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Transcript of Powering Options in Technically Enhanced Textiles
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SAMI RANTASALOPOWERING OPTIONS IN TECHNICALLY ENHANCED TEXTILES
Bachelor of Science Thesis
Examiner: Professor Heikki Mattila
Submitted for review on 12 January2012
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ABSTRACT
TAMPERE UNIVERSITY OF TECHNOLOGY
Bachelors Degree Programme in Material Science
RANTASALO, SAMI: Powering options in technically enhanced textiles
Bachelor of Science Thesis, 22 pages
January 2012
Major: Production Technology
Examiner: Professor Heikki Mattila
Keywords: Smart textiles, wearable electronics, power generation, power har-vesting, technically enhanced textiles
The purpose of this thesis is to provide an interdisciplinary introduction of power sourceand power supply alternatives applicable to electronically enhanced textiles. Main ob-
jective is to remove the language barrier between textile and electronics oriented devel-
opers. It is written specially as a primer for people new to technically enhanced textiles.
Technological alternatives are introduced and a brief overview of the physical phe-
nomena behind them is given to the reader. Textile specific factors are examined to give
a better view on the challenges met when combining textile and electrical components
in production. Current and future power source alternatives applicable to textiles are
reviewed.
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PREFACE
I would like to thank Professor Heikki Mattila for examining this thesis. His courses
awakened my interest in technically enhanced textiles. This combined with my interest
in electronic gadgets formed this thesis subject. The work was carried out independently.
I would like to dedicate this thesis to my mother, Outi Rantasalo. I wish you would
have been here to see it finished.
Tampere 11.1.2012
Sami Rantasalo
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Contents
1 Introduction ........................................................................................................ 12 Energy dependent applications in textile context ............................................... 2
2.1 Wearable computers .................................................................................... 32.2 Smart textiles ............................................................................................... 4
3 Energy sources and storage ................................................................................ 53.1 Generators ................................................................................................... 5
3.1.1 Piezoelectric effect .................................................................................. 53.1.2 Electromagnetic induction ....................................................................... 63.1.3 Electrochemistry ...................................................................................... 63.1.4 Photoelectric & -voltaic effect ................................................................. 73.1.5 Thermoelectric & -voltaic effect ............................................................. 73.1.6 Static electricity ....................................................................................... 7
3.2 Accumulators .............................................................................................. 73.2.1 Battery ..................................................................................................... 7 3.2.2 Capacitor.................................................................................................. 8
3.3 Energy Harvesting ....................................................................................... 84 Limitations and possibilities in technically enhanced textiles ........................... 9
4.1 Textiles and manufacturing ......................................................................... 94.2 Maintenance and environmental issues ....................................................... 94.3 Physical dimensions .................................................................................. 10
5 Current and future power source alternatives ................................................... 115.1 Fuel cells ................................................................................................... 115.2 Solar cells .................................................................................................. 125.3
Batteries .................................................................................................... 13
5.4 Supercapacitors ......................................................................................... 13
6 Summary .......................................................................................................... 147 Bibliography ..................................................................................................... 15
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TERMS AND DEFINITIONS
AC Alternating Current
COTS Commercial Off-the-shelf
CPU Central Processing Unit
DC Direct Current
DMFC Direct Methanol Fuel Cell
DSSC Dye-sensitized Solar Cell
LBP Lithium Polymer Battery
mAh milli-ampere hour; Unit of electric charge
MHz Megahertz; Unit used to describe the computing power of CPUs
PDA Personal Digital Assistant
PFC Portable Fuel Cell
RF Radio Frequency
SER Shk- ja elektroniikkaromu
WEEE Waste Electrical and Electronic Equipment
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1 Introduction
The plethora of electronic devices that people have is ever growing. They help or ease
our everyday lives, some just bringing us entertainment. As the world has become more
mobile the need for all those appliances to go with us has become a necessity. With so-
cial media and live information sources the need to access information regardless of
place and time, in real-time, pushes the development of electronic appliances and their
derivatives.
Most mobile gadgets like portable music players and cameras are small enough to
be carried in our pockets, bags and jackets. They're becoming smaller and thinner, easi-
er to carry with us. In fact they're becoming more and more ubiquitous. One vision is to
infuse these gadgets into something that we carry along all the time, for example clothes
and textiles.
All the same, most of them need a power source to run. This need is usually met
with rechargeable, low-voltage batteries. Regardless of the development of battery life
frequent recharging is unavoidable and a nuisance in the hectic life of 21st
century.
