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The Light Green Machine Institute
Weekly
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Check out Nip Impressions weekly
|  | Nip Impressions� is Paperitalo Publications' flagship publication. Published every Thursday afternoon (US Eastern Time), Nip Impressions� is eagerly read by pulp and paper professionals around the world and is ranked the No. 1 website in the industry by Alexa.
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15 May 2013:
Concrete vs. Steel
|  As we have stated previously, we are going to be taking the ideas developed in this column over the last couple of years and developing them into design practices. This is how it works. We will provide the basic narrative here for one design practice each week. We will keep it open for comments for one month. After that, we will finish it in formal form and offer it for sale at a modest price. Here is where you come in. If you make a substantive contribution to a standard, the organization for which you work will be granted a pro bono license to use that standard with its current issue number for as long as you like. We have had good response so far! Contribute, please.
This week's:
Concrete vs. Steel (LGM 2013.019.01
when issued)
Reference:
When you can't think of anything else to lighten, think of substitution. An example: twenty-five years ago, interstate overpasses were competitively bid in steel and precast concrete designs. Today, precast concrete has taken over this sector of construction. Objective:
To use concrete as an alternative to steel, as it may be less expensive.
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As always, your comments will be appreciated.
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Think light!
Brian Brogdon, Ph.D.
Executive Director
or
Jim Thompson
Founder
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LGMI FEEDBACK
Regarding Heat Transfer Fluids
Converting PM dryers to HTF heating is not really a new idea, but certainly worth considering, especially if combined with steel dryers replacing cast iron dryers.
From a property protection view, there is a significant fire hazard increase at the machine. This increase can be addressed by providing curbs & drains to contain spills, controls to stop the HTF systems upon leakage and additional automatic sprinkler protection.
Fire protection of the HTF heating and supply system is also needed while steam heating needs none.
Many paper machines now have in-line HTF heated calendars, so there is some experience with the increased fire hazard. In 1999 a mill in Muskegon MI had a HTF calendar fire that was moderately well contained. I believe the fire resulted from a broken rotary joint. About the same time a mill in Maine had some experience with HTF fire on paper machine.
Send us your comments by emailing Brian Brogdon
or Jim Thompson!
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Disclaimer
LGMI Weekly Ideas are presented for your consideration and inspiration only. It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing. Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.
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