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 37 of 45

Established by E. Morin

To the attention of Ms. Beatriz Herrero-Gonzalo

10 Appendix N°1: Determination of the January 2011 boiler house

efficiency

BOILER SIMULATION

CLAYTON

Boiler operating hours (incl. hot stand-by hours)

6.240 hours/year

1. Fuel power input

% LHV

8

Fuel type:

61,1 Nm3/h

Fuel consumption during operating hours

Specific weight of the fuel

0,77 kg/Nm3

Fuel consumption

47,2 kg/h

Lower heating value (LHV)

49318 kJ/kg (=38082 kJ/Nm3)

Higher heating value (HHV)

54608 kJ/kg (=42167 kJ/Nm3)

Fuel unit costs

25 €/MWh HHV (= 0,29 €/Nm3)

Fuel power input (LHV)

646,6 kW

100%

Fuel power input (HHV)

716,0 kW

7 Bar(g) / 170,4°C sat.

Steam pressure

Enthalpy steam

2768 kJ/kg

93 °C

Temperature feed water to the boiler/eco

Enthalpy feed water

389 kJ/kg

Latent heat of the steam

2380 kJ/kg

Max. theoretical steam production

0,98 ton/h

2a. Combustion losses (boiler only) Temperature stack after boiler

160 °C

18 °C

Temperature ambient air

45,0 %

Excess air

7,00 %

Oxygen % flue gas (Dry volume)

Stack flow

15,82 Nm3/Nm3 fuel

Total stack flow

966,8 Nm3/h

Specific heat stack

1,37 kJ/Nm³.K

Power in stack (sensible heat)

52,14 kW

-8,1%

2c. Economizer (non condensing) Temperature stack after economizer

120 °C

Economizer inlet water temperature

93,0 °C

102,6 °C

Economizer outlet water temperature

100%

Heat transfer efficiency

Power recovered by economizer

14,7 kW

2,3%

2d. Air preheating from external source (Top of boiler house) Combustion air required

14,85 Nm3/Nm3 fuel

Total combustion air flow

907,8 Nm3/h

Normal combustion air temperature

18,0 °C

18,0 °C

Preheated combustion air temperature

Power recovered by air preheating

0,0 kW

0,0%