Flash tank design for 30mw cpp.

[AnandV]

You will have to calculate the quantity of flashed steam first.
For this you need
(a) working poressure of the flash tank
(b) Flow & Temp parameters of the inlet drains,

there is a chart [

[link Point to another website Only the registered members can access]
Once you know the quantity of flash steam Q (Cum/sec), you can calculate the dimension of the vessel by fixing the velocity V of steam to a safe value (refer some handbook for this). It shoud be around 2-3 m/sec.
Area of vessel = Q/V
after getting the dia of the vessel i think it would be easy to get other parameters

[A.Venugopal]

Dear all,

I am awfully sorry that my intended reply was delayed due to preoccupation. Thanks also to others , the resources in Ashrae handbook, and spirax sarco charts help to calculate the flash vapor qunatity , but you can also do it from fundamentals by working on the enthalpies. The vessel size is by velocity of vapor , it is , at the operating conditions is 4 m/sec , yes , Mr Anand suggested correctly. Please find attached the calculation sheet. You need to add a common header amply dimensioned before the flash vessel to homogenize the different condensate streams .Vessel is to be designed for full vacuum . Frankly in a commercial installation the whole design should better be done by some one experienced , Mr varun may please note what ever is being advised is for academic purpose.

Best regards

Venugopal