Articles
From natural ice to modern cooling systems — the history of refrigeration technologyHistory · 9 minCool is one of the technologies that most quietly changed everyday life. Follow the path from ice cellars and natural ice through the first mechanical cooling machines to today's electronically controlled systems — and see why the cooling technician's trade today is about environment and refrigerants as much as getting a system to cool.A working day as a cooling technician — service, troubleshooting and installation...Weekday · 8 minThe refrigeration technician's day alternates between scheduled service, acute troubleshooting and new installations — often at widely different customers the same week. Here you get an insight into how a typical job progresses, why systematic troubleshooting is the core of the field, and what distinguishes good service from a quick fix.Tools, measuring equipment and coolantTools and equipment · 9 minThe refrigeration technician's equipment ranges from gauge sets and leak detectors to vacuum pump and brazing equipment — and from the physical tools to the refrigerant itself, which is the field's most regulated substance. Here we review the most important equipment, what it's used for, and why proper handling of refrigerant is a core competence.Safety, certificates and rules in refrigerationSafety and rules · 9 minThe refrigeration technician works with pressure, open flame, electricity, cold and regulated refrigerants — and with certification requirements to do it legally. Here we review the physical hazards, the most important safety habits and why the field is tied to personal certificates and refrigerant documentation.Specialties and career as a refrigeration technicianCareer · 8 minThe cooling trade is broad and in demand, and it gives many directions to go in. Here we look at the areas a cooling technician can specialise in — from commercial and industrial cooling to heat pumps — and why the trade plays a growing role in the green transition.The education's structure from basic course to journeyman certificate.Education · 10 minThe refrigeration technician apprenticeship is structured in stages: you can leave as a cooling assistant or continue and become a refrigeration technician. Here you get an overview of basic courses 1 and 2, the main course's alternation between school and apprenticeship, the total duration, the entry requirements and how you get in.PLACEHOLDER_13Job and career · 8 minAs an apprentice in the refrigeration trade you are in the main course employed in a company and receive trainee wages while you learn. Here we look at how trainee wages typically increase through the course what a collective agreement means what adult trainee wages are and what conditions apply when you are fully trained.Rules, authorisation and certificates in refrigerationRules and legislation · 9 minAs a refrigeration technician you work with refrigerants pressure and electricity – an area that is tightly regulated by both Danish law and EU rules. Here we look at the journeyman's certificate refrigeration fitter and F-gas certificates mandatory safety courses and why the rules on refrigerants have been tightened.Work environment safety and ergonomics in depthSafety · 9 minRefrigeration technicians work with pressurized refrigerants, cold, electricity, brazing and heavy equipment – often on roofs, in engine rooms or in well freezers. Here we go in-depth with the hazards you encounter and how you work safely with pressure, refrigerant, hot work and your body in the long run.The industry today — workplaces, job opportunities and futureJob and career · 8 minCool and heat pumps are found everywhere something needs to be kept cold or heated efficiently. Here we look at the many types of workplaces, what drives demand, and how the green transition and heat pump wave shape the trade's future.Further and continuing education – what you can build onEducation · 9 minYour journeyman certificate as a refrigeration technician is not a dead end – it's a springboard. Here we look at vocational courses and certificates, technical business academy programmes, installer and marine engineer routes, and how access courses can open the way for engineer studies.The cooling cycle process in h,log p diagram — superheating, subcooling and efficiencyTechnique · 9 minAll refrigeration engineering calculations – from the first tasks of the basic course to the apprentice exam's system assignment – are based on the same tool: the h,log p diagram. Here you get a thorough review of how to draw the cycle process, what overheating and subcooling mean in practice, and why these two quantities are among the most important values you read from an installation.Refrigerants' classification and GWP — from CFC to natural refrigerantsMaterials · 9 minRefrigerants are classified according to both flammability and toxicity and how strongly they affect the climate (GWP). Here you get to grips with the letter-number codes, see the most important refrigerants set against each other, and understand why EU's F-gas regulation in these years is forcing the industry towards natural refrigerants.CO2 and ammonia in practice — natural refrigerants in supermarket and industryTechnique · 9 minCO2 and ammonia are the two natural refrigerants you most often encounter as a refrigeration technician in supermarket and industrial cooling respectively. They behave very differently require each their own safety measures and Danish companies are among the world's leaders in both. Here you get a practical introduction to what makes them special.Regulation components and electronic control – expansion valves, pressure switches and PLCTechnique · 8 minA cooling system regulates itself through a range of components that measure and adjust pressure temperature and flow. Here you get an overview of expansion valves pressure switches and thermostats — and the electronic and PLC-based control that today binds it all together on commercial and industrial systems.Heat pumps in depth — types, COP and SCOPTechnique · 8 minA heat pump is basically a cooling system used in reverse and as a cooling technician you are therefore already closer to heat pump technology than you might think. Here we look at the most important types of heat pumps the difference between COP and SCOP and why your skills are crucial for the green transformation of Danish residences.Soldering and pipe work — hard soldering, nitrogen purging and pressure testingTools and equipment · 8 minPipe joints are where many systems first go wrong if the work is not done correctly. Here we cover hard soldering of copper pipes in practice — materials, nitrogen purging and the standards behind — as well as leak testing, which is the final and decisive check before the system can be filled with refrigerant.Statutory coursesRules and legislation · 9 minHow often a cooling system should be leak-tested, and who may carry out the inspection, depends on the refrigerant quantity and type of system. Here you get an overview of the standard DS/EN 378 and the F-gas regulation's requirements for leak control and documentation — the rule set your service reports in practice must meet.