AnaIysisofairconditioning system renovation in an office buiIding based on simuIation comparison

In thispaper,the old air conditioning system ofan office buildingisrenovated,two kindsof renovation schemesofwaterchillersandmulti-splitunitsarecompared,andtheinfluenceofstaffovertimeon system selectionisdiscussed.Firstly,theloadsimulationofthebuildingrenovationareaiscarriedout,andthe equipmentselection iscarriedoutforeachscheme.Then,theenergyconsumptionoftheHVAC system ofthe two schemesin the cooling and heating seasons is simulated and compared.The multi-splitsystem has lower energyconsumption andthepaybackperiodisonly4 . 6 a.Finally,basedonthesimulationanalysisofdifferent overtimemodesand overtime rates,the curve of energy consumption and overtime rates is drawn,and itis foundthatthemulti-splitsystem ismoresuitableforthebuildingswithovertimework.whentheovertimerate oftheindependent office is10% , the energy consumption of the multi-split system in the cooling season is 41 . 7% lowerthan thatofthewaterchillersystem.