Replacing　fuel-fired　boilers　by　using　efficient　heat　pump　plants　to　recover　industrial　waste　heat　is　an　effective　solution　to　achieve　the　＇dual　carbon＇　target.　Three　novel　transcritical　CO2　high-temperature　heat　pump　systems　(Ej-Evap2-A,　Ej-Evap2-B,　and　Ej-Evap2-C)　are　proposed　in　this　study,　by　introducing　the　technique　of　dual-temperature　evaporation　realized　with　an　ejector　for　cascade　heat　absorption　from　the　heat　source.　Considering　the　application　in　the　scenario　of　industry　requirement　of　hot　water　heating,　the　life　cycle　performances　of　the　new　proposed　heat　pump　systems　and　fuel-fired　boilers　are　comprehensively　studied　from　the　perspectives　of　energetic,　emissions,　and　economic.　A　sensitivity　analysis　about　the　new　configuration　heat　pump　system　is　also　conducted　considering　the　variation　in　electricity　and　coal　price.　The　results　demonstrate　there　exists　an　optimum　discharge　pressure　that　maximizes　the　coefficient　of　performance　(COP).　Ej-Evap2-C　shows　a　maximum　COP　of　4.85,　which　is　14.40%　higher　than　the　baseline　CO2　heat　pump　system　(Base),　and　the　exergy　efficiency　of　Ej-Evap2-C　is　7.86–15.19%　higher　than　that　of　Base.　Among　the　eight　heating　methods　including　coal-fired　boilers　(CFB),　gas-fired　boilers　(GFB),　electric　heating　boiler　(EHB)　and　five　kinds　of　CO2　heat　pump　systems,　Ej-Evap2-C　shows　the　least　pollutant　emissions　and　life　cycle　cost.　Furthermore,　Ej-Evap2-C　has　the　shortest　payback　period　of　fewer　than　7　years　compared　with　the　CFB.　The　dual-temperature　evaporation　CO2　high-temperature　heat　pump　is　promising　to　substitute　traditional　fuel-fired　boilers　to　generate　high-temperature　fluid　in　the　future.　©　2022　Elsevier　Ltd