Pressure Drop .. Good or Bad??

Generally yes, if you are talking about a steam condenser. (To a point, anyway.)

Yes Iam talking abt steam surface condenser that condenses the exhaust steam from LP turbine. But When it comes to design of condenser then is it not the case ..to reduce the pressure drop as much as possible while the steam flows through Tube Bundles..???
beacuse pressure drop on the shell side takes place due to mainly three reasons 1. Friction 2. Momentum & 3. Gravitation and we try to reduce this pressure drop..!! I am getting really confused on this contradiction. plz help.

I was thinking of the steam side rather than the water side.

(I am not especially familiar with steam condensers, but it seems odd that steam would be in the tubes with water in the shell.)

Sir I am sorry I used the word 'through' instead of 'over' while describing flow of steam. I exactly meant the same as u understood i.e steam is flowing over the Tube bundles and cooling water is flowing inside .

If it is so Then do you say that while steam flows in shell side then pressure drop is a favorable phenomenon ??

The pressure difference between the turbine and the condenser should be high (deeper vacuum in condenser). Inside the condenser, the pressure drop of the steam should be relatively small, but there is some compromise involved: Pressure drop too low = steam velocity too low = less turbulence = less heat exchange. Pressure drop too high = condenser inlet pressure too high = less pressure difference in the steam cycle = less efficiency.

I don't do enough steam to know the ideal value, so this is only an intuitive description. If possible, check the manual or other literature for the condenser.

Although I am looking for some more technically satisfactory answers.. Thanks any ways to "Mr. Tornado".