In some instances, microCHP systems have attempted to use waste heat for residential space heating.
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The remaining two-third of the energy contained in the fuel is lost as waste heat.
And a marketplace void now exists to recapture waste heat and to apply it to create electricity.
The other 65 percent is lost forever in the form of waste heat discharged into the environment.
Waste heat from one appliance like the fridge might be captured and fed into an oven or dishwasher.
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Broad Group, a Chinese maker of air conditioners, taps the waste heat from buildings to power its machines.
One of the main challenges faced by LED lighting manufacturers is dealing with waste heat produced by the bulb.
That means that low-temperature waste heat can be used to produce high-quality chemical energy hydrogen for the first time.
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The only emissions from the fuel cell itself are water and waste heat, which can be captured and put to use.
The difference is merely whether the same quantity of waste heat energy is thrown away at the source or in the vehicle.
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At Kalunborg waste heat from industry is used to heat nearby homes.
The heat source can be solar energy, warm water or waste heat.
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The advantage of solid oxide fuel cells running so hot is that all that waste heat can potentially be put to good use.
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But the deeper lines are trickier: space is so tight that there is nowhere for waste heat to go, which makes traditional air-conditioning impossible.
Combined heat and power (CHP) systems have long been used to generate electricity and use the waste heat for other purposes, especially for industrial processes.
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The typical coal-fired power plant, for example, loses over half the input energy as waste heat before the first electron zips out of the facility.
Interestingly, the technology exists to modify that waste heat a tool that could gain ever-increasing credence if natural gas and coal prices turn volatile.
He said the technology could be used to capture waste heat from a conventional 500-megawatt thermal power plant to boost electricity out by 200 megawatts.
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There is some waste heat caused by inefficiencies within the LED, however, the net result is a big gain in the percentage of electricity converted to visible light.
But this extra information must also be discarded when the demon looks at the next nucleus a process, Dr Lloyd has shown, that results in even more waste heat.
This requires proper upfront planning, but if done right, one can end up with a model like Denmark, which essentially recycles 50% of its waste heat for other uses.
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The plant cannot use palm oil or oils fit for human consumption and efforts must be made to recover waste heat and enable it to be used by nearby properties.
The waste heat is converted into cooling capacity, and the small heat surplus is dumped into aquifers 300 m below ground level, where it is stored and recovered in winter.
Like the first book, the new book surveys the hot spots in the clean tech space, which include net-zero energy green buildings, advanced waste heat technologies for combined heat and power and several other technologies.
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The collector also promises to do more with sunlight once it's trapped: since the microchannels should absorb more than half of the waste heat, their hot water byproduct can either be filtered into drinkable water or converted into air conditioning.
Arun Majumdar, the former director of ARPA-E now at Google, told me in 2008 that The U.S. consumes about 100 quads of energy a year, he said and 55 to 60 of those quads gets burned up in waste heat.
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Cooler still is the method the arm deals with waste heat and steam: just like a regular arm, it's allowed to filter up through a permeable skin, producing "sweat" -- the same amount of perspiration you'd get on a warm summer day, according to the team.
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Furthermore, by capturing and reusing energy that would otherwise be lost in waste-heat, CHP improves overall efficiency by double digits.
IMechE says the simplicity and elegance of the Highview process is appealing, especially as it addresses not just the problem of storage but also the separate problem of waste industrial heat.
The proof is in the pudding on this point: every dollar of public-sector funds received by these projects was being matched by nearly four dollars in private-sector investment toward buying and installing the systems that generate on-site electricity and use waste-heat created during generation.
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