<html><body><div style="color:#000; background-color:#fff; font-family:bookman old style, new york, times, serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_1_1422566128731_2759"><span>Ron,</span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2759"><span><br></span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span id="yui_3_16_0_1_1422566128731_2760">Quite a few years ago when I was at HCI, we experimented with hydrogen thermo-fluidic devices using metal hydrides</span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span id="yui_3_16_0_1_1422566128731_2764">as sorption compressors (even in three-bed cascade systems). </span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span><br></span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span id="yui_3_16_0_1_1422566128731_2841">The temperature available from cookstoves is high enough to operate most hydride systems.</span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span id="yui_3_16_0_1_1422566128731_2982">Here are a few sources of the technology I am referring to:</span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761"><span><br></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2896"><i style="mso-bidi-font-style:normal" class="" id="yui_3_16_0_1_1422566128731_3061"><span style="font-family:"Times New Roman";color:#262626;mso-bidi-font-weight:bold" class="" id="yui_3_16_0_1_1422566128731_3060">Metal
Hydride Fluidic Artificial Muscle Actuation System<o:p class="" style=""></o:p></span></i></div><div class="" style="" id="yui_3_16_0_1_1422566128731_2897"><span style="font-family:"Times New Roman";color:#262626" class="" id="yui_3_16_0_1_1422566128731_3062"> By
Alexandra Vanderhoff<o:p class="" style=""></o:p></span></div><div class="" style="" id="yui_3_16_0_1_1422566128731_2898"><span style="font-family:"Times New Roman";color:#262626" class=""><o:p class="" style=""> </o:p></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2901"><i style="mso-bidi-font-style:normal" class="" id="yui_3_16_0_1_1422566128731_2900"><span style="font-family:"Times New Roman";mso-bidi-font-weight:bold" class="" id="yui_3_16_0_1_1422566128731_2899">Thermodynamic
Properties, Hysteresis Behavior and<o:p class="" style=""></o:p></span></i></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2904"><i style="mso-bidi-font-style:normal" class="" id="yui_3_16_0_1_1422566128731_2903"><span style="font-family:"Times New Roman";mso-bidi-font-weight:bold" class="" id="yui_3_16_0_1_1422566128731_2902">Stress-Strain
Analysis of MgH2 Thin Films, Studied over a Wide Temperature Range<o:p class="" style=""></o:p></span></i></div><div class="" style="" id="yui_3_16_0_1_1422566128731_2983"><span style="font-family:"Times New Roman";mso-bidi-font-weight:bold" class="" id="yui_3_16_0_1_1422566128731_3120">Yevheniy Pivak, Herman Schreuders, and Bernard Da<o:p class="" style=""></o:p></span></div><div class="" style="" id="yui_3_16_0_1_1422566128731_2994"><span style="font-family:"Times New Roman"" class="" id="yui_3_16_0_1_1422566128731_3119"><a href="http://www.mdpi.com/journal/crystals" class="" style="" id="yui_3_16_0_1_1422566128731_3118">www.mdpi.com/journal/crystals</a><o:p class="" style=""></o:p></span></div><div class="" style="" id="yui_3_16_0_1_1422566128731_2984"><span style="font-family:"Times New Roman"" class=""><o:p class="" style=""> </o:p></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2986"><span style="font-family:"Times New Roman"" class="" id="yui_3_16_0_1_1422566128731_2985">Reilly, J.J.;
Wiswall, R.H. The reaction of hydrogen with alloys of magnesium and nickel and
the formation of Mg2NiH4. <i class="" style="">Inorg. Chem. </i><span style="mso-bidi-font-weight:bold" class="">1968</span>, <i class="" style="">7</i>, 2254–2256.<o:p class="" style=""></o:p></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2987"><span style="font-family:"Times New Roman"" class=""><o:p class="" style=""> </o:p></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2990"><span style="font-family:"Times New Roman";color:#262626" class="" id="yui_3_16_0_1_1422566128731_2989">Micro
Energy Conversion Devices: <span style="mso-font-kerning:.5pt" class="" id="yui_3_16_0_1_1422566128731_2988"><a href="http://link.springer.com/search?facet-author=%22Luc+G.+Fr%C3%A9chette%22" class="" style=""><span style="color:#262626;mso-font-kerning:0pt;text-decoration:none;text-underline:none" class="">Luc G. Fréchette</span></a>,,</span></span><span style="font-family:"Times New Roman"" class="">
<o:p class="" style=""></o:p></span></div><div dir="ltr" id="yui_3_16_0_1_1422566128731_2761">
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<!--EndFragment--></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2993"><span style="font-family:"Times New Roman"" class="" id="yui_3_16_0_1_1422566128731_2992"><a href="http://link.springer.com/book/10.1007/978-0-387-48998-8" class="" style="" id="yui_3_16_0_1_1422566128731_3117"><span style="color:#262626;text-decoration:none;text-underline:none" class="" id="yui_3_16_0_1_1422566128731_3116">Encyclopedia of
Microfluidics and Nanofluidics</span></a><span style="color:#262626" class="" id="yui_3_16_0_1_1422566128731_2991"> 2008, pp
