Economic and Environmental Geology

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Table. 4.

Table. 4.

Calculation of life cycle of GHGs emission and applicable DB for Mine reclamation projects

Life cycle stage Calculation items Equation Applicable data
Construction Material input (ton, m3, etc) Work amount (unit) × Material inputs (ton, m3 /unit) Estimation system of Design/ Calculation basis
Energy usage due to equipment usage(L) Work amount (unit) / amount per hour (unit/hr) × fuel efficiency(L/hr) or Work amount (unit) × Equipment usage time(hr/unit) × fuel efficiency (L/hr) Select according to the calculation method in the estimation of design Only for diesel or gasoline
CO2 emissions due to material input(tCO2-eq) Σ[Material input (kg, m3 etc) × Emission coefficient(tGHG(CO2/CH4/N2O)/kg, m3 etc) × GWP] National LCI DB,
UNEP-GLAD DBa), Ecoinvent DB etc can be applied
CO2 emissions from equipment use (tCO2-eq) Σ[Energy usage(kWh, m3 etc) × Permutations(MJ/kWh, m3 etc) × Emission coefficient (tGHGs (CO2/CH4/ N2O)/TJ) × 10-9 × GWP] National calorific value b) and IPCC 2006
calorific amount c)
Can be applied.
The basic emission coefficients by fuel and greenhouse gas in the mobile combustion (road) sector may be applied.
Operation and maintenance CO2 emissions from energy use(tCO2-eq) Same as CO2 emissions due to construction-stage equipment use The emission coefficient for power uses the nationally unique power emission coefficient.
End of life Same as CO2 emissions due to construction-stage equipment use

a) UNEP-GLAD: Global LCA Data Access

b) Energy Law Enforcement Rules

c) GWP: IPCC 2006 Guideline

Econ. Environ. Geol. 2021;54:733-41
© 2021 Econ. Environ. Geol.