- Created by: KirstieTiny
- Created on: 30-04-19 12:49
- new technologies used to produce more environmentally friendly and sustainable designs.
- e.g public buses introduced in china have electric engins powered by super capacitors. thiese use one tenth of the energy of a diesal-powered bus.
- e.g bioplastics. which will reduce the need to drill for oil. disposable carrier bags are being designed to be biodegradable, meaning less will be sent to landfill sites.
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- makes product better in some way.
- new material or manufacturing technologies often result in the improvement of products or the development of new ones.
- e.g smaet materials. like quantum tunnelling composite (QTC). this is a flexable polymer that become a conductor when squeezed, used for membrane switches in phones.
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- new technologies can be created doesnt mean they should be. ethical implications should be considered.
- nanotechnology could have big imact on healthcare but some think that we should not be placing artificial components into the human body.
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non renewable energy sources are sources that will ventually run out. the main examples are fossil fuels and nuclear fuel.
- formed from the remains of dead organisms over a very long period of time
- burnt to create steam, which turns turbines and hen drives a generator that produce electricity.
- burning fossil fuels releases carbon dioxide into the atmosphere, which can contribute to globa warming
- they will eventually run out.
- nuclear reactor creates steam to turn turbines and drive a motor.
- nuclear fission controls the heat of the reactor.
- making great use of fossil fuels means that there is less need to burn fssil fuels
- although accidents are rare they can result in radioactive material being release into the enviromemnt, which can cause health problems for plant and animals in the surrondings
- stricted procedues for disposal
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- use solar energy by collecting and converting light form the sun into electric current.
- will not run out for billions of years, so endless supply.
- not waste products or greenhouse gases emitted.
- produce less electricity when there is less sunlight, they produce not electricity at night.
- installation and maintenance cast can be hig.
- turbines can drive the generators, these are turned by the wind.
- the amount of electricity depends on the amount and strength of the wind.
- no waste products.
- wind turbines are noisy and impact the look of the environment.
- water is held in a reservoir and when it is realesed it turnes a turbine which will then generate electricity.
- floods large areas of land and destroys habbitats
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Transferring and storing energy
- once it has been genrrated it must be transferred to its place of use.
- transmitted using the national grid.
- transmitted through cables at high voltage to minimise engery loss
- high voltages are very dangerous and are kept up high to keep out of reach from animals/humans.
- step up transformers are used to increase the voltage and Step down transformers are used to reduce the voltage and lower the levels ready for use in home.
- sometimes energy will not be used straightaway and must therefore be stored unitl it is needed
- batteries, super capacitors and fuel cells are all methods of achieving this.
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The 6 Rs
- Reduce - how can the amount of materials be used in the product be reduced? Is the product itself necessary?
- Rethink - How can the product be changed so that it is less harmful for the environment?can a better way to solve the problem be found?
- Refuse - should the product be produced if it is not sustainably deigned? is the packaging necessary or can it be removed?
- Recycle - is it made using recycled materials? Can the materials be recylced once the product is no longer useful?
- Reuse - could the product be used in a idfferent way once its current use has expired? could it be disassembled so that its materials and componets could be reused in other proucts?
- Repair - is it easy to repair? Are replacement comonents readily available in case of failure?
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- movement that works to help people in developing countries get a fair deal for the products that they produce.
- producers are made an agreed minimum rate for amny products, this gets paid even if global prices fall.
- they also recieve fairtrade Premiun payment that they can use to invest in areas such as local education and healthcare.
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