INCORPORATING COLD CHAIN
PROJECT
“ Forty years ago , system design relied on manual calculations and estimates . Even now , old systems are simply replaced on a ‘ like-for-like ’ basis with no consideration given that the original systems could well have been over-designed . This practice has persisted despite the availability of computer programmes and later , more sophisticated tools .”
Today , the industry benefits not just from highly advanced computer programs but artificial intelligence , yet some practices remain outdated . “ The use of advanced design tools should be standard practice , not optional . We have access to powerful software that can perform detailed heat load analyses and optimise system design ”.
Revamping air conditioning units is an ongoing process that requires a meticulous and critical approach . Pengelly explains that the key to successful refurbishment lies in evaluating whether a unit can be effectively upgraded or if it should be replaced entirely . This assessment often involves a thorough review of the existing equipment , considering both the potential benefits and limitations of refurbishment .
Effective refurbishment often hinges on the ability to work closely with contractors and suppliers . For instance , when faced with urgent timelines , it ' s crucial to coordinate with manufacturers to expedite the process . An example of this was one Pick n Pay refurbishment project where new equipment was needed urgently . By collaborating with the manufacturer and emphasising the urgency , the team managed to get a new
AC Smart 5 Controller . LG EEV kit .
unit built in just six weeks , despite the usual 12-week lead time .
In environments like supermarkets , where operational continuity is critical , the challenge is to complete refurbishments as quickly as possible , without disrupting daily operations . “ It ’ s essential to plan refurbishments in stages , ensuring that air conditioning systems remain functional for as long as possible throughout the process . More peripheral work , such as painting and lighting , can be deferred in order to accelerate the installation and commissioning of the critical equipment ”.
Refurbishment typically involves integrating new parts and technology to enhance performance . For instance , HC Aircon and Zeihl Abegg provide new components such as coils and plug fans , which are crucial for modernising older units . These components often offer better efficiency and reliability compared to the original parts .
“ Refurbishing a unit is not a one-sizefits-all solution . It requires an engineering assessment to determine if refurbishment is feasible and cost-effective . Factors such as the age of the equipment and the condition of the existing structure must be carefully considered . The decision to refurbish is based on a thorough inspection of the existing unit . Only a relatively small proportion of units are considered suitable for refurbishment .
“ By integrating modern components and utilising advanced technologies , refurbishment can extend the lifespan of older units while enhancing their efficiency . Effective refurbishment also requires a thorough understanding of engineering principles and cost considerations , ensuring that decisions are based on a comprehensive evaluation of the equipment ' s condition and potential benefits .
The advent of computer programs and advanced design tools has transformed the approach to air conditioning system design and replacement .
COLD LINK AFRICA • November / December 2024 www . coldlinkafrica . co . za 23