Study On Large Space's Environmental Elements Test Method And Control Strategy

Nowadays,in every field of human social life,there universally exists the large space building whose high and size are not less than 10m and 1000m3 respectively. This kind of large space building owns the characteristics of large area,large space,complex function of zone applying,seperateless zpnes and large human fluidity.Comparing with the air condition of ordinary mininature inside space, large space is typical of complexity,faintness,uncertainty and flexibility,which poses the newer and highter requirement for the realization of human body comfort by air conditioning system.Starting with analying the effect of environmental elements on humen body comfort, this thesis put forward that the change of air temperature in large space chiefly affects the human body comfort, consquently,to test the parameter of air condetion is to mainly to test the air temperature.After simulating the figure of summer delaminated air conditioning in large space be using the software of Compational Fluid Dynamics(CFD)AIR PAK2.1,I know the distribution of the temperature and speed field for air-conditioning zone in large space. Combing with the best choice of the number of delaminated air conditioning wind-sending holes in large space ,I ensure the best arrangement of temperature sensor in large space, and get the way of testing temperature in large space by using signal bus figure sensor DS1820.According to the characteristics of air conditioning system in large space such as complexity, faintness,uncertainty and flexiblity and basing on the principle variable air volume air conditioning system, this thesis provides the control strategy of controlling the wind system and the water-freezing sysrem by coordinating----to divide the whole zone into several small zones,to decide the bulk of the small space according to the space zone controlled by wind-sending holes, to adopt the different rewind-sending equipment for different small zone,to control every zone seperately, to adopt the control way of Variable Static Pressure Variable Temperarure(VPVT) in whole large space .Making good use of the figure of Predicted Mean Vote(PMV) and Back Propagation(BP) artificial neural network, I build the model of setting temperature in large space and the sample data of network training. All these have the reference value in reality about the air conditioning system of large space.