Sentences with phrase «radiative efficiency»

Secondly, objects radiate proportion to the fourth power of surface temp, thus spreading the heat over a larger surface reduces radiative efficiency.

Relative integrated IR absorption in the atmospheric window is not the same as relative radiative efficiency

Our recent study has focused on a molecule's radiative efficiency within the atmospheric window region of the IR spectrum, which can be thought of as a molecule's inherent ability to absorb radiation in the atmospheric window.

Our study demonstrated that a large radiative efficiency results for molecules, particularly carbon compounds, that contain several polar bonds, such as C ─ F bonds, and that this effect is enhanced nonlinearly when more and more electronegative elements are bonded to a single carbon.

From the radiative efficiency they were able to calculate the spin of the black hole at the center.

Because black holes can not be observed directly, Schulze's team instead measured emissions from oxygen ions [O III] around the black hole and accretion disk to determine the radiative efficiency; i.e. how much energy matter releases as it falls into the black hole.

The GTP metric requires knowledge of the same parameters as the GWP metric (radiative efficiency and lifetimes), but in addition, the response times for the climate system must be known, in particular if the lifetime of component x is very different from the lifetime of the reference gas.

More recently, Young et al. (11) have derived a structure activity relationship for fluoriniated ethers as related to their radiative efficiency.

Recently, we reported a study aimed at understanding the fundamental molecular properties that are inherently important for a molecule's radiative efficiency (8), which directly impacts the global warming potential (GWP) for a given molecule (9).

Both of these recent studies are useful, but they are limited in their predictive capability, and especially in transferability of their conclusions and suggestions to other classes of compounds, which is simply because neither of these studies identified the fundamental molecular properties involved in determining a molecule's radiative efficiency and how these might be used to identify strategies for minimizing a molecule's radiative efficiency.

The report further shows that the radiative forcing of a molecule is basically a product of its radiative efficiency and its atmospheric abundance.

Other recent studies have reported on aspects of a molecule's structure in relation to its radiative efficiency (10, 11).

While they show that there is indeed an influence on a molecule's radiative efficiency with respect to whether a CF3 group is bonded to the ether oxygen atom or whether it is more removed from the ether oxygen, for example, their study misses the underlying fundamental molecular properties responsible for radiative efficiency.