Feature
CHILLERS VERSUS VRF :
A PLACE FOR EACH TECHNOLOGY
By Benjamin Brits
For some time now in the market there has been fierce discussion , reasoning , and rationale for each of these solutions , but which is the right choice for your application ?
The “ battle for supremacy ” of these systems has in fact been ongoing for years accompanied with some strong opinions and statements that surface . I remember vividly that one of my first interactions in the HVAC & R industry was an article presented by an experienced engineer around making unsubstantiated comments around this very subject matter – and here we are more than two years down the line already .
It is quite clear from our dealings in the local market since then , that there is a definite preference for one solution over the other when considering different role players ’ views , and the installations we get to visit . But , for the record , the same is true from examples all around the world - thus indicating that there is strong ongoing support for each respective solution . When you go and research the differences between these system-types further , you will find comments that go far beyond two years .
Taking on these sorts of topics in reality involves some quite complex decisions that can ’ t always be covered to the fullest degree that they deserve , and by no means does this Journal advocate for , or intend to imply , that one technology is better than the other . This article aims to offer information based on research , industry engagement and a glimpse of future trends that may influence the way in which equipment is selected . The information also aims to offer an alternative perspective on factors that could impact such choices that may not be knowledge to all . To answer the simplest question , yes , both of these system-types are here to stay .
It has been suggested that one of the trickiest tasks for a facility owner , consultant , or contractor ( whoever is ultimately responsible for the decision ) is in selection of the best equipment for providing the best outcome . Now taking that a step further , the “ best outcome ” can also mean different things to different people . While some are only concerned about capital investment , others may prioritise operational aspects , and still others may demand reliability at all costs , or the latest technology and functionality . There are obviously several thought processes involved in choosing either of these systems as the correct one for your commercial or industrial HVAC system proposal .
© RACA Journal
VRF systems require small plantroom spaces and can easily be hidden behind facades , within service levels or on small platforms .
SUITED APPLICATIONS FOR EACH SOLUTION As with nearly all technology , including the HVAC & R industry , it ’ s about understanding the particular application - which is multi-layered in itself . Today certain industries , such as this one , also have to apply forethought around how choices or recommendations will play out in time related to trends , new design methodology , legislation and training requirements for an increasingly changing world .
So , it ’ s not only about all of the regular tick boxes : base heat load , capacity , operating conditions and related factors etc – there are now energy demand issues and a growing responsibility from the client ’ s perspective around operational costs , sustainability and environmental ratings to name a few . What also needs to be factored nowadays are the need for maintenance and the availability of technical expertise . This is relevant locally where you may want to get in the absolute latest technology , but without the correct support structure the costs of service will escalate .
www . refrigerationandaircon . co . za RACA Journal I July 2022 17