In　order　to　solve　the　heat　accumulation　problem　of　GSHP　system　in　cooling　load　dominated　area　with　high　humidity　in　summer,　this　paper　presents　a　novel　HGSHP　system　based　on　CT　cool-storage　in　transition　season.　Then　the　performance　evaluation　model　for　HGSHP　system　is　built　on　the　base　of　the　heat　and　moisture　transfer　principle　of　CT,　the　GHE　multiple　borehole　finite　line　heat　source　model　and　TRNSYS　software.　At　last,　using　the　evaluation　model,　an　actual　project　in　Nanjing　is　used　as　an　example　to　predict　the　thermal　performance　of　this　novel　HGSHP　system.　The　results　show　that　using　novel　HGSHP　system,　the　heat　accumulation　problem　can　be　well　solved.　(C)　2016　Published　by　Elsevier　Ltd.