In　order　to　improve　the　application　of　renewable　energy　in　cold　regions　and　overcome　the　drawback　of　the　low　performance　of　traditional　air　source　heat　pumps　(ASHP)　in　a　low　temperature　environment,　a　novel　type　of　dual-source　heat　pump　system　is　proposed,　which　includes　a　heat　pump,　photovoltaic–thermal　(PVT)　modules,　an　air　heat　exchanger,　and　phase-change　energy　storage　equipment.　In　response　to　different　outdoor　environmental　parameters,　the　heat　pump　can　use　the　PVT,　ambient　air,　or　solidification　latent　heat　of　water　in　the　ice　tank　as　the　heat　source.　This　study　focuses　on　analyzing　the　applicability　of　this　novel　system　in　residential　buildings.　Firstly,　the　thermodynamic　performance　of　the　system　under　typical　operating　conditions　is　experimentally　analyzed,　proving　that　the　system　can　effectively　utilize　solar　energy　under　low　solar　irradiation.　Then,　the　operational　strategy　of　the　system　is　optimized　with　the　optimization　goal　of　system　exergy　efficiency.　Finally,　the　continuous　operation　performance　of　the　system　in　winter　is　simulated　and　analyzed.　The　results　show　that　the　utilization　ratio　of　solar　energy　reaches　2/3　in　winter.　Compared　with　the　traditional　ASHP　system,　the　energy-saving　rate　of　the　novel　system　is　73.6　%,　which　can　reduce　the　carbon　emissions　by　69　%.　These　results　provide　technical　guidance　for　the　application　of　the　novel　system　in　residential　buildings　in　cold　regions.　©　2023　Elsevier　Ltd