Volume power density

The frequency effects are studied in the cylindrical geometry (R = 0.08 m, L = 0.027 m) at a constant power of 25 W, which corresponds to a volume power density 46 mW cm . The pressure is 120 mTorr with 45% SiHa and 55% H2. It is found that the RF voltage at this power scales with the frequency as Vrfv p = C, with C a constant. Because the induced displacement current increases with the... 

The active surface to volume ratio of the tubular arrangements previously described is approximately 1 cm2/l cm3. This parameter could be increased with corresponding increases in both volume power density and area power density. New concepts for solid state electrochemical reactors have been proposed based on more or less planar cell structures which can be integrated to make blocks. 

The practical usefulness of these electrochemical converters is partly a function of their volume power densities. This parameter is composed of the oxygen ion transfer area per unit reactor 2 3... 

The mass or volume power densities are quite similar for ... 

At a sufficiently low volume power density, every biomaterial is linear. At a sufficiently high volume power density, every biomaterial is nonlinear. Many applications make use of the nonlinear region, where the principle of superposition no longer is valid. The nonlinearity may be a property of the biomaterial, or of the electrode/electroljrtic systems used. 

Power density (or volume power density or volume specific power) is the amount of power (time rate of energy transfer) per unit volume. 

In the case of nuclear power plants, reactor sizes kept increasing to take advantage of the economy of size, until the size reached what were deemed physical manufacturing, construction, or shipping limits. Even then, improvements continued to be made in the heat removal capabilities, resulting in higher volume power densities from the same size plants. 

Improvement of sealless tubular cells. To improve the volume power density, flatten tube type or delta type designs have been investigated by Siemens... 

For a fuel ceU stack, mass- and volume-specific power densities are more useful parameters. The mass power density is the ratio of power to stack weight, measured in kilowatts per kilogram. Clearly, light-weight stack materials are required to increase the mass power density of a stack. Volume power density is the ratio of power to stack volume, measured in kilowatts per liter or kilowatts per cubic meter. Thus, for increasing the volume power density, one requires to reduce the stack size and simplify the stack system. 

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