Centrifugals with VSD VS Centrifugal with star delta starter

[vijay_study]

Hi,

I am working on a pharmaceutical projects involving centrifugal chillers having following data:

1. Chiller capacity - 550TR x 2 Nos.
2. Chilled water inlet / out - 5°C / 11°C
3. York Model: YKCECFQ75CMF
4. Refrigerant: R-134a

Wanted to use variable pumping across chiller evaporator.

Any guidance as to which one is the preferred option Centrifugal with VSD or Centrifugal with star delta starter with reference to variable pumping.

Thanks

Vijay Kumar

[Lowrider]

Guess what would happen if you do it star-delta?

[avdheshastri]

i feel cf with VSD is better option.