油池计算书.docx

1、油池计算书Calculation of oil pond and drainage pipe一、设计依据 input date： 1、主变压器总油重55.0吨，其典型密度为875Kg/m3； Total oil weight:55.0ton;density:875Kg/m3 2、按最大一台变压器的事故油量的100%考虑； As 100% of total oil weight are considered 3、排油管管径按20min将事故油排尽选择。 According to the total oil are drained within 20min.thus the pipe diamet

2、er can be confirmed. 4、流速0.6m/s ;velocity0.6m/s 二、主变油池计算calculation of oil pond with main transformerOil 体积V=55.0100%1000/875=62.86m3选用13.5m11.0m0.5m的油池，则 Adopt 13.5m(length)x4.0m(width) x0.5m(width)=74.25 m374.25 m362.86m3OK三、变压器事故油池计算 calculation of oil pond： 体积V=55.0100%1000/875=62.86m3 选用8.8m4.0

3、m的油池，则 Adopt 8.8m(length)x4.0m(width), So h油=V/(8.84.0)=1.79m；加上余量0.13m，则h取1.92m。 h油=V/(8.84.0)=1.79m；allowance 0.13m，adopt 1.92m。 油、水平衡时h排水=0.875h油 When oil and water are balance :h排水=0.875h油 h排水=0.875x1.92=1.68m h油 = h排水 +h h=h油-h排水=0.15m，即进油管与出水管的标高差为0.15m h=h油-h排水=0.15m，difference of elevation b

4、etween inlet and outlet is 0.15m 排油管管径宜按20min将事故油排尽。 the total oil are drained within 20min. 四、排雨水工况 drain rainwater condition： 油池进水管标高El. of inlet pipe of oil pond 3.10m； 出水管标高El. of outlet pipe of oil pond：2.95m； 进出水管管径diameter DN300； 池底标高 El. of oil pond bottom：0.65m； 最大小时降雨量 Maximum hourly rainf

5、all：50mm； 主变油坑面积AGTG TRANSFORMER： 13.5m11.0m=148.5m2； 高厂变油坑面积A HV UNIT AUX TRANSFORMER：7.5m6.5m=48.75m2 高备变油坑面积 ASTANDY AUXILIARY TRANSFORMER：7.5m12.5m=93.75m2 雨水流量Rain flow ：0.05x(148.52+48.752+93.75)=24.4m3/h（6.77L/s） 油池调节容量：8.8 4.0（2.95-0.65）=80.96m3 能满足3小时降雨量； Adjusting capacity of oil pond (80.

6、96m3) can satisfy 3 hours rainfall DN300管道输送能力为50.01L/s（数据来自雨水管计算书）6.77L/s The transportation capability of DN300 pipe 50.01L/s(the date from calculation of rainwater pipe)is larger than 6.77 L/s. So satisfy the requirment .配电楼靠近主变侧设置防火墙满足NFPA-850要求配电楼靠近主变侧设置防火墙，墙体为200厚加气混凝土砌块，耐火时间不小于2小时，整面墙不设窗户，一层的

7、门为防火门，耐火时间不小于2小时。可以满足NFPA-850要求。备变与GIS设备之间无需设备防火墙根据NFPA-850规范的相关要求，含油变压器与含油变压器之间要求设置防火墙。According to the NFPA 850 standard, it should be located the firewall between outdoor oil-insulated transformers. 规范的规定主要考虑到含油设备互相之间发生火灾会导致互相影响甚至助燃。Considering the fire will affect oil equipment each other, oil e

8、quipment.而GIS设备内部不含可燃物，含有惰性不燃气体SF6，根据850的要求与变压器之间不需设置防火墙。GIS contains Inert non-combustible gas (SF6). It not need be located the firewall according to NFPA850.详情可见NFPA-850 的Chapter 5 General Plant Design章节及NFPA-5000的相关章节。More detail refer to Chapter 5 General Plant Design of NFPA850 and relevant sections of NFPA5000.在委内瑞拉电厂或变电站我们可以看到，在室外配电装置区内的变压器也都没设置防火墙，间所附照片。结论：备变与GIS之间无需设防火墙