University of Twente Student Theses
Internship report PCV Group
Barts, Sjoerd (2019) Internship report PCV Group.
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| Abstract: | This internship consisted of two parts. One individual project on which 50% of the time was spend was on the development of a new prototype coffee brewing mechanism for project Carlo. The other 50% of the time was spent on several projects in project teams for clients and other activities. These other projects include development on a new electric paint sprayer, medical ear sensor, an alternative to PUR foam, and a cow milk sampler. Other activities include a Solidworks course, internal engineering courses and a visit of the Hannover Messe Industrie fair. Project Carlo is a modular experimental setup for a fully automatic espresso coffee (EC) machine. The performance of EC machines can be improved by improving the homogeneity of the ground coffee bed used for making coffee in a process called percolation. The goal of the project was to develop and integrate a mechanism to improve the quality of the coffee made by automatic EC machines by improving the brew chamber. From a pre-analysis it followed that the main problem is that in current machines the coffee bed is not properly homogenised with respect to the local thickness of the coffee bed, resulting in an uneven extraction and thus bad tasting coffee. By using a tool used within PCV Group for problem analysis the requirements were set by performing a Critical to Quality (CTQ) analysis. Subsequently concepts solutions were created by utilising TRIZ. The most promising concept utilising a specifically designed mixing impeller was worked out using a design methodology of "fail fast learn fast". This was done by making three prototypes with increasing complexity produced with rapid prototyping technologies. A functional prototype was realised that could produce an even coffee bed and meet most of the requirements set by the CTQ analysis. The results and recommendations were presented to the organisation including management and perceived as successful. |
| Item Type: | Internship Report (Master) |
| Faculty: | ET: Engineering Technology |
| Programme: | Mechanical Engineering MSc (60439) |
| Link to this item: | https://purl.utwente.nl/essays/86350 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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