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 negativeInvalid input field Format – Not a numberFormat - Empty input field| | energyGenerationUnit | String | Mandatory | | kWh/year | Invalid unit Format – Invalid fieldEmpty unit Format – Empty field | | buildingType | String | Mandatory | | HouseholdHealth CenterDispensarySchoolPrimary SchoolSecondary SchoolPublic AdministrationTrading PlaceBus Stop| Invalid input field Format – Invalid fieldEmpty 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()