E Venkata Raju - Building Manager 1

Condensation

water that collects on a cool surface because the temperature of the surface is below the point at which moisture in the air forms as water droplets.

E Venkata Raju - Building Manager 2

Formation of condensation

E Venkata Raju - Building Manager 3

Condensate on glass of water

E Venkata Raju - Building Manager 4

Condensate water from AHU

E Venkata Raju - Building Manager 5

Quantity of condensate depends on

1. Temp of chilled water @ inlet to AHU2. Percentage of RH in fresh air3. Percentage of RH in return air4. Capacity of AHUs5. Volume of chilled flow6. Volume of air flow

In Hyderabad , More RH during monsoons (70 to 85%), in summer 50 to 70% and in winter 25 to 50%.

E Venkata Raju - Building Manager 6

Approximate Condensate quantity @B7

• Based on our intermittent collection sample reports at individual AHUs , floor AHUs , south wing AHUs and north wing AHUs in the last 3 to 4 months , it is approximately 10 to 12 KL per day ( when 37 AHUs running).

• Assumed 15 to 18KL per day (When 62 AHUs running)

E Venkata Raju - Building Manager 7

Quality of condensate water @B7

1.Hardness 0 to 2 ppm2. TTDs 30 to 40 ppm3. PH 6 to 74. Clear water

5. Temp 15 to 20 deg.C

E Venkata Raju - Building Manager 8

Usage of collected condensate water

1.As drinking water

2.As domestic water

3.As CT water

E Venkata Raju - Building Manager 9

For Drinking- Scheme

• Approximate cost : RS 2.50 lacs• Savings/Earnings : 6000 (Ltrs) x 20 (days) x Rs.1.00 (per ltr)x

12(months) = 14.40 lacs /year• Note :Every high purity of raw water , output is 80 to90% .

Condensate water

Nano filtration/ RO

UV dis infection Chlorination

Lab testing as per drinking water standards Drinking tank

E Venkata Raju - Building Manager 10

For domestic purpose- Scheme

• Approximate cost : Rs 20000/-• Savings/earnings: 12,000 (ltrs)x Rs0.30 x 26

days x 12 months= 11,23,200/- year

Condensate water

Multi grade filter

Manual/auto Chlorination

Domestic tank

E Venkata Raju - Building Manager 11

For CT water- Scheme

• Approximate cost : Rs 15000/-• Savings : No chemicals required , no scale formation , no

bleed off , less power consumption in chillers : Approximately Rs 75 to 80 lacs per year.

Condensate water Sand filter Collection

tank

E Venkata Raju - Building Manager 12

B7Existing AHUs drain scheme

E Venkata Raju - Building Manager 13

B7 Proposed plan to collect condensate water from all AHUs

E Venkata Raju - Building Manager 14

Cost estimation

• 1. As per quote by Hiline : Rs 1.5 lacs• 2. As per our estimate and as per standard

design : Rs 75,000/-• 3. As per present available material : Rs

25000/- (May not be as per standard , but it is good and suitable for our requirement)

E Venkata Raju - Building Manager 15

Thanks