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 19 of 45

Established by E. Morin

To the attention of Ms. Beatriz Herrero-Gonzalo

3. Solution 3 : preheat combustion air using hot condensate

The preheating of combustion air from ambient to 50°C will lead to an efficiency improvement by

1.5%:

Boiler efficiency

Existing

Proposed

Savings

Intake air temperature (average)

°C

18,0

50,0

Stacks temperature

°C

120,0

120,0

Oxygene content

%

7,0

7,0

Boiler efficiency

%

86,0

87,5

1,5

Fuel savings

Existing

Proposed

Savings

yearly Energy used

GJ/yr

12499,2

12499

Boiler efficiency

%

86,0

87,5

1,5

Fuel used

MWh/yr hhv

4486

4409

76,90

Fuel unit costs

€/MWh hhv

25,0

25,0

Fuel costs

€/year

112145

110222

1922

CO2 savings

Existing

Proposed

Savings

Energy used

Gj/yr

16149

15872

277

CO2 emissions

kg CO2/GJ

50,6

51

CO2 produced

t/yr

817

803

14

4.4 Investment

1. Solution 1 : reduce excess feed water rate on the pump

Budgetary cost for this project is estimated under 1000 €.

Payback time for this optimization is less than 6 Months.

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

Budgetary cost for this project is 3000 €.

Payback time for this optimization is about 55 Months.