Two design of ACC in available in market:- Multi row system with circular tubes
- Single row design with elliptical tubes
- Advantages of single row over multi row ACC
- Lower fan power consumption 5%-6%.
- The tube shape and fin characteristics result in reduced pressure drop on the air
side, leading to less power consumption by the fan motors. - Increased thermal efficiency. Increased heat ex-changer efficiency means fewer
modules are needed for a given duty. Maintenance cost will be lower. - Single row tubes do not burst when frozen, round tubes burst, causing damage
- Easy to identify a leaking tube with single-row ACC’s
Conclusion:
Single Row ACC is better than Multi row ACC in respect of auxiliary power
consumption and performance.