Using　ASHP　for　space　heating　is　an　environmental　solution.　Based　on　the　concept　of　Lorenz　cycle,　an　ASHP　is　proposed.　Taking　a　residential　community　as　an　example,　this　study　proposes　a　thermodynamic　model.　Then,　the　energy　consumption　and　carbon　emission　performance　of　the　heating　system　are　discussed.　The　results　indicate　that　the　primary　energy　consumption　of　ASHP　is　13.45%　less　than　the　coal-fired　boiler　and　the　carbon　emission　reduces　by　1203.6　tCO2.　This　study　is　meaningful　for　the　development　of　air　source　CO2　heat　pump　for　space　heating　integrated　with　DMS.　©　Published　under　licence　by　IOP　Publishing　Ltd.