If you have reservations about your ability to get a good spray that will do what you need it to do, let me give you another approach to the problem.
Some condensers are multi-pressure, and the condensate from the lower pressure shells has to be brought into the highest pressure shell and heated up to the hotwell saturation temperature to prevent oxygen saturation due to subcooling.
This is typically done with "rain" trays. These are wide trough type trays with the bottom of the tray being made of perforated plate. They are typically located in the lower areas of the condenser, below the bundle, where the "rain" drops directly into the hotwell. These do the job they are designed to do.
In the process, they absorb heat from the surrounding steam, and hence, contribute to the condensing effort of the high pressure shell.
Not knowing what the geometry looks like in your shell, I can only suggest that you look and see if there is enough open area available for you to build such a tray system. You will need to calculate the open area required for the water flow you have, and use lots of small holes in your perforated plate, rather than fewer larger ones.
If located directly below the bundle, remember that the condensate falling through the bundle has to flow through the 'rain tray' too. Be sure to consider this in your hole calculation.
Such a tray will help prevent subcooling in the normal condensate, too.
The higher you can build your tray above the hotwell, giving more distance for the 'rain' to fall through, the better it will heat the make up stream.
Net effect wise, the condenser does not care where you absorb some of the duty that it is required to do, spray, tray or the next one.
One other simple thing that you can do, is put a distribution header, a pipe with an adequate number of holes drilled in it along its length for the fluid to pass without too much pressure drop along the top of the tube bundle, and allow the make up water to dribble down through the bundle, where it will pick up heat from the steam penetrating the bundle.
If you have a two pass condenser, meaning that the cold water flows in one end at the bottom, turns around, and flows back (normally at the upper level of the tube bundle, but not always, I have seen them both ways,) your colder water may just absorb heat from the hotter tubes, and contribute nothing to the duty. However, if you do most of the distribution at the coldest end of whatever pass you are woking with, single or double, this should be negligable.
The cooler water, as it flows across the tube banks will attract steam, which is attracted to the coldest surface it can find, and will contribute to the duty of the condenser.
So there you have it. Spray, which is what you initially inquired about, tray, which is commonly done for other reasons, or just spreading the make up over the bundle, which is also quite commonly done (principally to help with the deaeration of the make up.)
rmw
), Do you know what is the phenomena behind the steam flow in the turbine and when entering the condenser? As I know, in the turbine section, there's a drop pressure and velocity of steam, but in the exhaust hood, I still don't know the phenomena in it.
