Envirotainer builds containers that are specialized in transporting of temperature
sensitive products these containers are customized for airplanes. The containers are
then leased to other companies, most often to pharmaceutical companies.
Envirotainer are based in Lagga, Knivsta. It is also here where the production of the
containers is held. The container RAP T2 was designed in the early 80ies. The RAP
T2 contains a fleet of about 1220 containers spread all over the world. This container
model needs an update in order to optimize its performance. One of the
improvements is achieved by optimizing the UA-value that is too high. A lower
UA-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 in
the 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 to
improve the construction with a new insulation material that would optimize the
The work started off with an investigation of insulation materials. The most
interesting insulation materials were weighted against each other. The result showed
that Divinycell was the best insulation material for the design.
Then different concepts were made, concept A were the whole floor was redesigned
and 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 designed
in PTC Creo.
A prototype was built for UA-value testing. The prototype was then tested and
measured against the original container in order to see how much the UA-value was
lowered with the new design. And the result of the test showed an improvement of
almost 37 %. The UA-value went from 25,40 W/K with the original container design
to 16,05 W/K with the prototype design. This shows that an update of the floor
design is in order to make the container performance better and more stabile.
2012. , 50 p.