Research On The Economic Final Resistance Coefficient And Strategy Of Variable Fresh Air Volume In Clean Operating Room

With the continuous increase of the urbanization rate,the medical demand is getting higher and higher,the number of large-scale hospitals increases year by year,and the construction of the Clean Operation Department is gradually increasing,too.The airconditioning system of the clean operating room relies on air filtration and a large number of ventilation times to control the concentration of bacteria and the particulates at the specified level,which objectively leads to greater energy consumption.Projects usually adopt constant air volume system,limiting the use of the amount of the air cold,actually causing another form of energy waste.This article focuses on the filter of the airconditioning system,proposes the idea of replacing the filter in advance,and checks and optimizes the existing filter configuration so as to apply variable fresh air to achieve energy-saving purposes.This article describes a series of basic concepts and theories involved in the study:(1)Introduced the concept of particulates,atmospheric dust,TSP,PM10,PM2.5,and the filteristics of each grade filter.,and then point out that the particles above PM10 can not enter the clean operation room through the new wind,therefore,PM10 data can be used for calculation,but the calculation results of low efficient filter need to be modified;(2)Introduced the series efficiency of filter,the calculation method of dust tolerance,and the different filter level comparison table domestic and overseas;(3)Determined the type of the clean operating room,and introduces its purification principle and uneven distribution of dust concentration calculation model.This paper analyzed the filter configuration of the air conditioning system in clean operating room and simplified the model.Static theory and dynamic theory are established,according to whether considere that the concentration of outdoor air dust is unchanged.to calculate filter resistance,power and power consumption.It is found that after changing the strainer in different air volume,and replacing the strainer in advance,the energy saving rate of 0.2~20% can be obtained everytime replacing the filter,and the energy saving rate of the average replacement gets maximized at the end resistance coefficient of about 1.5,and the increased cost is also offset by the energy saving.Compared with the calculation results of the dynamic theoretical model,it can be found that the static model can reflect general trend,but the calculation of energy and energy saving rate is very different from that of dynamic model,which shows that the influence of outdoor atmosphere dust concentration on power consumption cannot be ignored.This paper analyzed the principle of energy saving in the air-conditioning system of comfortable air conditioning,constant temperature and humidity air conditioning and clean operating room air conditioning system.According to the load characteristics of clean operating room,this article puts forward 4 zone outdoor air model,and applys the fresh air strategy.This paper studies the influence and solution of the new wind model on cleanliness,and finally analyzes the economy,and obtains the conclusion that the operating room is economical and energy-saving.In summary,this paper focuses on the deployment of filters by the establish theoretical models and example analyses,and concludes that the early replacement of the filter can bring the energy saving income and a small amount of economic income,and the moderate improvement of the total filtration efficiency can realize the operation of all operation room variable volume and get large energy saving and economic income.