Challenges of and Options for Refrigerant Selection

2 Nov 2023 16:30 to 17:30

Alex Cohr Pachai presentingJoin the IOR to hear from J&E Hall Gold Medal Winner Alexander Cohr Pachai FInstR as he discusses what end users should be aware of when choosing between types of refrigerants.

How to hear the presentation 

Download the paper

The paper is available here.

Date and time

Date: 2nd November 2023

Time: 16:30 -17:30 GMT


Gulbenkian Room, Park Crescent Conference Centre, 229 Great Portland St, Marylebone, London, W1W 5PN 


Many different refrigerants are available, but it can be difficult to decide which is the most suitable for a particular application. A refrigerant can be dismissed as being unsuitable due to a perceived hazard, however, it is still possible to use the refrigerant safely. All refrigerants have their strengths and weaknesses and in this paper presentation, we will describe how the working fluids can be utilised in a safe way. This presentation will discuss the refrigerants: hydrocarbons, carbon dioxide and ammonia.


Alexander Cohr Pachi FInstR has a broad experience with both commercial and industrial refrigeration. He spent over 20 years working for Johnson Controls, has been a consultant for different UN bodies and has presented numerous technical papers at international peer-reviewed conferences. 
Beginning his career as a refrigeration technician apprentice in 1978 he has had a diverse career working in many roles including education, sales, marketing, production, design, innovation and communication and was involved in the sales of the first CO2 cascade systems both in Denmark and New Zealand.