from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. (of a gas) Above its critical temperature and critical pressure
- adj. Having a mass sufficient to sustain a chain reaction
- adj. Above the speed of sound
- adj. Above some other critical value or range
from The Century Dictionary and Cyclopedia
- Excessively critical; hypercritical.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (especially of fissionable material) able to sustain a chain reaction in such a manner that the rate of reaction increases
Sorry, no etymologies found.
A so-called supercritical plant operates at sufficiently high pressures and temperatures (between 1000 and 1075 degrees Fahrenheit) such that the water and steam become indistinguishable (the critical point of a liquid), allowing efficiency rates to reach 42 percent.
New rules mean that about one fifth of India's new coal plants will be among the efficient (so-called supercritical) plants that are standard fare in much of the rest of the world.
Even worse, the World Bank classifies these coal plants as "low carbon" financing projects if they are the so-called supercritical type with marginally better CO2 emissions rates.
When CO2 is captured and prepared for storage, it enters what scientists call a supercritical phase: it behaves both like a liquid and a gas.
In both phases, the cellulosic material is treated by water at a pressure and temperature that is so high that the water is neither steam nor an ordinary liquid but in a form known as "supercritical."
In both phases, the cellulosic material is treated by water at a pressure and temperature that is so high that the water is neither steam or an ordinary liquid but in a form known as "supercritical."
When the water is in the so-called supercritical phase, the company says, its pH level can be adjusted to turn it into an acid.
Renmatix says its industrial-scale process breaks down cellulose through something called "supercritical hydrolysis," which uses water at high temperatures and pressures to quickly solubilize cellulose from sources such as wood.
Medupi is designed to operate at higher steam pressures and temperatures (termed supercritical) which enables it to achieve a higher efficiency than Eskom's existing coal-fired [plants].
The technology, referred to as a supercritical binary geothermal cycle, is estimated to be more efficient than traditional geothermal binary systems, allowing lower-temperature geothermal resources to be used for power generation.