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21 November 2018

Can we design large refrigerated plants today to run at a fraction of historical costs?

At J.V Tierney & Co, our M&E Engineers have been employing innovative techniques designed to improve resource efficiency in our client’s projects for many years. When engineering consulting firms tackle projects in food retail distribution, they have historically required conventional refrigeration equipment on a grand scale, which uses huge amounts of energy and produces CFC (greenhouse) gases, known to be harmful to the ozone.


Overall refrigeration technology has advanced somewhat in recent years, which has resulted in significant improvements in power consumption and the elimination of the production of greenhouse gases. One approach used by J.V Tierney & Co., known as the CO2/NH3 cascade system, can be used in electrical engineering designs to refrigerate large areas at a fraction of historical costs.


The Benefits
This electrical services engineering technology uses 2 central refrigeration units that work in tandem, maximising the cooling effect of the ammonia and CO2 contained within. The system draws heat away from the cooled areas, recirculating cooled liquid via its evaporators. Mechanical and Electrical Engineering Consultants employ CO2/NH3 Cascade hardware for a number of reasons:


  • It uses significantly lower amounts of power to operate

  • Lower installation and hardware costs when compared to two stage ammonia systems

  • RMP and PSM compliance costs less to achieve

  • The ammonia charge is significantly lower, again reducing operating costs

  • The technology is far less prone to condensation and the liquid ingress issues that it causes


This technology was included in the design our electrical and mechanical engineers produced for the major Lidl distribution centre in Newbridge. More details of the project can be found here http://bit.ly/2Nvfjxq.


Around a third of this massive distribution centre is to be refrigerated, which was tackled by our consulting engineering design team by designing a highly efficient CO2-Ammonia refrigeration plant - which has an ozone depletion potential of 0. Quite incredible when you consider the size of the plant itself.


We’re extremely proud of the design work our electrical services engineering team on this project, which is projected to be completed in November of 2019.


At J.V Tierney and Co, our M&E Engineers are well versed in an array of modern and established design techniques that are geared towards minimising resource consumption and the production of these so called greenhouse gases.


If you would like to know more about CO2/Ammonia cascade refrigeration and how it could help you on your next building project, take a look at our website www.jvtierney.ie  where you’ll find everything you need to know and a number of examples of our past work. Alternatively, if you’d like a chat with one our expert team, call us now on 01 421 4900.