摘要现代建筑的迅猛发展，使建筑能耗成为了能源消耗的重要组成部分。
目前能源紧缺，环境污染日益突出，使绿色节能，低碳环保成为大家普遍的认识。
因此，如何成功的设计健康、舒适、低碳节能的中央空调工程是本工程的主要目的。
本工程为长沙某经济大厦，占地面积为13000m2，建筑为裙楼+双塔楼结构，地下两层，一至二层为裙楼，三至二十四层为塔楼。
裙楼及西塔楼为政府机关办公用，东塔楼为高档商业写字楼，主要使用空调区域为办事大厅、展厅、餐厅、会议室、办公室、网络通讯机房等，建筑总高度94.2m，总建筑面积为63804.9m2，其中空调区域面积为36120.7m2。
空调总冷负荷3811.6kW，总热负荷为2315.9kW，此次设计为大楼的中央空调、通风防排烟及餐厅生活热水的设计。
根据国家及长沙市的相关文件政策，结合该项目的实际，本工程裙楼部分主要采用常规的冷水机组加锅炉作为空调冷热源，东、西塔楼采用节能环保的地埋管地源热泵与多联机结合的复合型水冷式多联机系统，同时局部空调区域，因甲方的要求，采用了风冷式多联机系统。
在设计中，300人会议室和120人电视电话会议室我们采用了新颖节能的座椅送风系统；裙楼一层大空间的一次回风集中空调系统中，进行了过渡季节全新风运行的设计；新风量需求较多的大区域，采用了全热新风交换器送新风，有效回收排风的余热；在厨房这块，采用了空气能热水机制取餐厅生活热水，总的来说，整个系统能较好的把节能环保的要求融入到设计中，使整个工程既能满足舒适要求，又能达到降低建筑能耗的双重目的。
具体内容包括：冷热负荷计算；冷热源方案比较和选择；空调末端处理设备的计算和选型；室内送风方式与气流组织形式的选定；风系统的设计与计算；水系统的设计；多联机空调的设计；地埋管系统的设计；消声隔振设计；自控设计；机房布置；正压送风系统、排烟系统及通风系统的设计等内容。
本设计我们是四个人一组，每个人都有明确的分工。
王健负责裙楼部分（除大会议室）的空调及餐厅生活热水的设计；代进负责裙楼大会议室座椅送风空调设计及裙楼冷热源的设计；熊文祥负责塔楼复合型水冷式多联机空调及地埋管的设计；周武负责的是系统自控和防排烟设计。
关键词：地埋管地源热泵、水冷式多联机、座椅送风、厨房热回收ABSTRACTThe rapid development of modern architecture, the building energy consumption important part of energy consumption. Current energy shortage and environmental pollution energy, low-carbon environmental protection become a common understanding. So, energy-saving centralair conditioning works is the main purpose of this project.This project is building an economy in Changsha, covers an area of 13000m2, building structure for the podium and twin towers, underground layers, one to two for the podium, three to twenty four for the tower. Podium and West Tower office for government agencies, East Tower, area for the use of air conditioning service area of 63804.9m2, an area where air conditioning is 36120.7m2. Total air conditioning cooling load 3811.6kW, total for the building's central air-conditioning, ventilation, domestic .In accordance with national and relevant documents Changsha policy, combined with the actual project, the project part of the main podium with conventional chillers plus boiler as cold and of water-cooled multi-line system, while local air conditioning area, due to the requirements of Party, using the air-cooled multi-line system. In the design, 300 meeting rooms and 120 television and telephone conference room we used a novel energy-seat air supply system; podium floor large space a return air central air conditioning system, make a transition season fresh air operation design; fresh air needs more large area, with a total the kitchen, using air to water domestic be better to put energy saving environmental protection requirements into the design, so the whole project can meet the