This paper is a literature review on alternatives to battery power sources. True to the
aforementioned infusion of textiles and electronics, the aspect is textile oriented. It is
directed to people working in the area of textiles with little knowledge of electronics.
This paper however does not go into details of electronics or electricity. Likewise this
paper might give an insight to electronically oriented people new to textiles. More im-
portantly it works as a common ground for both to co-operate successfully.After a brief overview of electronic devices designed for or around textiles and the
requirements they set, different energy source and storing methods are introduced. Next
technological alternatives to producing energy are presented and a brief overview of the
physical phenomena behind them is given to the reader. Textile specific factors are ex-
amined to give a better view on the challenges met when combining textile and electri-
cal components in production. Finally current and future power source alternatives are
reviewed.
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2 Energydependentapplicationsintextilecontext
Most of the electronics we carry with us are small enough to be slipped into our pockets
or bags. In the continuous race to make appliances smaller and lighter the next level
would be to embed them into our clothes, clothing accessories or even body. Ultimately
the functionality of the appliances would be ubiquitous to the users.
Ubiquitous or pervasive computing refers to a variety of devices integrated into eve-
ryday objects, environments and individuals. Those devices and their use may be totally
unnoticeable to the users. Wearable technology is a sub-set concentrating on ubiquitous
technology that is worn during their use. (1) Wearable computers and smart textiles
form two overlapping sub-sets as seen in Figure 1 below.
Figure 1 - Relationship among clothing technologies (2)
Energy needs mainly arise from the utilized electrical components and indirectly for
example from energy dissipation. Energy use between different types of components
varies remarkably so the energy needs for a system need to be evaluated uniquely and
implementation wise.
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2.1 Wearablecomputers
Wearable computers are a subset of wearable electronics. Barfield and Caudell define
wearable computers as computers worn on body that are fully functional, self-powered,
self-contained providing access to and interaction with information anywhere and at any
time (3).
Emphasis in wearable computers is more on having one computing unit to fill the
computing needs required. With no existing providers, they were initially somewhat
stripped versions of personal computers and other peripherals to accommodate the spe-
cial requirements set by the new substrate or platform human body. Due to advance-
ments in miniaturizing electronics and era of PDAs and smart phones, there are compa-
nies providing processors capable of adequate computing power to accommodate the
average users needs. They are a compromise between size, energy need and efficiency.
Figure 2 - Zypad WL1100 (4)
One commercial example is Zypad WL 1100 from Eurotech that is a wearable
computer based on XScale PXA270 processor. The 290 g weighing unit runs at 400
MHz in contrast to current laptops running at up to 2.4 GHz. The wrist-worn personal
computer runs on a 3.6 V 2200 mAh Li-Ion battery, providing according to the product
description 4+ hours battery life. (5)
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2.2 Smarttextiles
Smart clothes or textiles are a combination of electronic and non-electronic elements
adding to the features and functionality of the textile (1). In contrast to wearable com-
puters the electronic components are used to augment the textiles textile is not just to
provide a platform or a substrate for components. In addition in smart textile applica-tions external components such as sensors and actuators are used to achieve a set goal.
The computational needs in current smart textile applications are low or modest.
Most systems can manage with small microcontrollers (1), which can be run with low
voltage. The computational power is usually applied to managing and interpreting data
from sensors and actuators.
Figure 3 - Lilypad Arduino microcontroller board (6)
Lilypad Arduino is a microcontroller board that was designed to be used in electron-
ic textiles or wearable electronics projects. It runs at 8 MHz and has an operating volt-
age of 2.7-5.5 V which can be achieved with for example AA batteries. (6)
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3 Energysourcesandstorage
Electronic components need a source of electrical energy, one that can supply electricity
to all of the different components and consistently in active use. In extra low-voltage
applications, such as smart textile applications, electronic components usually run on
direct current (DC). A DC-application may still involve alternating current (AC), for
example in sensor signal processing, or be powered indirectly with an AC-power source.
The most common DC power source is an electrical battery. It is a device that con-
verts stored chemical energy into electrical energy. As such, it can be regarded as a gen-
erator.
Generators create electricity from other forms of energy. There are several other dif-
ferent methods of directly transforming other energy forms into electricity, besides the
electrochemical reaction that batteries utilise.
Batteries are divided into two categories: primary and secondary disposable and
re-chargeable, accordingly. A secondary battery can be regarded also as an accumulator.
