What percentage reduction in carbon emissions do the following natural gas-fired CHP systems provide compared to...

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Chemistry

What percentage reduction in carbon emissions do thefollowing natural gas-fired CHP systems provide compared to thespecified separately generated electricity and heat systems? Forcarbon emissions, assume natural gas emits 53 g CO2/MJ, and foraverage grid emissions assume 0.6 kg CO 2 /kWh. The jouleequivalent of 1 kWh of electricity is 3.6 MJ.
a. CHP with 36% electrical efficiency and 40% thermal efficiencyversus an 85%-efficient gas boiler for heat and the above averagegrid for electricity.
b. CHP with 50% electrical efficiency and 20% thermal efficiencyversus a 33%-efficient, 1.0 kg CO 2 /kWh, coal-fired power plantfor electricity and an 80%-efficient gas-fired boiler for heat.

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4.0 Ratings (785 Votes)

CHP stands for combined heat and power a CHP 1kWh of electricity it will emit 53 g CO2MJ36 x 36 530 g of CO2 At this time it will also produce heat which will be 530g53gx04 4 MJ 1kWh of See Answer

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