Answer Posted / girijapati mishra

TOTAL REF LOAD =1.5X20 =30 TR
1 TR = 3.5 KW
Thus , 30 TR = 105 KW
COP (i.e ratio of heat removed vs power input ) for AC
varies from 2.5 to 3 depending on design and other
considerations.

Assuming a COP 2.5 ( lower side)
Power required will be 42 kw (=105/2.5).
Considering power factor 0.8 ( gen assumption for all
caculations) rating of the DG set will be 52.5kva ( =42/0.8)
. A DG set higher than this calculated value to to selected
for this requirement.

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