Of all the alternative energy sources that the future hopefully holds for the world, fuel cells must be the most promising and exciting. Hydrogen, after all, is the most common element on the Earth and in the universe, so the prospect of easily, safely turning it into an endless source of energy is incredibly attractive. Couple that with the fact that functional fuel cells turn that gas into nothing other than energy and pure water, and it is easy to see why so many experts look forward to their wider availability.

There is still some progress to be made, though, before fuel cells become a fixture of everyday life and industry. While fuel cells are now online and doing duty in a variety of specialized settings, their drawbacks mean that they will probably not become more common without significant advances.

Companies like PDC Machines, then, are doing important work by helping to further the state of the art with regard to fuel cells. Although progress in this exciting field can sometimes be a little slower than some would like, the reality is that there has been a steady stream of advancements in recent years.

One of these is the growing spread of technologies that allow for the use of higher pressures in active fuel cells. As is related at http://www.pdcmachines.com/fuel-cell-tech/, one of the major challenges remaining with fuel cells is that the low-pressure units typically thought of as suitable for widespread use do not offer much in the way of energy density. This means that creating safe, affordable fuel cells that operate with higher pressure will be a critical requirement for the spread of this form of alternative energy.

That turns out to be a little harder to do than might be supposed. In addition to being the simplest element of all, hydrogen is fairly volatile, with plenty of high-profile accidents like the infamous demise of the Hindenburg owing to this fact. Putting it under higher pressure, then, can increase the overall risk associated with the substance, something that needs to be accounted for. Recent advancements, though, have helped to take the edge off some of these dangers, bringing the day when fuel cells will be ubiquitous a little closer.