MedicineEng
Industrial
Hi guys:
I confess that I'm not at ease with thermodynamic calculations regarding steam production and I need some help checking my calculations
I am trying to calculate how much natural gas a boiler would consume to produce 10m3 of 8 bar steam from room temperature water and I am reaching values that seem odd to me but still couldn't nail where is my mistake.
Assumptions:
Water quantity: 10m3
Room Water temperature: 20C
Final Steam temperature: 170C
Water Sensible Heat: 1.2 kJ/Kg.C
Enthalpy liquid :720.9kJ/Kg
Enthalpy evaporation:2047 kJ/kg
Natural Gas Calorific value: 41,868.00 kJ/m3
Boiler efficiency: 85%
Total energy needed: 10,000*((150*1.2)+2047)=22,270,000.00kJ
Natural gas consumption:22,270,000.00/41,868*0.85=625.78 m3
I think that this is an absurd amount of natural gas and my gut feeling was expecting a much lower natural gas volume.
What am I doing wrong?
Thanks for the help
I confess that I'm not at ease with thermodynamic calculations regarding steam production and I need some help checking my calculations
I am trying to calculate how much natural gas a boiler would consume to produce 10m3 of 8 bar steam from room temperature water and I am reaching values that seem odd to me but still couldn't nail where is my mistake.
Assumptions:
Water quantity: 10m3
Room Water temperature: 20C
Final Steam temperature: 170C
Water Sensible Heat: 1.2 kJ/Kg.C
Enthalpy liquid :720.9kJ/Kg
Enthalpy evaporation:2047 kJ/kg
Natural Gas Calorific value: 41,868.00 kJ/m3
Boiler efficiency: 85%
Total energy needed: 10,000*((150*1.2)+2047)=22,270,000.00kJ
Natural gas consumption:22,270,000.00/41,868*0.85=625.78 m3
I think that this is an absurd amount of natural gas and my gut feeling was expecting a much lower natural gas volume.
What am I doing wrong?
Thanks for the help