1119-1127 (this one includes heat engine details)<o:p class="" style=""></o:p></span></span></div><div class="" style="mso-pagination:none;mso-layout-grid-align:none;text-autospace:none" id="yui_3_16_0_1_1422566128731_2993" dir="ltr"><span style="font-family:"Times New Roman"" class="" id="yui_3_16_0_1_1422566128731_3115"><span style="color:#262626" class="" id="yui_3_16_0_1_1422566128731_3114">Greg</span></span></div><br> <div style="font-family: bookman old style, new york, times, serif; font-size: 16px;" id="yui_3_16_0_1_1422566128731_3066"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1422566128731_3065"> <div dir="ltr" id="yui_3_16_0_1_1422566128731_3064"> <hr size="1"> <font size="2" face="Arial" id="yui_3_16_0_1_1422566128731_3063"> <b id="yui_3_16_0_1_1422566128731_3113"><span style="font-weight:bold;" id="yui_3_16_0_1_1422566128731_3112">From:</span></b> Ronal W. Larson <rongretlarson@comcast.net><br> <b><span style="font-weight: bold;">To:</span></b> Discussion of biomass <stoves@lists.bioenergylists.org>; dyoung@pobox.com <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, January 29, 2015 12:51 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Stoves] thermo-mechanical stove automation?<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1422566128731_3067"><br>David, cc list<br clear="none"><br clear="none"> Per main question - No I doubt very much that anyone has done any experimentation on “thermo-mechanical actuation”. I don’t ever recall the subject coming up in our twenty (as Alex noted) years of talking charcoal-making stoves. As you note, it could well make sense for TLUDs. The most likely candidate would have been Philips - whose stove went under extensive development, but was unfortunately dropped. We hear rumors they may pick it up again. They are receiving valuable PR, and their design is in production by another group, and they may see a way to further their previous (and wonderful) support. I hope this message can get to them. Thanks for their past work.<br clear="none"><br clear="none"> The key variable would probably be to change the ratio of primary and secondary air. The areas (not air) needed are about equal. But tweaking might pay off, especially towards the end of a run.<br clear="none"><br clear="none"> Might want also to change a fan air flow to match optimum temperature after a rapid first T-rise to boiling.<br clear="none"><br clear="none"> Might want to completely close off all air supplies at the end of a batch.<br clear="none"><br clear="none"> There are some larger industrial TLUD systems we hear about, where this could/might make economic sense.<br clear="none"><br clear="none"> TLUDs are gaining a little every year. Thanks for bringing the topic up. <br clear="none"><br clear="none">Ron<br clear="none"><br clear="none"><br clear="none"><br clear="none">As noted recently by Alex English, <br clear="none">On Jan 28, 2015, at 6:02 PM, David Young <<a shape="rect" ymailto="mailto:dyoung@pobox.com" href="mailto:dyoung@pobox.com">dyoung@pobox.com</a>> wrote:<br clear="none"><br clear="none">> On Wed, Jan 28, 2015 at 05:52:12PM -0600, David Young wrote:<br clear="none">>> Has anybody looked at thermo-mechanical actuation of biomass stoves,<br clear="none">>> especially TLUDs? I.e., using the contraction/expansion of metals due<br clear="none">>> to the heating/cooling of the stove to adjust air supplies, adapt to<br clear="none">>> combustion conditions and stages, et cetera?<br clear="none">> <br clear="none">> Someone asked privately what I meant, so I will clarify.<br clear="none">> <br clear="none">> By thermo-mechanical actuation, I mean using a material's expansion,<br clear="none">> contraction, or change of phase to transform heat to a motion that<br clear="none">> performs a control function. Examples of such actuators are bimetallic<br clear="none">> strips, wax motors, and nitinol wire.<br clear="none">> <br clear="none">> (I may be abusing the terms "thermo-mechanical" and "actuation"!)<br clear="none">> <br clear="none">> Dave<br clear="none">> <br clear="none">> -- <br clear="none">> David Young<br clear="none">> <a shape="rect" ymailto="mailto:dyoung@pobox.com" href="mailto:dyoung@pobox.com">dyoung@pobox.com</a> Urbana, IL (217) 721-9981<br clear="none">> <br clear="none">> _______________________________________________<br clear="none">> Stoves mailing list<br clear="none">> <br clear="none">> to Send a Message to the list, use the email address<br clear="none">> <a shape="rect" ymailto="mailto:stoves@lists.bioenergylists.org" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br clear="none">> <br clear="none">> to UNSUBSCRIBE or Change your List Settings use the web page<br clear="none">> <a shape="rect" href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br clear="none">> <br clear="none">> for more Biomass Cooking Stoves, News and Information see our web site:<br clear="none">> <a shape="rect" href="http://stoves.bioenergylists.org/" target="_blank">http://stoves.bioenergylists.org/</a><div class="qtdSeparateBR"><br><br></div><div class="yqt9531739607" id="yqtfd38762"><br clear="none">> <br clear="none"><br clear="none"><br clear="none">_______________________________________________<br clear="none">Stoves mailing list<br clear="none"><br clear="none">to Send a Message to the list, use the email address<br clear="none"><a shape="rect" ymailto="mailto:stoves@lists.bioenergylists.org" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br clear="none"><br clear="none">to UNSUBSCRIBE or Change your List Settings use the web page<br clear="none"><a shape="rect" href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br clear="none"><br clear="none">for more Biomass Cooking Stoves, News and Information see our web site:<br clear="none"><a shape="rect" href="http://stoves.bioenergylists.org/" target="_blank">http://stoves.bioenergylists.org/</a><br clear="none"></div><br><br></div> </div> </div> </div></body></html>