It accumulates or stores the energy provided by a charger. Further on the text, battery
refers to a secondary battery.
3.1 Generators
There are several ways of transforming energy into electricity directly and indirectly.
Some of them, such as nuclear transformation, are more reasonable for commercialscale electricity generation. Others are applicable only for small or micro scale genera-
tion with the currently available technologies. Due to efficiency, application and other
issues they may not be able to power or charge electronics independently or as is.
Six fundamental phenomena stand out that would be applicable in textile context.
All the phenomena base on the principle, that a consistent difference of energy exists
between two areas (7). These phenomena are briefly described in the following para-
graphs.
3.1.1 Piezoelectriceffect
Pierre and Jacques Curie demonstrated in the 1880s that applying pressure or mechani-
cal stress on specific solid materials produced an electrical charge and in direct propor-
tion to the pressure applied. This is called the direct piezoelectric effect. Conversely, the
indirect piezoelectric effect refers to dimensional changes in the same material resulting
from application of a charge. (8)
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Exploiting this property, alternating current can be generated by cycling between the
different stages. Different stages are pictured in Figure 4, with the material under no
external force in the centre. Using multiple units multiplies the output.
Figure 4 - Simplification of piezoelectric effect in a material under deformation
3.1.2 Electromagneticinduction
The discovery of induction phenomenon is credited for Michael Faraday in early 1800s.
He stated that a changing magnetic flux or field will induce electric current in a closed
circuit.
The changing magnetic field is usually inflicted through kinetic force. A setup
where a magnet is moved inside a conducting coil is visualised in Figure 5.
Figure 5 - Magnet moving inside a conducting coil
3.1.3 Electrochemistry
Some chemical reactions create chemical energy. This chemical energy can do work on
the environment, for example mechanical work. In electrochemistry this work is electri-
cal and thus the chemical energy is converted into electrical energy. (9)
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When a battery is discharging, the chemical reaction involved produces energy.
Some of these reactions are reversible, but need external energy for it. The same amount
of energy that was released is now needed to reset the original recharged state.
3.1.4 Photoelectric&voltaiceffect
Light in itself is energy, electromagnetic radiation consisting of elemental physical par-
ticles, photons. The energy of photons can extract electrons from the surface of matter,
which is called the photoelectric effect.
In photovoltaic effect, the electrons are transferred between different areas within
the material. These areas differ in electrical properties and in combination with the
transferred electrons build up electrical energy.
3.1.5 Thermoelectric&voltaiceffect
Warmth or heat is manifestation of energy. Thermovoltaics and electrics depend on a
heat difference to produce an electron flow and thus electricity (7). The larger the dif-ference is the bigger the flow of electrons.
3.1.6 Staticelectricity
The exchange of electrons between materials can occur on contact and is known as the
triboelectric effect. One of the materials becomes positively charged and the other nega-
tively. The polarity and strength of the created charges depend on the materials and their
properties. (10)
Static electricity is sustained electric charges, positive and negative, between mate-
rials. These materials are of poorly conducting material inhibiting the charges from be-
ing discharged. (10)
3.2 Accumulators
An accumulator is an appliance which enables energy to be stored. In electrical context
energy can be stored in and discharged from either a capacitor or a rechargeable battery.
Capacitors are similar to batteries in that they both store an electrical charge. The work-
ing principle of these two electrical components also gives them their characteristics.
3.2.1 Battery
Most of the properties a battery has are defined by the working principle behind the
battery. The energy producing chemical reaction defines the speed a battery discharges
at. It also defines the charging time, as the recharging is basically reversing the reaction,
using external energy.
These reactions make batteries provide a steady, long flow of energy. Energy leak-
age is somewhat minimal so shelf life for a charged battery is long.
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3.2.2 Capacitor
In capacitors there are no chemical reactions involved. Capacitors consist of two con-
ductors, electrodes, separated by an insulating substance. When charged the electrodes
hold equal charges of opposite signs - an electric field holding the charge is created be-
tween them. (11)
Capacitors are able to release the charge instantly, basically as fast as the electrons flow.
The working principle of a capacitor makes using a capacitor to provide the same output
as a battery impractical, demanding enormous electrode surface area.
3.3 EnergyHarvesting
Energy or power harvesting, also called energy scavenging is a process where power is
derived from different available sources. There are numerous ambient energy sources in
different forms available even in our everyday environment. For example the air is full
of radio frequency energy produced by for example cell phones, WIFI, radio and TV
signals.
