Optimering av UA-Värde
Förbättring av en containerkonstruktion
Envirotainer builds containers that are specialized in transporting of temperaturesensitive products these containers are customized for airplanes. The containers arethen leased to other companies, most often to pharmaceutical companies.Envirotainer are based in Lagga, Knivsta. It is also here where the production of thecontainers is held. The container RAP T2 was designed in the early 80ies. The RAPT2 contains a fleet of about 1220 containers spread all over the world. This containermodel needs an update in order to optimize its performance. One of theimprovements is achieved by optimizing the UA-value that is too high. A lowerUA-value gives the performance of the container more endurance and more stability.Initial testing that was made in the beginning of the project showed that the floor inthe container was the biggest stand alone module benefiter of the high UA-value.With that knowledge it was decided that my work should be about the possibility toimprove the construction with a new insulation material that would optimize theUA-value.The work started off with an investigation of insulation materials. The mostinteresting insulation materials were weighted against each other. The result showedthat Divinycell was the best insulation material for the design.Then different concepts were made, concept A were the whole floor was redesignedand concept B were an extra insulation module was designed to fit the existing floor.The concepts were weighted against each other in order to choose the final concept.Concept A was the best alternative and was chosen. The concept was then designedin PTC Creo.A prototype was built for UA-value testing. The prototype was then tested andmeasured against the original container in order to see how much the UA-value waslowered with the new design. And the result of the test showed an improvement ofalmost 37 %. The UA-value went from 25,40 W/K with the original container designto 16,05 W/K with the prototype design. This shows that an update of the floordesign is in order to make the container performance better and more stabile.