COMPARISON OF V R F SYSTEMS OVER CONVENTIONAL CHILLERS Sl.no PARAMETERS EQUIPMENT V R F CHILLERS 1 FLOOR AREA REQUIRED Less More 2 OUT DOOR LOCATION Terrace /balcony Terrace /basement/separate rooms 3 NOISE LEVEL Low Very high 4 DESIGN FACTOR/ Advantages A) DIVERSITY Diversity min: 5 % to Max:130% in outdoor Min: 20 % & Max:100% B) STAND BY UNIT No stand by unit required(having combination of inverter/constant speed compressors) Stand by essential- Min.50% C)INVERTOR Technology Good in partial application Not useful in partial application D) Starting current-torque In sequence –very low Very high E) Service / complaint closure time Very fast Takes more time 5 INDOOR 5.1 IDU OPTIONS Available in wide range Not available 5.2 DESIGN FACTOR Each rooms,cabs,work station can be separately designed Design per floor 6 TEMPERATURE ACCURACY (+)(-) 0.5deg c set temp (+)(-) 3deg c set temp 7 ACCESSORIES REQUIRED 7.1 Pumps Not Applicable Applicable 7.2 Strainers Not Applicable Applicable 7.3 Softeners Not applicable Applicable 7.4 Cooling towers Not applicable Applicable 7.5 Generator For 100% For 120%

Comparison of Vrf Over Chillers[1]

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Page 1: Comparison of Vrf Over Chillers[1]

COMPARISON OF V R F SYSTEMS OVER CONVENTIONAL CHILLERS

Sl.no PARAMETERS EQUIPMENTV R F CHILLERS

1 FLOOR AREA REQUIRED Less More 2 OUT DOOR LOCATION Terrace /balcony Terrace /basement/separate rooms3 NOISE LEVEL Low Very high4 DESIGN FACTOR/ Advantages

A) DIVERSITYDiversity min: 5 % to Max:130% in outdoor Min: 20 % & Max:100%

B) STAND BY UNITNo stand by unit required(having combination of inverter/constant speed compressors)

Stand by essential-Min.50%

C)INVERTOR Technology Good in partial application Not useful in partial applicationD) Starting current-torque In sequence –very low Very highE) Service / complaint closure time Very fast Takes more time

5 INDOOR 5.1 IDU OPTIONS Available in wide range Not available5.2 DESIGN FACTOR Each rooms,cabs,work station can be separately

designedDesign per floor

6 TEMPERATURE ACCURACY (+)(-) 0.5deg c set temp (+)(-) 3deg c set temp

7 ACCESSORIES REQUIRED7.1 Pumps Not Applicable Applicable7.2 Strainers Not Applicable Applicable7.3 Softeners Not applicable Applicable7.4 Cooling towers Not applicable Applicable7.5 Generator For 100% For 120%8 CONSUMABLES

8.1 Water Not applicable Applicable8.2 Resins Not applicable Applicable8.3 Water treatment chem. Not applicable Applicable9 PIPING

9.1 Design Flexibility Yes No 9.2 Cost Low High 10 MAINTAINANCE

Page 2: Comparison of Vrf Over Chillers[1]

10.1 Maintenance parts. Only Pre filters Pre-filters, pumps, strainers, Motors, All parts including piping.

10.2 Frequency Bi-monthly for filters Bi-monthly for pre- filters, qtrly for all parts.

10.3 Self diagnostic function Available-Easy to detect fault N.A

11 AUTO RESTART Available Needs Operator.

12 OPERATION 12.1 Operators Not required Essential 12.2 Operation End user can operate Only trained tech can operate12.3 Cost Less More13 LOAD (DIVERSITY FACTOR) 5% -130% variable 15% -100% by stage14 RUNNING COST (power)

14.1 For 123 TR 135.3 Kw/hr 221.4 Kw/hr14.2 Savings 86.1kw/hr. -NA-15.0 FOR 123TR15.1 Maintenance cost.(consumables) Nil 1,50,00015.2 Power consumption 135.3kw/hr 221.4kw/hr15.3 Power consumption/annum 2,43,540kw @6hrs/day x 300 days 3,98,520@6hrs /day x 300 days 15.4 Power cost @7.5/unit Rs. 18,26,550 Rs. 29,88,900

16 TOTAL RUNNING COST Rs 1,52,212.5 Rs. 2,49,075.00

17 SAVINGS PER ANNUM IN DAIKIN DUCTABLE

Rs. 96,862.5