Analyse Situation

1. 7 Analyse Situation look at the product in different ways

2. Washing Machine detergent water machine textile

3. How to Analyse analyse documentation document findings analyse find information create analyse system collect ideas analyse product develop product + system product

4. Documentation document number folder title article 5 keywords note database calculation experiment report storageon number documents never removed except for copying

5. Collecting Information talking colleagues experts customers Internet used how? a bit! reading surroundings? product customer(user)? equipment?

6. Starting with 'the' Customer customers people at home, washing textile but there are also other stakeholders your own company retailers environmental authorities start thinking on what you would like to ask these people

7. Splitting the System water + detergent in / out analysis soiled textile clean textile dirty water good enough for the lay-person good enough to help you further

8. Ideas from Splitting with more textile, you need more water more detergent a sensor to measure the loadand dose water and detergent you can reduce the washing time with more detergent trade-off between time and cost?

9. In / Out (2) water detergent 50 L 100 g textile (clean) textile 5 kg soil 100 g water soil detergent splitting via amounts

10. energy matter info In / Out (3) electricity wool / cotton heat

11. Sub-Systems water detergent centri-fuge clean textile dirty textile washer water these may be separated in space

12. Process Steps (1) dirty laundry add water a different way of splitting add detergent add heat gives some idea of time wash rinse centrifuge clean laundry

13. Process Steps (2) dirty laundry add water 20 oC can also show amounts add detergent add heat can show conditions 60 oC wash rinse 20 oC centrifuge 400 g clean laundry

14. Splitting the Product chemistry equilibrium properties structure mechanical and flow properties changes in time

15. Chemistry (1) washing agents dirts particles splitting via types of substances water soluble calcium 'builder' 'chemical' taking-apart fat / oil surfactant stains (wine) bleach protein (egg) enzyme

16. Chemistry (2) calcium removal by ion exchange: bound to zeolite splitting by reactions bleaching sodium percarbonate H2O2 H2O + OOH- basic solution OH- powerful oxidant using enzymes enzyme biopolymer H2O + CO2 + other

17. Equilibrium surfactant emulsion water chocolate fibre adsorption equilibrium

18. Structure – Textile fibres 10 mm 0.2 mm 0.7 mm yarns voids between yarns voids between fibres fibres space between textile 1 2 3 4

19. Mechanical and Flow Properties solids liquids elasticity viscosity hardness yield stress in between multiphase mixtures, polymer solutions rheological parameters

20. Product - System Interactions inside the drum bending and stretching distributing water distributing detergent

21. 1 2 3 4 Four Regions flow into machine free liquid between yarns between fibres fibres (dense) diffusion (slow) flow leaving machine bending (fast)

22. Differential… elements with scale of fibres dz dy dx

23. Which Way? you can split a product in many ways there is no single best way – you have to try begin simple try several ways then advance complicated models seldom provide new ideas splitting is only an aid to understanding

24. Summary ‘splitting' a product: devices matter customer needs in / out chemical matter composition energy reactions information rates process steps equilibria sub-systems structure looking inside mechanical properties differential flow properties