F Gas Training Series

F Gas Training

F Gas Training

The ideal way of reducing F gas or ODS emissions to zero is to use an alternative refrigerant, such as CO2, ammonia or hydrocarbons. These three refrigerant types have all been used in RAC Systems. However, before you invest you must take care that your alternative design is cost effective and has the lowest “overall carbon footprint”.

Refrigeration plants give rise to two main types of greenhouse gas emissions:
Firstly: Direct emissions of refrigerants such as F gases through leakage.
Secondly: “Indirect” emissions of CO2 from the power station supplying the plant with electricity.
For most refrigeration plants it is the energy related CO2 emission that is the dominant part of the overall carbon footprint. Hence, it is essential that a system with an alternative refrigerant is equal to or better than an HFC system in terms of energy efficiency.

A brief summary of the advantages and disadvantages of each refrigerant type is shown below:
Refrigerant – HFC
Advantages – Widely used, Non-toxic and non-flammable
Disadvantages – High GWP (Global Warming Potential).
Equipment containing HFCs has historically had high levels of leakage; however this is not an intrinsic characteristic of the refrigerant.
Refrigerant – Ammonia
Advantages – Zero GWP
Disadvantages – Highly toxic and flammable.
Must be used with secondary refrigerant, which can lead to poor efficiency.
Refrigerant – CO2
Advantages - Zero GWP (net), Good potential for heat recovery, Good potential for energy efficiency
Disadvantages - Operates at very high pressure, Little practical experience in service companies, Additional costs associated with energy efficiency optimisation.

Refrigerant – Hydrocarbon
Advantages - Low GWP
Disadvantages – Highly flammable.
Must be used with secondary refrigerant, which can lead to poor efficiency.

Comments are closed.