To tap into all available energy sources would be universal and adaptive, but it is
more efficient to design the harvesting system to exploit only specific energy sources
characteristic to the typical running environment. The harvesting system can also work
to minimize the unwanted effects the environment might have. Such would be for ex-
ample a vibration harvesting device, which by transforming the vibration into energy
would also dampen it.
In the scale applicable to be worn energy harvesting systems are mostly regarded as
suitable powering options for devices with low or ultralow energy consumption. For acommercial RF energy harvesting chip by Powercast they promise over 70% conversion
efficiency and an output of 50 mA at 4.2 V (12).
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4 Limitations and possibilities in technically en
hancedtextiles
Challenge with combining non-textile components with textiles is to minimize the deg-
radation of their functionality or totally retain them. With the versatility of textile prod-
ucts and technologies used to produce them, there are both limitations and possibilities
to be met.
4.1 Textilesandmanufacturing
Textiles can be classified by the way they are manufactured: knitted, woven and non-
woven. In addition to the combination of these three manufacturing techniques textiles
can also be modified and altered in numerous ways for instance laminated, coated, orplasma treated.
The raw material for textiles is fibres which may be natural or man-made. The prop-
erties of fibres have a significant influence on the properties of the final product. Fibres
are first spun into yarns before use in woven and knitted products. Fibres may also be
used as is, as in the case of non-woven textiles.
Advanced manufacturing technologies, such as 3D-weaving, also enable the manu-
facturing of final products instead of fabrics. Fabrics can be regarded both as a final
product or an interphase product for the sewing industry.
Textile industry processes may involve for example high temperatures, chemicals,
immersing and mechanical stress. These processes have been optimized to fulfil the
production speed and cost demands, which are usually quite high for low-profit prod-
ucts. These demands set quite a few expectations for the materials involved.
Material and manufacturing costs make up around 10 per cent of the selling price of
a common everyday garment. This creates cost-effective possibilities even with more
costly electronic pay-loads or slower production speeds needed to accommodate extra-
components. The added value to the end user also justifies higher price quoting.
4.2 Maintenanceand
environmental
issues
The maintenance of clothing textiles usually involves washing, be it water or chemical,
and minor repairs. With more advanced or technical textiles maintenance may not be as
trivial, involving special detergents or materials, as with taped seams in water-proof
jackets (13).
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With embedded technology the maintenance requires specialized knowledge and
might become re-seller only making end-user maintenance obsolete. This kind of ser-
vice model is common nowadays with for example newer cars, which are becoming
more heavily computerized and usually require brand specific service. It opens possi-
bilities for customer bonding and new business functions, but may also affect purchas-
ing behaviour (14).
Using modular or detachable components enables different maintenance tasks for
different parts. Thus the maintenance need not be uniform throughout the system mak-
ing up the enhanced textile. This way of thinking gives way to customization and using
same components in different collections, possibly lowering the requirements compo-
nent-wise and manufacturing of the components may be diversified.
People have become more aware of recycling, environmental thinking and responsi-
bility. This reflects to the manufacturing industry as well and customers are demanding
products that fulfil these new values. Brands nowadays have their own codes of conduct
and the product lifecycle has become part of the design process. Marketing a productwith environmental values may have a positive effect on consumers.
Waste Electrical and Electronic Equipment (WEEE), the English equivalent of Finn-
ish shk- ja elektroniikkaromu (SER), describes discarded electrical or electronic de-
vices. If the textile includes electrical or electronic components, it adds to the challenges
recycling the combination if the materials cannot be separated (15).
4.3 Physicaldimensions
The most common and largest variable of apparel products must be the physical dimen-sions. Variance between graded pattern sizes, according to the pattern, may be of sever-
al centimetres and affects usable surface area. With elastic materials the variance is non-
static. These variances need to be taken into account when using fixed size components,
physical wires and when the placement of components are critical to for example weight
distribution.
Regardless of evolving battery technologies, the batteries are still often the heaviest
part of electronic systems. Affecting the design of apparel or other textile products,
weight distribution, ergonomics and freedom of movement must be taken into account.
Optimizing the use of space available is crucial, both in design and components used.
The small surface area provided by clothes and accessories is a disadvantage with com-
ponents requiring maximum space available. With for example solar cells, the available
surface area is directly related to the power output. The aesthetic properties in consumer
products should also be noted.
