大型空冷冻水系统设计ppt课件

1、Large Chilled Water Systems Design Seminar大型空冷冻水系统设计Bell & GossettITT IndustriesSection I. IntroductionSection I. Introduction第一章第一章. . 简介简介HVAC Trends空调系统趋势 Cheap energy gets more expensive 廉价的能源变得愈来愈贵 Search for energy efficiency 寻觅更有效率的设备 Major HVAC energy users: 空调系统中, 最耗电的部分 Fans 风扇 Chillers 冷冻

2、机 Cooling Towers 冷却塔 Pumps 水泵Equipment Changes 设备的改动 Fans 风扇 Variable Speed Drives 变频器 Chillers 冷冻机 Lower kW/ton 更少 kW/ton Variable Speed Drives变频器 Cooling Towers 冷却塔 Variable Speed Drives 变频器 Pumps 水泵 Variable Speed Drives变频器Old HVAC System Design早期的空调系统设计 Multiple building operation 多栋建筑物的操作 Stand

3、 alone chillers 独立的冷冻机 Poor efficiencies 效率差 Part load conditions 部分负载Modern HVAC Systems现代的空调系统 Multiple building operation 多栋建筑物的操作 Single chiller plant 单一个冷冻机房 Multiple parallel chillers多台并联的冷冻机 Good efficiencies 高效率 Minimizing part load conditions 减少部份负载Campus System Example 例子40 buildings with

4、individual 150 ton chillers, 0.8 kW/ton full load, 1.2 kW/ton part load, three-way valve system40 栋大楼各有一台150吨的冷冻机, 满载时效率0.8kW/ton, 部份负载时效率1.2kW/ton,三通阀系统40 bldgs x 100 ton/bldg x 1.2 kW/ton= 4800 kWhCampus System Example例子40 buildings with three 2000 ton chillers, 0.52 kW/ton full load, 0.7 kW/ton p

5、art load, two-way valve system40 棟大樓各有三台2000噸的冷凍機, 滿載時效率0.52kW/ton, 部份負載時效率0.7kW/ton,二通閥系統40 bldgs x 100 ton/bldg x 0.52 kW/ton= 2080 kWhSimple example shows :简单例子显示:2720 kW/hr (57%) reduction in power used by the chillers有2720kW/hr(57%) 的节能效果Additional savings seen in:其它的节能效果:Cooling towers 冷却塔Pump

6、ing systems 水泵系统Campus System Example 例子 Savings will not be realized without variable volume pumping.假设系统没有修正成变流量系统的话，这些节能效果也就很难达成 The final design is the engineers choice:最后的设计是工程师的选择: available options 能够的选举 design tools available 能够的设备 judgment in making compromises 决议折衷的方法 consider the whole pi

7、cture 思索方案的规模Campus System Example 例子Consist of 包括:A Source System. 制造系统A Load System. 负载系统An Air Management/Expansion System 空气处置系统A Pump System. 水泵系统A Distribution System 送水系统Hydronic Systems水路系统CHILLERCHILLERReturn 回水Supply给水Primary-Secondary 共有管路CommonCHILLERLoad System 负载系统Source System制造系统Prim

8、ary Pumps 一次侧水泵Distribution System送水系统Secondary Pumps二次侧水泵Expansion System空气处置系统Typical Chilled Water SystemTypical Chilled Water System冷冻机系统冷冻机系统System Classifications系统分类Supply 给水Terminal终端负载BalanceandServiceValve平衡阀2-WayControlValve二通控制阀Return 回水Service Valve维修阀Air 空气Load System 负载系统HeatSourceLoa

9、dHeatDistributionPipingAir ControlRejectionHeatSource System 冷冻水制造系统热热热排热主机负载送水管路空气处置Air Management 空气管理SystemVent系统管路Rolairtrol气水分别器FromSystem由系统Vent管路Diaphragm Tank气压罐ThermalLoopLock ShieldValvePNPCTo System至系统Air ChargeAir ChargeSystem Fluid 系统流体System Fluid系统流体Low Temperature Condition低温的情况High

10、Temperature Condition高温的情况System系统System系统Effect of Temperature Change温度转变的影响Standard Compression TankStandard Compression Tank规范的紧缩气压罐规范的紧缩气压罐Diaphragm TankDiaphragm Tank隔膜式膨胀气压罐隔膜式膨胀气压罐Bladder TankBladder Tank囊袋式膨胀气压罐囊袋式膨胀气压罐Types of Tanks 气压罐的种类Standard Compression TankStandard Compression Tank规范

11、的紧缩气压罐规范的紧缩气压罐System Connection系统接合处Diaphragm TankDiaphragm Tank隔膜式膨胀气压罐隔膜式膨胀气压罐System Connection系统接合处Air Charge充气口Bladder TankBladder Tank囊袋式膨胀气压罐囊袋式膨胀气压罐System Connection系统接合处Air Charge充气口Service Valve维修阀Pump 水泵Triple DutyValve三功能阀SuctionDiffuser弯头过滤器TMPump System水泵系统Single suction base mounted an

12、d in-line端吸泵及管道泵Double suction vertical and horizontal split case 程度分壳泵Types of Pumps水泵种类 Single pump单台水泵 Parallel pumps并联水泵 Constant speed pumps定速水泵 Variable speed pumps变速水泵Pump Configurations水泵安装CHILLERCHILLERReturn 回水Supply给水Primary-Secondary 共有管路CommonCHILLERLoad System 负载系统Source System制造系统Prim

13、ary Pumps 一次侧水泵Distribution System送水系统Secondary Pumps二次侧水泵Expansion System空气处置系统Distribution SystemDistribution System送水系统送水系统Direct return piping直接回水管路系统Reverse return piping逆回水管路系统Zone piping区域管路系统 Piping Systems 配管方法 Constant volume pumping定流量送水管路 Direct pumping直接送水管路 Primary-Secondary pumping一次侧二次侧送水管路 Primary-Secondary-Tertiary pumping一次