Analyse Situation

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Analyse Situation
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• look at the product in different ways

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Washing Machine
detergent
water
machine
textile
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How to Analyse
analyse
documentation
document findings
analyse
find information
create
analyse system
collect ideas
analyse product
develop
product system
product
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Documentation
document
number
folder
title
article
5 keywords
note
database
calculation
experiment
report
storageon number
documents never removed except for copying
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Collecting Information
talking
colleagues
experts
customers
Internet
used how?
a bit!
reading
surroundings?
product
customer(user)?
equipment?
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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
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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
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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?
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In / Out (2)
water
detergent
50 L
100 g
textile
(clean) textile
5 kg
soil
100 g
soil
water
detergent
splitting via amounts
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In / Out (3)
electricity
wool / cotton
heat
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Sub-Systems
water
detergent
centri-fuge
clean textile
dirty textile
washer
water
these may be separated in space
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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
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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
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Splitting the Product
chemistry
equilibrium properties
structure
mechanical and
flow properties
changes in time
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Chemistry (1)
washing agents
dirts
splitting via types of substances
particles
water
soluble
calcium
'builder'
'chemical' taking-apart
fat / oil
surfactant
stains (wine)
bleach
protein (egg)
enzyme
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Chemistry (2)
calcium removal by ion exchange
bound to zeolite
splitting by reactions
bleaching
sodium percarbonate
H2O2
H2O OOH-
OH-
basic solution
powerful oxidant
using enzymes
enzyme
biopolymer
H2O CO2 other
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Equilibrium
surfactant
emulsion
water
chocolate
fibre
adsorption equilibrium
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Structure Textile
fibres
10 mm
0.2 mm
0.7 mm
yarns
voids between fibres
voids between yarns
fibres
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3
space between textile
1
4
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Mechanical and Flow Properties
solids
liquids
elasticity
viscosity
hardness
yield stress
in between
multiphase mixtures, polymer solutions
rheological parameters
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Product - System Interactions
inside the drum
bending and stretching
distributing water
distributing detergent
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Four Regions
flow into machine
free liquid
between yarns
between fibres
fibres (dense)
diffusion (slow)
bending (fast)
flow leaving machine
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Differential
elements with scale of fibres
dz
dy
dx
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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
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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