comfort requirements, but also to reduce building energy consumption dual purpose.Topics include: ; cold source program comparison and selection; air terminal and selection; Indoor air supply and air distribution in the formof selection; air system design and calculation; water system design ; multi-line air conditioning design; underground pipe system design; muffler vibration design; automation design; room layout; positive pressure air supply system, exhaust system and ventilation system design and so on.The design we are four pairs, each person of labor. Wang Jian responsible podium part (except large conference room) air-conditioning and ; generations into responsible podium large conference room seats air conditioning cold and and the design of the podium; Xiong Wenxiang responsible for the tower complex multi-line water-cooled air-conditioning and underground pipe design; Zhou Wu is responsible for self-control and anti-smoke system design.Keywords：Ground source ——内围护结构传热形成的冷负荷（W）；∆tls——邻室计算平均温度与夏季空调室外计算日平均温度的差值（℃）。
3、外玻璃窗瞬变传热引起的冷负荷在室内外温差的作用下，玻璃窗瞬变传热形成的冷负荷可按资料[1]式(7.2.7-3)计算：（2.4）式中：CL Wc——外窗传热形成的逐时冷负荷（W）；K——外窗的传热系数（W㎡·K）；从表1.1中查取；F——外墙或外窗的传热面积（㎡）；t wlc——外窗的逐时冷负荷计算温度（℃）；401办公室围护结构瞬变传热形成的冷负荷，计算结果列于表2.2中。
表2.2 401办公室围护结构瞬变形成的冷负荷（1）北外墙瞬变传热形成的冷负荷单位：W时间7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:0032.6 32.3 32.1 31.8 31.6 31.4 31.3 31.2 31.2 31.3 31.4 31.63.10.9433.6 33.3 33.1 32.8 32.6 32.4 32.3 32.2 32.2 32.3 32.4 32.6267.6 7.3 7.1 6.8 6.6 6.4 6.3 6.2 6.2 6.3 6.4 6.6 KF 0.89×17.64=15.70CL 119.3 114.6 111.5 106.8 103.6 100.5 98.9 97.3 97.3 98.9 100.5 103.6（2）西外墙瞬变传热形成的冷负荷单位：W时间7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:0038.2 37.8 37.3 36.8 36.3 35.9 35.5 35.2 34.9 34.8 34.8 34.92.40.9438.2 37.8 37.3 36.8 36.4 36.0 35.6 35.3 35.1 35.0 35.0 35.12612.2 11.8 11.3 10.8 10.4 10.0 9.6 9.3 9.1 9.0 9.0 9.1 KF 0.89×33.05=29.41CL 358.8 347.0 332.3 317.6 305.9 294.1 282.3 273.5 267.6 264.7 264.7 267.6（3）北外窗逐时传热形成的冷负荷 单位：W 时间 7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 t wlc 29.5 30.4 31.2 32.1 32.9 33.6 34.2 34.6 34.6 34.5 34.2 33.7 t n 26 K3.06 F 1.5×2.1×4=12.6CL Wc 134.9 169.6 200.5 235.2 266.0 293.0 316.2 331.6 331.6 327.7 316.2 296.9（4）南内墙瞬变传热形成的冷负荷 单位：W()()2.3672616.3124.3084.1Wn =-+⨯⨯=-∆+=n ls wp t t t KF CL（5）东内墙瞬变传热形成的冷负荷 单位：W()()4.4012616.3105.3384.1Wn =-+⨯⨯=-∆+=n ls wp t t t KF CL2.2.2 透过玻璃窗的日射得热形成的冷负荷透过玻璃窗日射得热引起的冷负荷可按资料[1]式(7.2.7-4)计算：（2.5）（2.6）式中：CL C——透过玻璃窗进入的太阳辐射得热形成的逐时冷负荷（W）；C clC——透过无遮阳标准玻璃太阳辐射冷负荷系数；Cz——外窗综合遮挡系数；C W——外遮阳修正系数，本设计取1；Cn——内遮阳修正系数；Cs——玻璃修正系数；D max——夏季日射得热因数最大值；Fc——窗玻璃净面积（㎡）。