It may not be a good idea to look at superheater in isolation while designing HRSG. One has to consider the heat balance of the entire two pressure system, fixing the pinch and approach points and including for any blowdown or steam extraction.
S.C.Sekhar
WRL69,
One way of getting over the temperature gradient limitation would be to simply split the intermediate tube sheet at the point where the temperature gradient is about 400F or less. The detailing could get a bit tricky but by leaving the top row of tube holes open ended, we could achieve...
I am interested in designing a regenerative airheater (or rotary airheater). I need to make a preliminary sizing before getting the suppliers' offer. Can anyone help me please.
S.C.Sekhar
Thanks for the information on the pneumatic conveying system. Air enters the ejector a pressure and draws in the solids at the vena-contracta to convey it over the required length with a velocity of around 15-20 m/s.
regards,
S.C.sekhar
Hi!
I am looking for the priciples of ejector design for transporting solids (coal/grits) through a pipe from a hopper to a furnace. Could someone please guide to any calculations on ejectors?
Thanks,
S.C.Sekhar
I have an application where a vertical tube (2 in OD) is subjected to combined presure and axial loading. At one point, the tube has an opening for a branch (also of 2 in. OD) to form a tee. This tee is of a welded construction and formed from tubes. How do I analyse the effect of the opening?
Hi!
I need to know about design of an ash cooler for Fluidised bed boiler applications. The ash drained from the bed at 900ºC should be cooled to 200-250ºC in an ash cooler using air. The ash quantity may vary between 2-3 t/h. Could someone help me in this?
S.C.Sekhar
