home_icon.pngUnit 3, 9 Allens Rd,  

                East Tamaki,

                Auckland 2013

                New Zealand

phone_icon.png +64 9 2742099

COP21 becomes International Law

COP21 becomes International Law

Climate Change Agreement COP21 becomes International Law

COP21 is an international emission reduction agreement, entered into at the 2015 United Nations Climate Change Conference that became law on 4 November 2016.


The real implication of this law is that future energy efficiency is of paramount importance. The target is carbon neutrality by 2050 and limiting global warming to a maximum of 2˚C or 3.6˚F this century.


The major cost implication to the end user is that owners of low energy efficient plants will need to purchase carbon credits and so this will now have a double impact: a) paying for the initial excessive energy use and b) purchasing carbon credits to compensate for the plant inefficiency.


In the past few years a group of like thinking engineers (Scantec and FSL) have been developing energy efficient freezing systems such as the patented CF Multipass™ and Variable Retention Multipass (VRM) freezers which, when compared to standard systems, offer an energy saving of up to 40% (see separate paper “MULTIPASS™ - The Secret to Improving Freezing Efficiencies”).


Evaporator configurations and refrigerants were also investigated:

It is well known and documented that in order to achieve maximum energy efficiency in an industrial refrigeration system, natural refrigerants are the first choice. There are five natural refrigerants; ammonia, carbon dioxide, hydrocarbons, water and air. It is also well known and proven that of the many different ammonia (NH3) refrigeration system configurations, the low charge NH3 concept (when designed correctly) is the most efficient and safe.


Low charge NH3 systems feature NH3 inventories 3 to 5 times lower than liquid overfeed systems. If comparing current plate freezer designs, the NH3 inventory of low charge NH3 systems is 50 times lower. This means a low charge NH3 system can perform significantly higher cooling capacities before the plant is subjected to PSM/RMP or similar safety regimes. This significantly reduces compliance costs.


The combined effect of Multipass™ and low-chargeNH3 evaporators results in:

  • The most efficient air to product heat transfer

  • The most efficient energy usage per unit frozen

  • The smallest carbon foot print per unit frozen

  • The least operating cost

  • The most compliant and safe operating system

  • And above all: future proofing your plant.



    To find out how to deliver significant savings to your organisation, contact Freezing Solutions today.