IRI Workshop - Hydrocarbon Refrigerants for Refrigeration Contractors

19 Nov 2019

Training workshop organised by the Institute of Refrigeration Ireland


How to book 

To reserve your place email

Booking will be open to IRI members until Monday 11th November and to all from 11th November. Places will be assigned in order of date and time of reservation request. (The IRI may apply a limit to the number of attendees from any one company)

Fee is €50 for IRI members and €95 for non members. 


Date and Venue

Tuesday 19 November from 9.30 to 4.30 p.m. (sharp) 

Clayton Hotel, Liffey Valley, Dublin



 Hydrocarbon refrigerants offer an efficient and low GWP alternative to HFCs in retail, commercial and industrial refrigeration.  Hydrocarbon refrigerants are already in widespread use in domestic and retail refrigeration in Ireland, and also in commercial and industrial chillers.  With the recent increase in allowable charge from 150 to 500g in commercial cabinets, the scope has expanded for even wider use.


The workshop is intended for those involved in the supply, installation and maintenance of refrigeration equipment using hydrocarbon refrigerants.


The workshop will cover;

  • Why hydrocarbons are such good refrigerants and which hydrocarbons should be used
  • What the standards say about maximum charge
  • How to determine or increase the allowable charge
  • What future standards might say regarding use of hydrocarbons
  • Developing Risk Assessments and dealing with the hazards of refrigerants


The Trainer:

Daniel Colbourne is a global specialist in the use and application of hydrocarbon refrigerants.

Based in England, Daniel sits on the working groups for a number of EN and ISO standards including EN 378 and ISO 60335.

He is a member of the UNEP Refrigeration Technical Options Committee (RTOC) for the Montreal Protocol and represents GIZ Proklima.  He has delivered presentations for the IRI in 2016 and 2018.



Introduction to hydrocarbons for refrigeration.

  • What hydrocarbons are
  • Why they are used as refrigerants
  • The most common hydrocarbons used in refrigeration systems today
  • What types of equipment are using hydrocarbon refrigerants at present


What the current EN 378 says about Practical Limit for refrigerants

  • Where to find the relevant tables from EN 378 – 2016
  • Two calculations, one for toxicity and one for flammability


Determining the Practical Limit for the hydrocarbon charge for a refrigeration system

  • How to use the EN 378 tables to calculate the maximum allowed charge of refrigerant
  • Sample calculations for real systems


Proposed changes are for the next amendment or revision of EN 378

  • What revisions are proposed to facilitate the safe increased use of hydrocarbons in refrigeration
  • Sample equations currently being discussed in the EN 378 Working Group
  • Use of Additional Measures to allow increased refrigerant charge


EN 60335 – Particular Requirements for Commercial Refrigerating Appliances

  • The recent increase in allowable charge from 150 to 500g – what this means for suppliers and installers


Hydrocarbon Refrigerant Leaks:

  • How hydrocarbons behave when they leak from a refrigeration system
  • Modelling how refrigerants mix with air in a room
  • Leak hole size for modelling of leaks
  • Upper and lower flammability limits – what they mean
  • How easy or difficult is it for hydrocarbons to ignite


Risk Assessments for hydrocarbon refrigerants

  • Practical information relating to Risk Assessments for hydrocarbons
  • The principal hazards of hydrocarbon refrigerants
  • How to determine the risk from the flammability of hydrocarbons
  • The need for a site-specific assessment where multiple systems are installed on one site (e.g. a retail store)


Sources of Further Information:

  • Industry guides
  • EN Standards
  • Suppliers and Associations promoting Hydrocarbons


Open Session for Contractors:

  • Q&A
  • Designing an actual HC system
  • Examples from retail stores
  • Opportunities to refine the approach to designing systems with Hydrocarbons
  • Tools and equipment
  • Training and certification


Attendees are welcome to bring their copy of EN 378.