|
|
| 民用建筑用电设备的需要系数Kx和cosφ |
|
|
|
|
民用建筑用电设备的需要系数Kx和cosφ·tgφ及计算公式
?Hi,Adios.?2015-07-1214:19:17
民用建筑用电设备的需要系数Kx和cosφ·tgφ表2.5.2-1序号用电设备分类Kxcosφtgφ1通风和采暖用电????????各种风机，空调器0.7～0.80.80.75????????恒温空调器0.6～0.70.950.33????????冷冻机0.85～0.90.80.75????????集中式电热器1.01.00????????分散式电热器(20kW以下)0.85～0.951.00????????分散式电热器(100kW以上)0.75～0.851.00????????小型电热设备0.3～0.50.950.332给排水用电????????各种水泵(15kW以下)0.75～0.80.80.75????????各种水泵(17kW以上)0.6～0.70.870.573起重运输用电????????客梯(1.5t及以下)0.35～0.50.51.73????????客梯(2t及以上)0.60.71.02????????货梯0.25～0.350.51.73????????输送带0.6～0.650.750.88????????起重机械0.1～0.20.51.734锅炉房用电0.75～0.850.850.625消防用电0.4～0.60.80.756厨房及卫生用电????????食品加工机械0.5～0.70.800.75????????电饭锅、电烤箱0.851.00????????电炒锅0.701.00????????电冰箱0.60～0.70.71.02????????热水器(淋浴用)0.651.00????????除尘器0.30.850.627机修用电????????修理间机械设备0.15～0.200.51.73????????电焊机0.350.352.68????????移动式电动工具0.20.51.738打包机0.200.601.33????????洗衣房动力0.65～0.750.501.73????????天窗开闭机0.10.51.739通讯及信号设备????????载波机0.85～0.950.80.75????????收讯机0.8～0.90.80.75????????发讯机0.7～0.80.80.75????????电话交换台0.75～0.850.80.75????????客房床头电气控制箱0.15～0.250.61.33民用建筑照明负荷需要系数Kx表2.5.2-2建筑类别Kx建筑类别Kx一般旅馆、招待所0.7～0.8一般办公楼0.7～0.8高级旅馆、招待所0.6～0.7高级办公楼0.6～0.7旅游宾馆0.35～0.45科研楼0.8～0.9电影院、文化馆0.7～0.8发展与交流中心0.6～0.7剧场0.6～0.7教学楼0.8～0.9礼堂0.5～0.7图书馆0.6～0.7体育练习馆0.7～0.8托儿所、幼儿园0.8～0.9体育馆0.65～0.75小型商业、服务业用房0.85～0.9展览厅0.5～0.7综合商业、服务楼0.75～0.85门诊楼0.6～0.7食堂、餐厅0.8～0.9一般病房楼0.65～0.75高级餐厅0.7～0.8高级病房楼0.5～0.6火车站0.75～0.78锅炉房0.9～1博物馆0.82～0.92单身宿舍楼0.6～0.7旅馆宾馆需要系数Kx和cosφ表2.5.2-3序号负荷名称需要系数Kx自然平均功率因数cosφ????????????????平均值推荐值平均值推荐值1全馆总负荷0.450.4～0.50.840.82全馆总照明0.550.5～0.60.820.83全馆总电力0.40.35～0.450.90.854冷冻机房0.650.65～0.750.870.85锅炉房0.650.65～0.750.80.756水泵房0.650.6～0.70.860.87风机0.650.6～0.70.830.88电梯0.20.18～0.22直流0.5交流0.8直流0.4交流0.89厨房0.40.35～0.450.7～0.750.710洗衣机房0.30.3～0.350.6～0.650.711窗式空调0.40.35～0.450.8～0.850.812总同时系数KΣ0.92～0.94照明用电设备的cosφ与tgφ表2.5.2-4光源类别cosφtgφ光源类别cosφtgφ白炽灯，卤钨灯1.00高压钠灯0.451.98荧光灯(无补偿)0.551.52金属卤化物灯0.4～0.612.29～1.29荧光灯(无补偿)0.90.48灯0.521.6高压水银灯(50～175W)0.45～0.51.98～1.73氙灯0.90.48高压水银灯(200～1000W)0.65～0.671.16～1.10霓虹灯0.4～0.52.29～1.73Pe:设备容量；Pjs：计算容量；Ijs:计算电流Pjs=KxPeKx:需要系数（查表）380/220V三相平衡负荷的计算电流：Ijs=Pjs/(1.732Uecosφ)220V单相负荷的计算电流：Ijs=Pjs/(Uedcosφ)Pe：额定功率Pj：计算有功功率sj：计算视在功率Ij：计算电流Kx：同时系数cosφ：功率因数Pj=KxPesj=Pj/cosφ单相供电时，Ij=sj/Ue三相供电时，Ij=sj/√3Ue假设采用~220V单相供电，同时系数Kx取1.0，功率因数cosφ取0.8，则Pe=13KWPj=131=13KWIj=1300/（0.8220）=7.39A
电气
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
