Capacitors for cooling / Tajmar effect / Diamond and plasma

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DeltaV
Posts: 2245
Joined: Mon Oct 12, 2009 5:05 am

Capacitors for cooling / Tajmar effect / Diamond and plasma

Post by DeltaV »

"Predicted cooling powers for multilayer capacitors based on various electrocaloric and electrode materials"
http://scitation.aip.org/getabs/servlet ... yes&ref=no
We argue that the multilayer capacitor (MLC) geometry is ideal for electrocaloric cooling. Thermal modeling predicts that a commercially available MLC, which serendipitously shows electrocaloric effects, could constitute the heart of an idealized heat pump delivering a continuous cooling power of 22.5 W kg−1. This figure could be increased via materials optimization to ~2875 W kg−1, such that an MLC array whose sheet area is just ~0.56 m2 would deliver the ~20 kW cooling power of typical air-cooled chillers for air-conditioning at residential and commercial sites. Expensive materials are not required, and performance could be further enhanced via geometrical improvements.
"Can the Tajmar effect be explained using a modification of inertia?"
http://www.iop.org/EJ/abstract/-ffissn= ... 89/1/19001
The model predicts that the sudden acceleration of the nearby ring causes a slight increase in the inertial mass of the gyroscope, and, to conserve momentum in the reference frame of the spinning Earth, the gyroscope rotates clockwise with an acceleration ratio of 1.78±0.25×10−8 in agreement with the observed ratio. However, this model does not explain the parity violation seen in some of the gyroscope data. To test these ideas the Tajmar experiment (setup B) could be exactly reproduced in the Southern Hemisphere, since the model predicts that the anomalous acceleration should then be anticlockwise.
"Interactions of diamond surfaces with fusion relevant plasmas"
http://www.iop.org/EJ/abstract/-ffissn= ... 138/014013
The outstanding thermal properties of diamond and its low reactivity towards hydrogen may make it an attractive plasma-facing material for fusion and calls for a proper evaluation of its behaviour under exposure to fusion-relevant plasma conditions. Micro and nanocrystalline diamond layers, deposited on Mo and Si substrates by hot filament chemical vapour deposition (CVD), have been exposed both in tokamaks and in linear plasma devices to measure the erosion rate of diamond and study the modification of the surface properties induced by particle bombardment. Experiments in Pilot-PSI and PISCES-B have shown that the sputtering yield of diamond (both physical and chemical) was a factor of 2 lower than that of graphite. Exposure to detached plasma conditions in the DIII-D tokamak have evidenced a strong resistance of diamond against erosion under those conditions.

jmc
Posts: 427
Joined: Fri Aug 31, 2007 9:16 am
Location: Ireland

Post by jmc »

Greg De Temmerman used to work a few offices away from me. I remember an experiment on our machine where diamond was shoved straight into the MAST plasma using a reciprocating probe.

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