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Carbon Registry - Credit Calculation

Introduction

The library includes the implementations carbon credits calculation for different sectors. Currently implemented only two of the sectors which are Agriculture and Energy.

Sectors

According to the UNFCCC - CDM (Clean Development Mechanism) methodologies, identified sectors are as follows,

  1. Energy industries (renewable / non-renewable sources)
  2. Energy distribution
  3. Energy demand
  4. Manufacturing industries
  5. Chemical industries
  6. Construction
  7. Transport
  8. Mining/mineral production
  9. Metal production
  10. Fugitive emissions from fuels (solid, oil and gas)
  11. Fugitive emissions from production and consumption of halocarbons and sulphur hexafluoride
  12. Solvent use
  13. Waste handling and disposal
  14. Afforestation and reforestation
  15. Agriculture

Calculation - Sector Agriculture

Sub Sector: Rice

Approved Methodology: Rice crops

Number of Credits = #hectares * #days * #tCO2e/ha/day
Input Field Data Type Mandatory/Optional Default Value Possible values if any Validations
landArea Float Mandatory Area>0Format – Non-zero, Can't be negative
Invalid area Format – Not a number
Empty area Format - Empty field
landAreaUnit String Mandatory ha Invalid unit Format – Invalid field
Empty unit Format – Empty field
duration Integer Mandatory Days > 0 Format – Non-zero, Can't be negative
Invalid input field Format – Not a number
Format – Empty field
durationUnit String Mandatory Days Invalid unit Format – Invalid field
Empty unit Format – Empty field

System Configurations

Constants

Constant Name Value Unit Unit of Measurement
emissionFactor 0.046 emissionFactorUnit tCO2e/ha/day

Constant values can parse externally. If not use above default constants.

Example Calculation:

Hectares - 16ha 
Days – 120 
Constant – 0.046 

 #hectares * #days * #tCO2e/ha/day = 16*120*0.046 = 88.32

Calculation - Sector Energy

Sub Sector: Solar

Approved Methodology: Solar Photovoltaic (PV)

Parameters: 
 
X – Enegy generation value (kWh/year/unit) 
Y – Threshold value (kWh/year/unit) 
A – High emission factor (tCO2/ MWh) 
B – Low emission factor (tCO2/ MWh) 

If X < Y ; X*A 
If X >= Y ; Y*A + (X-Y)*B
Input Field Data Type Mandatory/ Optional Default Value Possible values if any Validations
energyGeneration Float Mandatory Energy > 0 Format – Non-zero, Can't be negative
Invalid input field Format – Not a number
Format - Empty input field
energyGenerationUnit String Mandatory kWh/year Invalid unit Format – Invalid field
Empty unit Format – Empty field
buildingType String Mandatory Household
Health Center
Dispensary
School
Primary School
Secondary School
Public Administration
Trading Place
Bus Stop		 Invalid input field Format – Invalid field
Empty input fieldFormat – Empty field

System Configurations

Constants

Constant Name Value Unit of Measurement
High Emission Factor (A) 6.8(at or below threshold) High emission factor (tCO2/ MWh)
Low Emission Factor (B) 1.3(above throshold) Low emission factor (tCO2/ MWh)
Building Type Household, Health Center, Dispensary, School, Primary School, Secondary School, Public Administration, Trading Place, Bus Stop

Threshold

Building Type Threshold Value Unit of Measurement
Household 55 kWh/y
Health Center 825 kWh/y
Dispensary 825 kWh/y
School 275 kWh/y
Primary School 275 kWh/y
Secondary School 275 kWh/y
Public Administration 55 kWh/y
Trading Place 825 kWh/y
Bus Stop 200 kWh/y

Example Calculation:

  1. A - High emission factor (tCO2/ MWh) = 6.8
  2. B - Low emission factor (tCO2/ MWh) = 1.3
  3. Bulding Type – Household
    • Y Threshold value (kWh/year/unit) = 55

  4. X - Measured value (kWh/year/unit) = 20 
    X < Y ; X*A = (20/1000)*6.8 = 0.136
  5. X - Measured value (kWh/year/unit) = 105 
    X >= Y ; Y*A + (X-Y)*B = (55/1000)*6.8 + {(105-55)/1000}*1.3 = 0.439

Usage

Generate Credit based on the Sector

import { AgricultureConstants, AgricultureCreationRequest, calculateCredit, SolarConstants, SolarCreationRequest } from '@undp/carbon-credit-calculator';

// Create creditCreationRequest based on the sector
// AgricultureCreationRequest if it is Agriculture sector
// SolarCreationRequest if it is a Solar sub sector.
let creditCreationRequest: CreditCreationRequest = <Sub sector specific create req>;
const credit = await calculateCredit()