RhoV2
RhoV2
(OP)
Hi,
Can anyone explain me what is the use or the importance of the term RhoV2 in the desing of a flare header collector?
Thanks in advance,
Can anyone explain me what is the use or the importance of the term RhoV2 in the desing of a flare header collector?
Thanks in advance,





RE: RhoV2
RE: RhoV2
RE: RhoV2
beyond that you need to get a specialist's response
RE: RhoV2
I'll have to see if I can recreate it where I am and post the details. I remember the company was NOT impressed by this.
RE: RhoV2
ρV 2 is the velocity term from the Bernoulli equation. This parameter is often used as guiding criteria for design in fluid flow. The higher the number then you can expect higher pressure loss, something else you would want to avoid in a flare header. The TEMA standards use this parameter as a guide to select nozzle sizes for heat exchangers and when to use impingement protection. I've also seen the parameter used in conjunction for flow through a pipeline to avoid erosion concerns and in tower design for nozzle selection for vapor inlet lines.
RE: RhoV2
Let's take rhov2 = K (K being the value for a flare system)
Rearranging it, we get v2 = K/rho
or
v = K^0.5/rho^0.5
API 14E for the erosional velocity is
v = C/rho^0.5
Therefore, the rhov2 constraint is simply the same as the API 14E erosional velocity limit but with a different value of C than the 100 or so commonly used.
RE: RhoV2
Talk to piping designers or the designers of your 'collector' for the maximum acceptable nozzle loadings (both inlet and outlet). The company for whom you are designing the system may also have design guidelines/requirements in this area. Check in design documentation (both from client and vendor) to see what has been used as maximum or acceptable loading.