To　reduce　the　power　consumption　of　the　cooling　system　in　the　data　center　effectively,　a　prototype　of　the　integrated　cooling　unit　with　rotary　booster　and　compressor　was　developed,　and　the　operating　characteristics　were　tested　comprehensively　according　to　its　cooling　requirements　throughout　the　year.　A　data　center　model　reflecting　the　characteristics　of　energy　consumption　and　environmental　requirements　was　established,　the　energy　consumption　characteristics　and　influencing　factors　of　the　model　data　center　when　the　integrated　unit　was　used　to　meet　its　yearly　cooling　requirements　in　the　typical　climate　zones　in　China　were　simulated　by　DeST　software　based　on　the　measured　characteristics　of　the　integrated　cooling　unit.　The　results　showed　that　compared　with　the　traditional　computer　room　air　conditioner,　the　energy-saving　ratio　of　the　integrated　system　can　be　as　high　as　39.55%　for　the　whole　year,　and　the　energy-saving　effect　is　remarkable.　The　energy-saving　potential　of　the　integrated　unit　becomes　more　significant　while　the　heat　transfer　coefficient　of　the　envelope　structure　becomes　larger,　and　the　load　rate　of　IT　equipment　and　the　annually-averaged　ambient　temperature　lower.　(C)　2020　Elsevier　Ltd　and　IIR.　All　rights　reserved.