MedicineEng
Industrial
- Jun 30, 2003
- 609
Hi All:
I'm making some ball park figure calculations to estimate how much a laundry steam press would represent in terms of natural gas consumption at the steam boiler but I'm getting some numbers that don't seem right, but I can't find where my potential mistake might be.
Data:
Steam press consumption: 3kg/h
he:2,107 kJ/kg-5 bar saturated steam Specific enthalpy evaporation
Estimated steam boiler and distribution efficiency: 0.85
Natural Gas Density: 0.80kg/m3
Natural Gas Calorific Power (kW/kg):14.5
Heat Transfer rate of a steam condensing system:
q(KW)=he*steam flow rate (Kg/s)
24/7 operation
Calculations:
q=1.76 kW equivalent to q(year)=15,382kW/year
Total NG (kg) needed to produce steam: 15,382/14.5/0.85=1,248 kg of natural gas-equivalent to 1,560m3 NG per year
It has been quite a while since I did this type of exercise so I'm afraid I'm missing something.
Is my approach correct?
Thanks a lot for your help on this.
I'm making some ball park figure calculations to estimate how much a laundry steam press would represent in terms of natural gas consumption at the steam boiler but I'm getting some numbers that don't seem right, but I can't find where my potential mistake might be.
Data:
Steam press consumption: 3kg/h
he:2,107 kJ/kg-5 bar saturated steam Specific enthalpy evaporation
Estimated steam boiler and distribution efficiency: 0.85
Natural Gas Density: 0.80kg/m3
Natural Gas Calorific Power (kW/kg):14.5
Heat Transfer rate of a steam condensing system:
q(KW)=he*steam flow rate (Kg/s)
24/7 operation
Calculations:
q=1.76 kW equivalent to q(year)=15,382kW/year
Total NG (kg) needed to produce steam: 15,382/14.5/0.85=1,248 kg of natural gas-equivalent to 1,560m3 NG per year
It has been quite a while since I did this type of exercise so I'm afraid I'm missing something.
Is my approach correct?
Thanks a lot for your help on this.