Clayton Armstrong 2011-02-22 GSK Aranda SP - steam&condensat

STEAM AND CONDENSATE AUDIT

Project N°30275

Date: 04/02/2011

GSK MANUFACTURING Aranda, Spain

Page 10 of 45

Established by E. Morin

To the attention of Ms. Beatriz Herrero-Gonzalo

According to your water analysis, TDS concentration is half of the lowest value recommended by

Clayton. Therefore you could reduce at least by 2 the blowdown rate.

The easiest solution is to change the duration of blowdown valves opening defined in the BMS

system. In agreement with Nalco, you can reduce the blowdown duration to 2 minutes every 2 hours

for example.

Another solution consists in installing a TDS probe on the feedwater line and control the blowdown

valve continuously.

3.3 Savings calculation

Reduce Blowdown rate

Existing

Proposed

Savings

Make-up water TDS

ppm

50,0

50,0

Feedwater TDS

ppm

1520,0

3000,0

Blowdown rate

%

3,40

1,69

1,71

Water savings

Existing

Proposed

Savings

Steam production of the boiler

kg/h

1000,0

1000,0

Blowdown flow

kg/h

34,0

16,9

17,1