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The Official Eleanor Roosevelt (And Anything Else Non-Topical) Thread
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<p>[quote user="Juniatha"]<span lang="EN-US" style="color:#999999;font-size:10pt;"><span style="font-family:Times New Roman;"> </span></span></p> <p class="MsoNormal"><span lang="EN-US" style="color:#422163;font-size:10pt;"><span style="font-family:Times New Roman;">As concerns best transmission for turbine power in vehicle application I think it’s the electric :<span style="mso-spacerun:yes;"> </span>high transmission efficiency , widely variable torque / speed range while primary engine runs at suitably tuned rpm . </span></span></p> <p class="MsoNormal"><span style="font-family:Times New Roman;"><span lang="EN-US" style="color:#422163;font-size:10pt;">On the </span><span lang="EN-US" style="color:#422163;font-size:10pt;">Paris</span><span lang="EN-US" style="color:#422163;font-size:10pt;"> Salon 2010 Jaguar presented a super sports car CX75 with a small gas turbine to load batteries and comparatively very powerful electric traction motors .<span style="mso-spacerun:yes;"> </span>The idea is to have the gas turbine running at relatively constant output and rpm – where it’s most economic – and use batteries as energy storage for powerful electric motors .<span style="mso-spacerun:yes;"> </span>Drawback of course is :<span style="mso-spacerun:yes;"> </span>you can only use this superior motor power for a very limited time before the batteries – having to be the lightest possible of necessarily limited capacity – are being drained .<span style="mso-spacerun:yes;"> </span></span></span>[/quote]</p> <p class="MsoNormal"> </p> <p class="MsoNormal"> </p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">Juniatha,</span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">In your description of a turbine-battery-electric car, you mention that the drawback would be that it would quickly run out of power because of the battery storage limit.<span style="mso-spacerun: yes;"> </span>But wouldn’t the turbine engine produce enough power to sustain the battery charge? <span style="mso-spacerun: yes;"> </span>My impression is that the battery is just to smooth out the peaks and valleys of power demand while driving, and thus allow the turbine to run at a constant speed and load in maintaining the battery charge.<span style="mso-spacerun: yes;"> </span></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">Considering this basic hybrid concept of engine-generator-battery-electric motor, with the inherent advantage of the motor running at a constant, optimal power output: What would be the advantage of a gas turbine over a gasoline or diesel piston engine as the prime mover?<span style="mso-spacerun: yes;"> </span></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">I have heard a generalized statement that diesel engines inherently are capable of being made more efficient almost indefinitely, although at higher a cost of manufacturing.<span style="mso-spacerun: yes;"> </span>And I also understand that this diesel potential is being explored in Europe, whereas in the U.S., there is relatively little interest in developing the potential of diesels.<span style="mso-spacerun: yes;"> </span>Assuming that is true, why is that?<span style="mso-spacerun: yes;"> </span></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p class="MsoNormal"><span style="font-size: 12pt; mso-ansi-language: EN-US; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">I have heard two different explanations.<span style="mso-spacerun: yes;"> </span>One is that U.S. emissions laws preclude this exploitation of the diesel.<span style="mso-spacerun: yes;"> </span>The other is that the U.S. consumer market rejects diesels because they perceive them to be noisy, clunky, smoky, and old fashioned.<span style="mso-spacerun: yes;"> </span>If the latter is the reason, I am surprised that that perception cannot be overcome.<span style="mso-spacerun: yes;"> </span></span></span></span></p>
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