@undp/carbon-credit-calculator

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

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()