Bioenergy and Waste

Question 1

Higher Heating Value (HHV)

Answer 1

Heat released by burning fuel at 25 degrees celcius and returning the combustion products to 25 degrees

Question 2

Specific Heat Capacity

Answer 2

The energy required to raise one kilogram of the material by one degree celcius

Question 3

Lower Heating Value (LHV)

Answer 3

Heat released by burning fuel at 25 degrees and returning the combustion products to 150

Question 4

CO2e values for:
-CH4
-N2O
-CO2
-SF6
over 100 year period

Answer 4

CO2: 1
CH4: 28
N2O: 265
SF6: 23500

Question 5

Describe combustion bioenergy

Answer 5

residual waste burns at 850 degrees and the energy is recovered as electricity and heat

Question 6

Anaerobic Digestion bioenergy

Answer 6

uses microorganisms to convert organic waste into a methane-rich biogas that can be combusted to generate electricity and heat or converted to biomethane

Question 7

Gasification and Pyrolysis bioenergy

Answer 7

is where fuel is heated with little or no oxygen to produce “syngas” which can be used to generate energy or as feedstock for producing methane, chemicals, biofuels, hydrogen