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Industrial Processing Equipment Blog

The Industrial Processing Equipment Blog is the place for conversation and discussion about fluid and gas handling equipment; thermal processing; solids handling; and filtration, separation and recycling. Here, you'll find everything from application ideas, to news and industry trends, to hot topics and cutting edge innovations.

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4 comments

What's Your Energy Future Look Like?

Posted October 14, 2011 7:54 AM

Some companies are recycling their exhaust air to make their own electricity. Others are installing wind turbines to supply energy to the plant. Still others are optimizing their drive systems to improve efficiency. Could you use existing mechanical systems to harvest waste wind or maybe upgrade your motors to high-performance models? How is your plant making the move to a more sustainable future?

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Guru

Join Date: Nov 2009
Location: Izmir, Turkey
Posts: 2162
Good Answers: 31
#1

Re: What's Your Energy Future Look Like?

10/14/2011 1:22 PM

Some parties are blowing smoke to try to come up with a post also.

The last plant I worked at (a steel mill) the section I managed consumed 55 to 75 mW of power - the overall complex consumption was in the 350 mW range.

We used waste heat recovery - good business.

Did we install wind turbines? No - That is a lot of wind turbines that are intermittent producers of power.

WTF is 'waste wind'? High-performance motors? Like Ferrari maybe?

The poster really should try to write posts where they have some minimal amount of knowledge.

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Power-User

Join Date: Sep 2010
Location: Orinda, CA
Posts: 255
Good Answers: 14
#2

Re: What's Your Energy Future Look Like?

10/15/2011 12:03 PM

"Waste wind" I suppose means curtailed wind: the energy that goes to waste when wind power can't be used. In 2010, curtailed wind amounted to 25 TWh of energy wasted. Curtailment of wind is to be expected because wind is most available at night, when there is lots of spinning reserve and power is cheap. In the spring, when there is lots of hydro, wind goes to waste. Were it not for the compulsory purchase of expensive wind power, the curtailed wind figure would be much higher. Given the fact that most wind power is at night, it is hard to see how wind could ever be a serious unsubsidized player in the power market. Better to use this wasted wind to do some other job where the intermittent energy could be stored in flywheels, like grinding things, pumping things, or cracking CO2 by shear electrolysis.

About 2/3 of the energy in the fuel for thermal power plants gets wasted as latent heat in vapor discharged to the atmosphere, which is a serious waste of fresh water and of energy. Power harvesting from turbine exhaust steam looks like a big opportunity, especially if wet cooling could be minimized by making the steam lose enthalpy doing work. See http://www.freepatentsonline.com/7987677.pdf

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Guru

Join Date: Nov 2009
Location: Izmir, Turkey
Posts: 2162
Good Answers: 31
#3
In reply to #2

Re: What's Your Energy Future Look Like?

10/15/2011 12:18 PM

In this case 'waste wind' seems to be more like some fruitcake green phrase of the moment.

Very few processes are of the type you turn on only when there is excess power available. To justify the investment it normally takes a 7/24 business - ammonia was a topic a couple of years back for this point but it was a red herring.

Any new power plant surely has heat recovery where they bring the exhaust temperature down close to the acid dew point - you are going to improve on that?

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Active Contributor

Join Date: Oct 2011
Posts: 11
#4

Re: What's Your Energy Future Look Like?

10/31/2011 1:43 AM

due to the standardization the energy future look bright and it often need to the best practice throgh the standards,iso standards,din standards.

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