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5 Currentandfuturepowersourcealternatives
Goals for current research are more efficient power generation and storing capacity,
aiming to bring down the total costs and elongated operating time. Using alternative
energy resources is still more costly and the energy density of batteries still need more
work. And even an ultra-high energy density battery has its downsides if it cannot be
recharged quickly.
5.1 Fuelcells
Fuel cells, like batteries, generate DC electrical energy utilizing electrochemical process.
Unlike batteries, though, fuel cells use external fuel to produce the output energy. They
will work continuously given adequate fuel and oxidizer supply. Using hydrogen and
oxygen fuel cells are a silent, environmental (producing only water and heat as by-
products), energy efficient power source. (16) Compared to batteries, fuel cells provide
high power density and long operation time (17).
Other fuels, including alcohols and carbon, may require higher working temperature
but may be used as low or non-pressurized, making it more safer a system. The down-
side of these kinds of fuel types is that they produce impurities, such as carbon dioxide.
Still direct methanol fuel cells (DMFC) are considered the most feasible portable fuel
cells (PFC) and power sources for small, portable devices (17).
Several companies have commercialized portable fuel cell power systems, aiming at
military force markets. One of them is German company, Smart Fuel Cell (SFC) Energy
AG. They have JENNY 600S, a battery recharging system weighing 1.6 kilograms and
has the dimensions of 183.6 x 74.4 x 252.3 mm. It uses replaceable liquid methanol fuel
cartridges, with 350 ml cartridge providing nominal capacity of 400 Wh. (18)
Micro fuel cells are an interesting and high profile research subject. Small, commer-
cially available fuel cell alternatives for batteries are scarce. There are only a few com-
panies providing commercial off-the-shelf (COTS) fuel cell solutions, running proprie-
tary power cells.
One of these, Taiwanese Antig, advertises a lightweight module aimed as a back-up
charger for portable devices. Titled A5 Blade this methanol burning power source
outputs 5 W at 5 V. With dimensions of 150 x 25 x 105 mm and 300 g it is the same
scale as a small PDA. (19)
Gradually more companies will start providing customizable fuel cell components
applicable to electricity dependent textile products. But even then building up a whole
supply and distribution network for fuel cell cartridges is challenging with battery satu-
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rated markets. Recharging more available secondary batteries from wall power sockets
is still more appealing and cheaper alternative to end-users.
5.2 Solarcells
Solar or photovoltaic cells convert energy of light into electricity. Singular solar cells
form a solar module, which is an encased stand-alone DC electricity providing system.
As with other electrical components, solar cells can be connect either in series or in par-
allel inside a module to gain favourable electrical output.
With weather being unpredictable, providing sustained solar energy may be some-
what challenging. The electricity gain can vary between different time frames and sea-
sons, from sunlight to twilight. Yearly electricity potential that could be gained with
immobile and optimally positioned solar modules is pictured in Figure 6.
Figure 6 - Photovoltaic Solar Electricity Potential in European Countries (20)
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Power density under bright sunlight can measure up to 100 mW/cm2. In a normal of-
fice illumination it comes down to 100 W/cm2. (21) With an energy reserve, such as a
battery, these power peaks can be equalized down to a constant level over a longer peri-
od of time.
Different materials used to manufacture solar cells have different properties and af-
fect the energy conversion efficiency. Semiconductor materials have been used to gain
most out of the cells, but these are rigid, heavy and relatively costly. And still they have
an efficiency of about 15 per cent. (7)
Dye-sensitized solar cells (DSSCs) are a promising candidate for next-generation
photovoltaic panels due to their low cost, easy fabrication processes and relatively high
efficiency. With technologies allowing solar cells to be produced on flexible substrates,
even on paper, solar cells are adaptable to be used in textile context (22).
5.3 Batteries
The working principle behind batteries is old, but material science and nanotechnology
have given a boost to manage with competing technologies. Lithium polymer batteries
(LBPs), commercialized in the 90s, are low weight and have both high power and high
energy density. The voltage of lithium cells, depending on used materials, varies be-
tween 1.5 and 4 V. (23)
Lithium polymer batteries are 20 % lighter than their predecessor lithium ion (li-ion)
batteries and have specific energy density in the range of 130-200 Wh/kg. LPBs can
also be shaped into almost any shape desired due to no need for a rigid metal casing.
