电厂全厂失电工况润滑油冷却

1、电厂全厂失电工况润滑油冷却电厂blackout工况润滑油冷却方式 全厂失电工况，循环水中断，开式冷却水泵和闭式冷却水泵停止运行，转子惰转造成润滑油温持续上升。需要提供额外冷却水源防止供油油温超过60，防止转子低转速下油膜减薄造成磨损。 During black out, circulating cooling water will be cut down and operation of OCCW and TCS pump will stop, coasting down of turbine rotor will cause temperature increase of lube oil.

2、 So additional cooling water is needed to defense oil temperature at outlet of oil cooler exceed 60.电厂blackout工况润滑油冷却方式 目前厂家的意见是全厂失电期间，通过柴油发电机带一台TCS泵运行，减少润滑油温上升。 TCS泵功率较大，为380KW，影响了 柴油发电机设计负荷。电厂业主认为可以使用一台专用小功率冷却泵冷却润滑油，该泵可通过就地柴油机驱动，请厂家和设计院考虑可行性。 Opinion of manufacture is that operating one TCS pump b

3、y Diesel Generator, to decrease temperature uprise of lube oil. Power of TCS pump is more bigger value, it will affect design power of DG. owner think can use an additional little power cooling pump to cool lube oil, which will connected to a onsite Diesel engine to make sure this pump will be opera

4、ting during blackout . 电厂blackout工况润滑油冷却方式 业主已提出初步方案，在全厂停电工况下，通过手动操作，转启专用冷却水泵对润滑油进行冷却。 该初步方案已进一步细化，见方案1： Owner have provide preliminary case, during blackout condition, through manual operating, rotating the cooling pump to cool lube oil. The preliminary case has detailed additionally, details in ca

5、se 1.电厂blackout工况润滑油冷却方式 方案1：在全厂失电工况，手动关闭冷油器出入口冷却水阀门V3024A(V3024B)、 V3023A(V3023B)和V1032阀门；手动开启阀门a，启动专用冷却水泵，开启阀门b1(b2)，c1(c2)和d，使冷却水流过冷油器。 during black out, closing inlet and outlet cooling water valve V3024A(V3024B),V3023A(V3023B) and V1032 of oil cooler by operator, manual opening valve a, operati

6、ng special cooling pump, open valve b1(b2)，c1(c2) and d，make cooling water across oil cooler.电厂blackout工况润滑油冷却方式方案1优点：利用CST水位和凝汽器间的高度差、压力差减少冷却水泵的扬程。如通过水力计算确认可行，冷却系统可不使用冷却水泵。Advantage:Through elevation deference and pressure deference between water level of CST and condenser to decrease outlet pressu

7、re of cooling pump.If confirm after hydraulic calculation, cooling pump maybe cancel in cooling system. 方案1缺点：需要操作的阀门较多。在全厂失电情况下，有误操作的可能。冷却水在进入凝汽器前，因压力降低，有汽化的可能。Disadvantage:Valve should operating is much bigger. during black out, existing error operating.Before cooling water into condenser, cooling

8、 water maybe boiling because pressure decrease.电厂blackout工况润滑油冷却方式 方案2：在全厂失电工况，手动关闭冷油器出口冷却水阀门V3024A(V3024B)，手动开启阀门c1(c2)和阀门d。使TCS系统存水流过冷油器。通过TCS水箱和凝汽器间的高度差保证冷却水流速。 During black out, manual closing outlet cooling water valve V3024A(V3024B) of oil cooler, manual opening valve c1(c2) and valve d. Makin

9、g existing water in TCS system across oil cooler. Through elevation deference between water level of TCS surge tank and condenser to ensure velocity of cooling water.电厂blackout工况润滑油冷却方式方案2优点：冷却系统不需安装冷却水泵，专用管道阀门少。在全厂失电情况下，操作员的 操作少。Advantage:It doesnt need to set cooling water pump, special tube and v

10、alve is little. during blackout condition, 方案2缺点：TCS膨胀水箱存水20m3在10分钟后即已排空，排空后冷却水流速快速下降。可通过增加TCS膨胀水箱容积解决该问题。冷却水在进入凝汽器前，因压力降低，有汽化的可能。冷油器中冷却水流速低，换热效果差。Disadvantage:Existing water 20m3 in TCS Surge Tank will empty in 10min, after TCS Surge Tank empty, velocity of cooling water will decrease rapidly. The

11、question can Before cooling water into condenser, cooling water maybe boiling because pressure decrease.电厂blackout工况润滑油冷却方式 方案3：增设一台小功率专用TCS泵与现有三台TCS泵并联，专用TCS泵扬程、流量小于现有TCS泵。将专用TCS泵与柴油发电机相连。在全厂失电情况下，通过专用泵保证冷油器的冷却。 A dedicated TCS pump with less power will be added in parallel with current three TCS p

12、ump. Head and flow of this dedicated TCS pump is less than the current TCS pump. This dedicated TCS pump will be connected with DG. During blackout, this pump will be responsible for cooling oil cooler.电厂blackout工况润滑油冷却方式 方案4：在一台冷油器入口阀门V3023A前后加装管道，安设一台管道泵。在全厂失电情况下，关闭入口阀门V3023A ，开启阀门a和b。转启管道泵，通过TCS系

13、统管路存水冷却润滑油。 Plan 4: Pipes will be added before and after oil cooler inlet valve V3023A and pump is designed on this pipe line. During blackout, V3023A will be closed and valve a and b will open. The added pump will startup and residual water in TCS pipes is used to cool lube oil.电厂blackout工况润滑油冷却方式 方案4优点： 充分利用TCS系统存水冷却润滑油，系统变动少，风险小。 方案4缺点： 管道泵需要重新设计、采购，其进度和运行性能不能保证。 缺少布置管道泵的空间。 Advantages of Plan 4 Full use of residual water to coo