Yes, IIT Delhi accepts Uceed Score.
UCEED is primarily administered for students seeking to pursue design in IIT.
Any design aspirant who seeks to pursue a bachelor's degree in design from any of the IITs has to sit for UCEED mandatorily.
Whereas, design aspirants seeking a Masters's degree in Design have to sit for CEED.
So, It is a given that IIT Delhi accepts UCEED score as well. 
