设计总说明:本次设计是上海尚高大厦的空调系统设计。尚高大厦属于中小型办公建筑，位于上海，四层大厦，建筑总高15m。尚高大厦的房间类型有营业大厅和办公室。营业大厅的面积较大，办公室的面积较之小。综合参考了多方面的因素，本次大厦的空调设计选择营业大厅使用全空气系统，办公室选用风机盘管加独立新风系统。

全空气系统在室外设空气处理机组，室内设回风管与送风管，室外机集中产生热/冷量，将从室内引回的回风（或回风和新风的混风）进行冷却/热处理，再送入室内消除其空调冷/热负荷。风机盘管加独立新风系统是要在房间的吊顶内暗装卧式的风机盘管，风盘结合从室外引入的处理过的新鲜空气对房间里的空气进行统一调节。在本次的设计中，每层的新风在新风机组内处理到房间空气的等焓值，承担少部分的房间冷负荷。风机盘管则需要负责处理房间内一小部分的新风湿负荷和房间里其他所有的冷负荷。当风机盘管没有启动运行时，经过处理的新鲜空气很有可能从装有过滤装置的回风管或送风管吹到房间里，房间里的卫生会受到影响。而且，新风和送风先进行混合然后再送到房间，会导致新风的压力和回风的压力很难平衡，会影响新鲜空气的输送。所以在本次设计中使用独立新风的配送形式，新风管不与回风管和送风管相连。吊顶里风机盘管的送风和回风使用上送上回的形式。

因为这次设计没有涉及到冷热源部分，所以在绘制图纸的过程中，假设在地下有一个机房。每层的供回水管通过同程式的设计连接，经过立管，与冷水机组和末端的风机盘管共同形成了一个回路。空调水路使用下供下回的形式，房间内的空气在风机盘管中经过处理会产生冷凝水，冷凝水部分本次设计没有考虑到水管水力计算中，而是就近排到了卫生间里。

在室内空调区冷负荷计算的基础上，绘制焓湿图，进行风机盘管风量和冷量的计算，通过风量和冷量进而完成对风机盘管的选型。选型之后在每个房间的吊顶内开始进行风机盘管的布置。风盘的位置确定后，开始绘制回风管，送风管，空调水路和新风管，其中新风管不连接空调而且只需要输送到室内即可。送回风管本次设计不予计算，接口尺寸就按照设备原装尺寸。按照每段新风管的新风量和规范的速度标准，计算出管径和最不利路径的阻力。从风盘接出供回水管组成水系统图。按照每段水管需要的水量和规范的速度标准，计算出每段水管的管径和水系统的最不利环路阻力。由计算得到的水系统最不利环路的阻力和所需要的总冷水量，就可以推荐给冷热源方面冷冻水泵的型号。

将空调风系统和水系统以及风管、水管平面图反映在建筑底图上，从而完成本次整个办公大厦的设计。

General description of the design

This design is the air conditioning system design of Shanghai SUNCOO building. SUNCOO building is a small and medium-sized office building, located in Shanghai, the four storey building, with a total construction height of 15m.

The rooms of SUNCOO building have business hall and office. The business hall has a larger area and smaller office space. Comprehensive reference to a number of factors, this building's air conditioning design business hall use the full air system, the office of the fan coil plus independent fresh air system.

The air conditioning unit is set outside the whole air system. The indoor air return pipe and air supply pipe are set up in the room. The heat / cooling amount is produced in the outdoor unit. The cooling / heat treatment will be carried out from the return air (or the air of the return air and the fresh air) returned from the room and then sent into the room to eliminate the cold / heat load of the air conditioning. The fan coil unit and the independent new wind system are to cover the room with the horizontal fan coil in the ceiling, and the air in the room is adjusted by the fresh air introduced from the outdoor. In this design, the fresh air of each floor deals with the equal enthalpy value of the room air in the fresh air unit, and takes a small part of the room's cold load. The fan coil unit is responsible for handling a small part of the fresh air load in the room and all other cooling loads in the room. When the fan coil does not start to run, the treated fresh air is likely to blow from a filter or air supply tube into the room, and the health of the room will be affected. Moreover, the new wind and the wind first mixed and then sent to the room, will lead to the pressure of the new wind and the pressure of the return air is very difficult to balance, will affect the delivery of fresh air. Therefore, in this design, the independent fresh air distribution mode is adopted, and the fresh air pipe is not connected with the return air pipe and the air supply pipe. In the ceiling, the air supply and return air use of fan coil units are sent upward.