Linear power supply design circuit [help]

Hello everyone,

I am building a power supply with 24v 5A transformer to compensate the voltages dropped by diodes and other components. I have posted a design earlier however it had too many conflicts. I redesigned it again without current limiting, but I'd like to add an adjustable current regulator. I am not sure of where to put it! The design is made to decrease the ripples [ ]. Please do criticize, and tell me what can I make to make it better or fix it.

I know that the lm338 dissipates alot of heat so i will use a radio heatsink laying around with a fan [https://farm6.staticflickr.com/5641/22741611580_ed371c13ca_b.jpg]

A couple of questions:

How can i determine the best values for caps?
How can i improve the circuit?
Where can i find Vripple in datasheets?
Is there any other way of adding a precise adjustable current limit?

Sincerely,

teklucifer

{Please note: that this a repost of my thread from AAC}

EDIT:
"P.S: I may not be able to reply fast due to time-zone difference - I apologize in advance for my inactivity"

 

Will the power supply limit the current or my design is incorrect I am also thinking to move the current limiting after voltage regulation. One more thing is, someone told me that RV2 is wrong position for voltage regulation.

 

Another question,

Since the lm33 dissipates alot of heat, can i use this heatsink to cool the regulator? (with forced air cooling)