Comments for Energy Technology Expert http://energytechnologyexpert.com Fri, 03 Feb 2012 17:16:54 +0000 hourly 1 http://wordpress.org/?v=3.2.1 Comment on How to Calculate Power Plant Emissions – a simplified procedure in a spreadsheet by admin http://energytechnologyexpert.com/environmental-impacts/how-to-calculate-power-plant-emissions-a-simplified-procedure-in-a-spreadsheet/comment-page-2/#comment-6391 admin Fri, 03 Feb 2012 17:16:54 +0000 http://energytechnologyexpert.com/environmental-impacts-risks/how-to-calculate-power-plant-emissions-a-simplified-procedure-in-a-spreadsheet/#comment-6391 Hi Stevens, To convert from mg Hg per MWh to mg Hg / Nm3, you need the following information: 1) mg Hg / MWh = xxx (given) 2) Thermal efficiency or plant heat rate = kJ as GHV / MWh 3) Fuel gross heating value = GHV = kJ / kg of fuel 4) Excess air ratio = % excess relative to stoichiometric requirements 5) Fuel analysis = %C, % H, % S, % O, % N, % H2O (moisture), % ash From the above, you will be able to relate the MWh to kJ fuel to kg fuel to kg air stoichiometric to kg air actual supplied. Then from the standard density or molal volume of air, you compute kg air to NM3 of air so finally, you are able to compute mg Hg / Nm3: (xxx mg Hg / MWh) x (MWh / 1,000 kWh) / (heat rate, kJ / kWh) / (GHV, kJ / kg fuel) / (air-fuel ratio, kg air / kg fuel) / (density, kg air / NM3) = yyy mg Hg / NM3 Hi Stevens,

To convert from mg Hg per MWh to mg Hg / Nm3, you need the following information:

1) mg Hg / MWh = xxx (given)

2) Thermal efficiency or plant heat rate = kJ as GHV / MWh

3) Fuel gross heating value = GHV = kJ / kg of fuel

4) Excess air ratio = % excess relative to stoichiometric requirements

5) Fuel analysis = %C, % H, % S, % O, % N, % H2O (moisture), % ash

From the above, you will be able to relate the MWh to kJ fuel to kg fuel to kg air stoichiometric to kg air actual supplied.

Then from the standard density or molal volume of air, you compute kg air to NM3 of air

so finally, you are able to compute mg Hg / Nm3:

(xxx mg Hg / MWh) x (MWh / 1,000 kWh) / (heat rate, kJ / kWh) / (GHV, kJ / kg fuel) / (air-fuel ratio, kg air / kg fuel) / (density, kg air / NM3) = yyy mg Hg / NM3

]]> Comment on How to Calculate Power Plant Emissions – a simplified procedure in a spreadsheet by stevenpsg http://energytechnologyexpert.com/environmental-impacts/how-to-calculate-power-plant-emissions-a-simplified-procedure-in-a-spreadsheet/comment-page-2/#comment-6389 stevenpsg Fri, 03 Feb 2012 06:06:19 +0000 http://energytechnologyexpert.com/environmental-impacts-risks/how-to-calculate-power-plant-emissions-a-simplified-procedure-in-a-spreadsheet/#comment-6389 How do I convert mg/MWh to mg/Nm3 for mercury emission from coal power plant?. Thanks. How do I convert mg/MWh to mg/Nm3 for mercury emission from coal power plant?. Thanks.

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