在通风排烟设计方面，各房间使用自然排风，在楼梯间和电梯前室的部位选择设置竖井进行机械加压排烟，卫生间排风设计为排风扇直接排至室外。

general information of the design

  This design for the Shanghai Tong Ye training floor air conditioning and ventilation system design。 The training floor as part of the high-rise office buildings, underground, the ground level 11, building a total height of 52。8 m, with a total construction area of 13688。58 ㎡。The garage and equipment room to use for the underground layer, the ground level 11 are in office, dining room。 The main functions of the building are in the classroom, between body exercise room, rooms, dining room, multi-function hall, etc。 The whole building cooling load is 1669。624 KW, the whole building adopts water cooling unit for centralized supply air conditioning mode。

  By using Hong Ye HVAC Load software to calculate the load of each room, including outdoor meteorological parameters used in the Shanghai area, each room interior parameters varies according to different purposes。

  Consider the building as part of the office building, air conditioning running time is unified, mainly concentrated in the work time。 In order to make the independent control of each room, and considering the factors, determine the selection of fan coil and a new system。 In the room dark horizontal installed fan coil units。 Fresh air unit from introducing outdoor air to mix with air supply side, processing to enthalpy points, such as indoor does not undertake indoor load, by square diffuser into indoor。 (outdoor air through air unit cooling dehumidifying treatment to enthalpy state points such as indoor, indoor air through the fan coil cooling dehumidification to state point, fresh air is mixed with air supply side to supply state point, and then into the interior。)

  By calculating the cooling load and moisture load and the new air volume, to calculate the total supply air and cold quantity, fan coil air output and quantity of cold, is used to select models, and the Numbers of fan coil units。 Fan coil units to undertake indoor cooling load and fresh air units to undertake new wind load, so in each layer set a fresh air units to undertake new wind load。 The choice of fresh air unit is by each layer of the new air volume and air load to decide。

  According to building the total load for chiller type selection, the design of two screw water chiller。 Good balance screw and small vibration; Simple and compact structure, light weight; Efficiency is high, but the noise is bigger, so it is set in the underground room。

  In the design of the wind system, choose high effective utilization of rectangular duct, pipe, choose high strength, good fireproof performance of galvanized steel pipe。 Duct line layout as far as possible choose shorter straight lines, branch pipe less as far as possible, and to set the valve in proper place, so that maintenance detection。 Duct sizes indeed rule is calculated by assuming that the velocity method, the first thing to assume a reasonable wind speed, calculate the area of the wind pipe on the basis of known wind quantity, which in turn can be concluded that the size of the duct。 Square diffuser air supply and air supply mode selection at the top of the tuyere uniform layout。 Finally duct hydraulic calculation, the calculated pressure loss and the resistance, through adjusting the loop between the whole loop to the loss of pressure difference of the balance。

  Water system adopts closed with two control programs, water supply pipe set on gate, set electric two-way valve on the return pipe。 First draw axonometric drawing air conditioning water system, and the numbered paragraphs pipe, and then determine the pipe diameter, calculate the actual velocity of each section, the most disadvantageous pipeline of local resistance and frictional resistance, and adjust each branch pipe diameter by balance calculation, and finally calculate the total resistance and total water flow, head, etc。, can choose water pump and cooling tower。 Through the flow and head for the pump selection, cold water pump three, and a case, the cooling tower is located in the roof。 If volume expansion as the water temperature rise to a surplus, and can discharge excess air in the system, the system of constant pressure filling water, you need to join the expansion tank in the system。