大厦空调系统设计+CAD图纸+回风管水力计算(3)
At present, the demand for central air conditioning the new air volume generally only 20 cubic meters per hour, or even lower, a lot of new air volume is very low of central air conditioning has been selling used; Second, foreign demand is higher, for central air conditioning air filter as mandatory requirements in effect filter, Japan will be severely punished. For central air conditioning using only simple screen pack in our country, many central air conditioning even reach efficient filter, also no punishment; Third, overseas for central air conditioning ventilation requirement is very high, and is a compulsory and domestic general no such request; Finally, foreign central air conditioning installed with air humidifying device generally, rarely seen domestic central air conditioning air humidifying device, also there are few companies voluntarily install air humidifying device. As a comprehensive office building, the ventilation requirements are relatively high, so to make full use of outdoor air. Construction area is large, the system of air, the burden of a fairly large air conditioning area.
In the design of the various types of rooms and the area is larger, there is also an open office, taking into account the full air system and the advantages and the disadvantages of fan coil plus fresh air system, decided to use all air system. All air system is fully borne by air to the room of the cold and heat load of the system. Air conditioning system by transmission of cold air to the room to provide sensible heat and latent heat of cooling capacity, cooling capacity of the air cooling and dehumidification process completely focused on the air conditioner room to complete the air handling unit, cold in the room no longer supplement; For transportation to the heating of the air inside the room can be in air conditioning room is complete, also can be done in each room.
6 air conditioning water system
In air conditioning design, water system usually includes: chilled water system and cooling water system, and centralized air conditioning room of decentralized air conditioning users supply cold heat, often with cold water as heat medium. Frozen water cycle process, water pump, chiller, terminal equipment, pumps. Depending on the return way, gravity and mechanical machine has two air conditioning water system, this design adopts mechanical, as a closed system. Air conditioning water into contact with the atmosphere, not only set in the highest point of the system expansion tank, piping system is not easy to produce dirt and corrosion, do not need to overcome the system into the pressure head (constant pressure expansion tank), pump energy consumption is relatively small. Because this design adopts full air system, water system design.
目录
1 设计依据 - 1 -
1.1 设计任务书 - 1 -
1.2 建筑平面图和剖面图 - 1 -
1.3 国家主要规范和行业标准 - 1 -
1.4 上海市设计计算参数 - 1 -
1.5 建筑围护结构的热工性能 - 2 -
1.6 设计范围 - 2 -
1.7 设计原则 - 2 -
2负荷计算 - 3 -
2.1 夏季空调冷负荷计算 - 3 -
2.1.1 围护结构冷负荷 - 3 -
2.1.2 室内热源散热形成的冷负荷 - 5 -
2.2 冬季热负荷的计算 - 7 -
2.2.1 围护结构基本耗热量 - 7 -
2.2.2 围护结构的修正耗热量 - 7 -
2.3 湿负荷计算 - 9 -
2.4 负荷计算数据 - 9 -
3 空调系统的选择 - 14 -
3.1 空气处理设备集中程度方案 - 14 -
3.2 全空气系统方案 - 17 -
3.3 风机盘管系统 - 18 -
3.4 方案的确定 - 19 -