Important announcement

Dear visitor,

Please note that this OpenCourseWare platform will be replaced at the end of 2026 by a new platform (under the same url ocw.tudelft.nl).

Courses and their contents that are currently available the platform will partly be migrated. URL’s for this content will change and content might be unavailable for some time. In addition, some courses will not be available anymore.

If you are linking to specific courses on this platform (for instance for your students), please take timely measures to avoid problems with access. Possible actions are:

  • Download the materials to your local platform (laptop, server)
  • For educators only (including TU Delft lecturers): Contact us at ocw@tudelft.nl and inform us what course you are using in what context (institute, program, period of use, number of students). We will research (in collaboration with the authors of the course) and decide if we will migrate the course, and if yes, can supply you with a new url.

Thank you.

3.2.1 Long lasting products

Course subject(s) Module 3. Longer Lasting Products

SHARE YOUR THOUGHTS: LONG LASTING PRODUCTS

Do you have a product that has lasted much longer than you expected it would? What qualities does this product have? What makes it last so long?

We’re curious to hear about your experiences! Post a short description of the product and its special qualities, in the discussion forum below.

Use the following format:

PRODUCT
I have this amazing light bulb.

HOW LONG?
I’ve had it for 15 years now. It was only supposed to last 1 year, but I’ve used it every night for 15 years.

SPECIAL QUALITIES?
I’m not sure; perhaps the thin wires inside this lamp are more robust than in the average light bulb.

Creative Commons License
Circular Economy by TU Delft OpenCourseWare is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at https://ocw.tudelft.nl/courses/circular-economy/.
Back to top
[sg_popup id=6]