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 18 of 45

Established by E. Morin

To the attention of Ms. Beatriz Herrero-Gonzalo

Water savings

Existing

Proposed

Savings

Flash steam flow estimated

kg/h

0,059

0,045

0,015

Yearly water lost

m³/year

371

278

Water unit costs

€/m3

5,0

5,0

Water costs

€/yr

1853

1390

463

The total savings would be 2340 €/year .

2. Solution 2 : Move the condensate connections to the bottom of the tank with a sparger tube

The modification will imply an increase of the feedwater temperature pumped to the generators.

We estimate this increase at 5°C. The efficiency gain on steam production will be about 0.5%.

Boiler efficiency

Existing

Proposed

Savings

Feedwater temperature °C

93,0

98,0

Boiler efficiency

%

86,0

86,5

0,5

Fuel savings

Existing

Proposed

Savings

yearly Energy used

GJ/yr

12499,2

12499

Boiler efficiency

%

86,0

86,5

0,5

Fuel used

MWh/yr hhv

4486

4460

25,93

Fuel unit costs

€/MWh hhv

25,0

25,0

Fuel costs

€/year

112145

111496

648

CO2 savings

Existing

Proposed

Savings

Energy used

Gj/yr

16149

16055

93

CO2 emissions

kg CO2/GJ

50,6

51

CO2 produced

t/yr

817

812

5

Savings are poor (less than 1000 €) because steam production is very low. If the steam demand

increases, savings will follow.