Managing refrigeration and air conditioning activities

There are two calculation options available to use:

Refrigerant Use method: Users can enter the quantity of refrigerant in kilograms they have used. For further information, go to Adding refrigerant or air conditioning data using the Refrigerant Use method.

The screening method: User required to input Type of Equipment , Refrigeration Unit Make/Model, Number of Units, Equipment Charge Capacity (kg), Number of Service Years used during this Reporting Period (0.5 = six months), Annual Leakage Rate (%) , and Refrigerant Type. This method relies on the use of emission factors which are equipment specific therefore requires more information. For further information, go to Adding refrigerant or air conditioning data using Screening method.

You can find information about refrigerant type and kg of charge in:

(a) Air conditioning chillers and modular units: visual readings on the equipment, equipment manuals, or maintenance records.

(b) Refrigeration units: visual readings on the equipment.

Charge capacities for refrigerant or air conditioning equipment

Charge capacity is the mass of refrigerant used in a refrigerator or other cooling equipment.

Typical charge capacities for equipment

Type of equipment	Typical range in charge capacity (kg)
Domestic Refrigeration	0.05 - 0.5
Small Hermetic Stand-Alone Refrigeration Units	0.2 - 6.0
Condensing Units	50 - 2,000
Centralised Supermarket Refrigeration Systems	50 - 2,000
Industrial Systems	10 - 10,000
Small Stationary Air Conditioning	0.5 - 100
Medium Stationary Air Conditioning	0.5 - 100
Large Stationary Air Conditioning (Chillers)	10 - 2,000
Heat Pumps	0.5 - 100
Land Transport Refrigeration	3 - 8
Marine Transport Refrigeration	3 - 8
Light-Duty Mobile Air Conditioning	0.5 - 1.5
Other Mobile Air Conditioning	0.5 - 1.5

Adding refrigeration or air conditioning activities

Select Data Management and select GHG Activities.
Use the Organisation and Geographic tabs or the column filter fields to search for an activity.
Select Add New Activity, and in the Create New Activities tab, select the Fugitive Emissions activity source category for refrigeration and air-conditioning. For further information about the scopes and activity source categories, go to Scopes, activities, and emission factors covered by Diligent ESG.
In the Create New Activities tab, select Refrigeration.
Select the checkboxes beside the buildings that you want to add this activity to and select Confirm building selection and go to the next step.
In the General Settings tab, in the Activity Name field, enter a name for the refrigerant.
In the End Use field, select an end use, such as Facility Cooling & Refrigeration, Facility Air conditioning, or Facility HVAC.
(Optional) In the Account Code / Reference ID field, enter a reference ID for the activity.
Select Save to finish adding the activity.

Note

Other tabs, such as Mapping IDs or Data completeness test, are optional at this time. You can also configure these settings in bulk across activities at later stage. For further information, go to

Adding refrigerant or air conditioning data using the Refrigerant Use method

Using the Refrigerant Use method, you can enter the quantity of refrigerant in kilograms used.

Note

Air-conditioning and Refrigeration data cannot be uploaded to the Diligent ESG system, the data must be entered manually. This type of data is added once or twice a year.

Select Data Management and select GHG Activities.
Use the Organisation and Geographic tabs or the column filter fields to search for an activity.
Select Select beside the refrigeration or air conditioning activity that you want to add data to using the Screening method.

Important

The user only sees activities for facilities or assets and buildings that they have been granted access to by an Administrator.

Select Add New Data and in the Add Record window, select Refrigerant Use.

Note

All fields which are marked with an asterisk '*' are mandatory.
In the Add New Data Record fields, enter the start and end dates, reference ID, and the unit quantity of the refrigerant used in kilograms. A reference ID for a refrigerant data record can come from an invoice number or an internal code that you use to refer to a data entry.
In the Add New Data Record dropdowns, select the activity input type, unit, and reference type.
(Optional) In the rest of the Add New Data Record section, enter and select any other data type specific information for the new refrigerant data.
(Optional) In the Reference Documents field, select Add New Documents to add a reference document such as a Utility Bill or Purchase Order.
(Optional) In the Notes field, enter any other information or comments for the new refrigerant data.
Select Save to finish adding the data.

Adding refrigerant or air conditioning data using Screening method

Note

Air-conditioning and Refrigeration data cannot be uploaded to the Diligent ESG system, the data must be entered manually. This type of data is added once or twice a year.

The Screening method relies on the use of emission factors which are equipment specific and requires the following specific information:

Type of equipment
Refrigeration unit make or model
Number of units
Refrigerant type (as shown by A in the below image)
Equipment charge capacity (kg) (as shown by B in the below image)
Number of service years used during this reporting period (0.5 = six months)
Annual leakage rate (%)

Select Data Management and select GHG Activities.
Use the Organisation and Geographic tabs or the column filter fields to search for an activity.
Select Select beside the refrigeration or air conditioning activity that you want to add data to using the Screening method.

Important

The user only sees activities for facilities or assets and buildings that they have been granted access to by an Administrator.

Select Add New Data and in the Add Record window, select Refrigerant Use.
In the Add New Data Record fields, enter the start and end dates, refrigeration unit make or model, number of units, equipment charge capacity, reference ID, and the annual leakage rate.

Note

All fields which are marked with an asterisk '*' are mandatory.
In the Number of Service Years used during this Reporting Period field, enter a decimal number for the service years during this reporting period, where 0.5 equals 6 months or 1 equals a year.

Note

The start date and end date are not used in the calculation of the refrigerant emissions, the Number of Service Years used during this Reporting Period is. It is important you input the correct information.
In the Add New Data Record dropdowns, select the type of equipment, refrigerant type, and reference type.
(Optional) In the Reference Documents field, select Add New Documents to add a reference document such as a Utility Bill or Purchase Order.
(Optional) In the Notes field, enter any other information or comments for the new refrigerant data.
Select Save to finish adding the data.

Calculating annual leakage rate percentage

If you do not know the leakage rate, you can use an estimated annual leakage rate for the type of equipment. Choose from the lists below:

DEFRA UK

Equipment type	Estimated annual leakage rate
Domestic Refrigeration	0.30%
Small Hermetic Stand-Alone Refrigeration Units	1.50%
Condensing Units	10.00%
Centralised Supermarket Refrigeration Systems	17.00%
Industrial Systems	8.00%
Small Stationary Air Conditioning	3.00%
Medium Stationary Air Conditioning	6.00%
Large Stationary Air Conditioning (Chillers)	3.00%
Heat Pumps	6.00%
Land Transport Refrigeration	15.00%
Marine Transport Refrigeration	39.00%
Light-Duty Mobile Air Conditioning	10.00%
Other Mobile Air Conditioning	10.00%

IPPC all countries leakage rates

Default assumptions from IPCC Good Practice Guidelines

These values are from IPCC Good Practice Guidelines and Uncertainty Management in National Greenhouse Gas Inventories (2000). These default values are provided for reference purposes only as their wide range can result in highly variable calculation outcomes. If a value is chosen from within the range, that value should be used consistently from reporting period to reporting period or year to year. They should only be used if entity-specific data are not available, but an inventory that uses these values should be considered preliminary.

Application	Estimated annual leakage rate
Domestic Refrigeration	0.1 - 0.5 %
Stand-Alone Commercial Applications	1 - 10 %
Medium and Large Commercial refrigeration	10 - 30 %
Transport Refrigeration	15 - 50 %
Industrial Refrigeration including Food Processing and Cold Storage	7 - 25 %
Chillers	2 - 15 %
Residential and Commercial A/C, including Heat Pumps	1 - 5 %
Mobile Air Conditioners	10 - 20 %