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本建筑采用风机盘管加新风空调系统。由于空调房间较多，各房间要求单独调节，因此均采用风机盘管加新风空调系统。单设新风系统，独立供给室内，可随着室外气象变化进行调节，即把新风处理到室内参数，不承担房间负荷，保证室内湿度与新风量要求。这种方案既提高了该系统的调节和运转的灵活性，且进入风机盘管的供水温度可适当提高，水管结露的现象可以得到改善。
6 空调水系统
空调水系统设计原则是要考虑到以最简单的系统管路，力求水力平衡，要注意网管的防垢，保暖和保冷的效果。按照供、回水管数量多少分为双管制、三管制和四管制。按照原理可分为开式和闭式系统。从建筑中可知，房间不需要同时供热和供冷，设计中管路不与大气接触，容易在最高点积存空气，所以选用闭式双管系统。冷热水共用一个管路，系统设置较为简单，初期投资较低。
The general illustrate of design
1 The source of design
Air conditioning system is the treatment of indoor air by artificial method of the temperature, humidity, cleanliness and air speed technology. But some places with certain temperature and humidity of the air, in order to meet the needs of users and the requirements of the production process and the improvement of labor health and indoor climate conditions. General reasonable process is: first make the outside air temperature and control the water full contact, saturated humidity corresponding, then the saturated air heated to the required temperature. When some of the original air temperature and humidity is too low, the heating or direct steaming, in order to ensure contact with water can become saturated air.
The task is to finish the ventilation and air-conditioning design of Punan center commercial building. Through this project design, student learn master the design method of the master air conditioning system and design steps; Get the inability of analyzing of question, solving the problem of practical engineering application; Understand of the air conditioning systems engineering knowledge and understanding of memory; Master air duct, water pipes, equipment selection and decorate; Master the calculation of duct and water pipes; Enhanced graphics ability; Train analysis, problem solving practical engineering application ability, Make the foundation of the reliable work for the future in indoor environment equipment engineering and public buildings the HVAC design, construction and operation management.
2 The general situation of the engineering
The building is located in Shanghai,which is applied with air fan-coil unit air conditioning system. The total construction area of design is about 9600 square meters. The commercial building stands 4 stories, each layer is 4.8 meters high.
3 The basic of Design
Design task request and the original information:
1) location: Shanghai. The function of the building in accordance with the basic plot, 1-4 layer are commercial.
2) based on their design and calculation of the load of pipe diameter, design drawing, each layer of ventilation and water plans were drawn.
Fig. 3) water system of underground and the respective independent drawing.
4) equipment and materials in their design calculation, selection of equipment in the original reference drawings.
5) underground and independent design of the chiller and auxiliary equipment, accessories, pipe network.
6) all the original frame to remove, add to your frame design.
7) finally forming drawings have: list of drawings, design, equipment and materials and the wind, water plan, water system map.
8) design documents must include load calculation and hydraulic calculation.
4 The main design work
This design is from whole the mansion of cold carry the calculation start, from the system reasonable, choose the type fit, protection measure legal and consider well the energy exhaust to wait the angle sets out, and proceed the analysis to the room of whole the mansion of each category type, give various different rooms to choose the air condition system reasonablely, and arranged the piping reasonablely according to the function of every kind of room.We chose the HongYe software to calculate the cold burthen, and compute cold to carries to choose the cold and hot source according to, the energy that contrasted every kind of fueling price and electricity the price and considered the aftertime while choosing boiler variety circumstance.According to the each room of cold carry and needs of send to the amount of breeze chose the homologous air condition bitter end product.On the water system design, we accordinged to a solid example, combine proceeding the water power computes, considering the water power well out of tune, under several systems of more just chose the system.Contrasted breeze system very much several systems, distribute to the current of air of the room, choose to send the breeze method most reasonablely.In system designing well in consideration of prevent fire row smoke, a control, antisepsis etc. problem.