This is one of the reasons why they are a popular power source in small portable devices.(24)
There are many possibilities that nanotechnology has brought into battery technolo-
gy. Structures that are lighter and have much larger surface-area can be manufactured,
allowing faster recharging and greater energy density. In addition to enhanced capacity
nanotechnology enables making the system more stable and long-lived. (25)
5.4 Supercapacitors
Supercapacitors differ from normal capacitors in that they have very high capacitance.
They have high power density, fast charge-discharge cycles, low heating and are stable
in the long run. (26) Capacitors have voltage limits and supercapacitors are confined to
2.5-2.7 V. Energy density with commercial carbon supercapacitors range from 1 to 5
Wh/kg (24).
Supercapacitors have gained the gap between capacitors and batteries, providing
higher power than batteries and higher energy density compared to normal capacitors.
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Researchers at the University of Texas at Austin succeeded in producing a supercapaci-
tor capable of storing the same amount of energy as a lead-acid battery (27).
Even with high energy density and small size, supercapacitors come packaged in
bulky enclosures. Using textile products as a substrate for electronic components is a
possibility which was exploited in a research at A.J. Drexel Nanotechnology Institute. A
fabric superconductor was contrived using screen printing and ink-jet printing. This
flexible and light-weight supercapacitor achieved properties comparable to conventional,
commercially available supercapacitors. (28)
6 Summary
Most of the breakthroughs in technologies involved in technically enhanced textiles are
not specifically solving problems characteristic to the combination of textiles and elec-
tronics. Battery technology, material science, textile machine technology, etc. are evolv-
ing on their own paths. Perhaps at some stage, when the smart textile industry becomes
more mature or commercially more attractive, this combinatory field will have its own
component and part providers from aforementioned branches. In the meantime, follow-
ing and combining interdisciplinary results is inevitable. The preliminary standardiza-
tion work, such as the report CEN/TR 16298 Textiles and textile products Smart tex-
tiles Definitions, categorisation, applications and standardization needs, gives com-
mon terms and criteria to categorizing the products. This benefits everyone from the
manufacturer to the end-user.
Comparison between different powering technologies is not trivial. The compromise
between charging autonomy and heavy components is challenging. The parameters of a
system under analysis define which power source, or combination of them, is the best
alternative. Some project may favour light weightiness and other dimension while other
operation time and life-cycle costs. This decision must be drawn into the design process
and adds to the more challenging design process of technically enhanced textiles.
Using energy from a storage unit, such as a battery, is with the current technology
still more convenient option compared to generating the energy on the go. The capacity
is in most cases longer and higher with batteries than what singular generators can gen-
erate. The biggest inconvenience is the bulk that negatively enhances the garments usa-
bility. A combination of a storage unit and a generator (a fuel cell for example) for re-
charging gives the benefits of both and lowers the impediments.
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7 Bibliography
1. Hnnikinen, Jaana. Electronic Intelligence Development for Wearable
Applications. Tampere : Tampere University of Technology, 2006. ISBN 952-15-1671-
2.
2. Dunne, Lucy E., Ashdown, Susan P. and Smith, Barry. Expanding GarmentFunctionality through Embedded Electronic Technology. 3, s.l. : College of Textiles,
North Carolina State University, Spring 2005, Journal of Textile and Apparel,
Technology and Management, Vol. 4.
3. Barfield, Woodrow and Caudell, Thomas, [ed.]. Fundamentals of wearablecomputers and augumented reality. s.l. : Routledge, 2001. ISBN 978-0-8058-2902-0.
4. Parvus Corporation. Zypad WL1100 Product Overview. Parvus Corporation Website. [Online] 22 November 2010. [Cited: 22 November 2010.]
http://www.parvus.com/product/overview.aspx?prod=ZypadWL1100.
5. Eurotech S.p.A. Wearable computer (WWPC). Eurotech Group Web site. [Online]04 10 2010. [Cited: 04 10 2010.] http://www.eurotech.com/en/innovation/wearable.
6. Banzi, Massimo, et al., et al. Lilypad Arduino. Arduino web site. [Online] 10 102010. [Cited: 10 10 2010.] http://www.arduino.cc/en/Main/ArduinoBoardLilyPad.
7. Kimberly, Patch and Smalley, Eric.Power Sources: Fuel Cells, Solar Cells andBatteries. Boston, MA, USA : Technology Research News, 2003. OCLC: 646716461.
8. Phillips, James R. CTS PiezoElectric Downloads. CTS Corporation Web site.[Online] 25 May 2000. [Cited: 04 07 2011.]
http://www.ctscorp.com/components/pzt/downloads/downloads.asp.
