The　integration　of　phase　change　materials　(PCMs)　in　the　building　envelop　is　an　efficient　way　to　reduce　the　building　energy　consumption.　To　accelerate　PCM　components　heat　storage　process　and　increase　the　heat　storage　quantity　in　the　building　envelope,　the　mechanical　ventilation　was　used,　and　the　heat　storage　process　of　PCM　components　and　the　application　effect　of　the　mechanical　ventilation　was　studied　by　conducting　relevant　experiments.　Changes　of　component　temperatures　and　surface　heat　fluxes　at　different　air　temperatures　and　air　velocities　were　analyzed,　indicating　that　the　increase　of　the　supply　air　temperature　and　the　supply　air　velocity　led　to　shorter　phase　change　periods　and　higher　average　surface　heat　fluxes.　For　the　whole　component,　when　the　air　temperature　was　increased　from　34　degrees　C　to　40　degrees　C　at　an　airflow　rate　of　1　m/s,　the　phase　change　period　decreased　by　1.3　h.　Changing　the　air　temperature　from　34　degrees　C　to　40　degrees　C　at　2.5　m/s　provoked　an　increase　of　the　average　heat　flux　during　the　melting　process　from　33　W　to　63　W.　Considering　the　fan　energy　consumption,　the　energy-saving　ventilation　method　was　proposed　and　three　new　parameters　(system　energy　saving,　component　energy　utilization　and　system　coefficient　of　performance)　were　defined　to　evaluate　the　energy　saving　potential　of　the　PCM　component.　(C)　2016　Elsevier　B.V.　All　rights　reserved.