　increases　the　temperature　difference　between　the　inner　and　outer　surfaces　by　3.02　°C.　The　new　module　demonstrates　satisfactory　accuracy　through　experimental　validation　and　simulation　comparisons,　with　the　maximum　heat　flux　coefficient　of　variance　of　the　root　mean　square　error　(CV(RMSE))　less　than　6.35　%　and　11.25　%　under　TW　and　TW　+　PCM　configurations.　©　2024