9. Awode, Mahendra R. Introduction to Electrochemistry. Mumbai, IND : GlobalMedia, 2010. OCLC 680626554.
10. Arya, S. N.Fundamentals of Magnetism and Electricity. Delhi,IND : Global Media,2009. OCLC:680624543.
11. Young, H. D. and Freedman, R. A.University Physics with Modern Physics. s.l. :Addison-Wesley Publishing Company, 2000. 0-201-70059-X.
12. Powercast Corporation. Powerharvester receiver P1110 Product Datasheet.Powercast Corp. website. [Online] 2010. [Cited: 21 September 2011.]
http://www.powercastco.com/PDF/P1110-datasheet.pdf.
13. W. L. Gore & Associates, Inc. Repair Information. Gore-Tex Web site. [Online]2011. [Cited: 22.11.2011] http://www.gore-tex.com/remote/Satellite/content/care-
center/repair-information.
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8/3/2019 Powering Options in Technically Enhanced Textiles
21/22
16
14. Liljander, Veronica and Strandvik, Tore. The Nature of Customer Relationshipsin Services. [book auth.] Teresa A. Swartz, David A. Bowen and Stephen W. Brown.
Advances in Services Marketing & Management: Research & Practice v. 4. s.l. : JAI
Press Inc., 1995.
15. Khler, Andreas R., Hilty, Lorenz M. and Bakker, Conny.Prospective Impactsof Electronic Textiles on Recycling and Disposal. 4, s.l. : Journal of Industrial Ecology,
Vol. 15, pp. 496-511.
16. Hoogers, Gregor, [ed.].Fuel Cell Technology Handbook. s.l. : CRC Press, 2003.ISBN: 978-1-4200-4155-2.
17. Colpan, C. O., Dincer, I. and Hamdullahpur, F. Portable Fuel Cells -Fundamentals, Technologies and Applications. [ed.] A. Pramuanjaroenkij, L. Vasiliev
and S. Kaka.Mini-Micro Fuel Cells. s.l. : Springer Netherlands, 2008.
18. AGB SFC Energy, Inc.JENNY 600S Portable Fuel Cell Power System. [Document]
19. Antig. Antig Fuel Cell Systems - A5 "Blade". Antig Company Web site. [Online][Cited: 29 November 2011.] http://www.antig.com/products/products_systems.htm#A5.
20. ri, Marcel, et al., et al.Potential of solar electricity generation in the EuropeanUnion member states and candidate countries. 10, 2007, Solar Energy, Vol. 81.
21. Rida, Amin, Yang, Li and Tentzeris, Manos M.RFID-Enabled Sensor Designand Applications. s.l. : Artech House, 2010. ISBN: 1607839814.
22. Barr, M. C., et al., et al.Direct Monolithic Integration of Organic PhotovoltaicCircuits on Unmodified Paper. 31, 16 August 2011, Advanced Materials, Vol. 23, pp.
3500-3505.
23. Jacobi, W.Battery Technology Book, 2nd Ed. [ed.] H. A. Kiehne. s.l. : CRC Press,2003. ISBN: 978-0-203-91185-3.
24. Chin, Chee Keen. Extending the endurance, missions and capabilities of mostUAVs using advanced flexible/ridged solar cells and new high power density batteries
technology. California : Naval Postgraduate school, 2011.
25. Zheng, Guangyuan, et al., et al.Hollow Carbon Nanofiber-Encapsulated SulfurCathodes for High Specific Capacity Rechargeable Lithium Batteries. 11, Stanford,
California : ACS Publications, 2011, Nano Letters, pp. 4462-4467.
26. Pan, Hui, Li, Jianyi and Feng, Yuan.Carbon Nanotubes for Supercapacitor. 3,s.l. : Springer New York, 01 March 2010, Nanoscale Research Letters, Vol. 5, pp. 654-
668. Issn: 1931-7573.
27. Zhu, Yanwu, et al., et al.Carbon-Based Supercapacitors Produced by Activationof Graphene. 12 May 2011, Sciencexpress.
-
8/3/2019 Powering Options in Technically Enhanced Textiles
22/22
17
28. Jost, Kristy, et al., et al. Fabrics Capable of Capacitive Energy Storage. 2011.15th Annual International Symposium on Wearable Computers. pp. 117-118. ISSN:
1550-4816.