Remundo wrote:Eric Dupont wrote:when you were talking about big bands, I was thinking about the industrial group in the field of energy, total, edf, engie and also the group in the automobile, since my system is above all a powerful battery. and which makes it possible to store a large quantity of energy at low cost as the remundo emphasizes it, and like the confirmed chatelot, the yield would be less good, of the order of 60%.
good at the same time, the yield you advertise is not ridiculous (but remains to be demonstrated); if in terms of costs / kWh stored you do better than batteries ... it will have the advantage of "pulling" less on metal mines.
do not neglect anyway the price and the volume of a cryogenic tank ... on a car this volume is penalizing. For example, 2 must be counted at 3 times the volume stored.
from a theoretical point of view the engine develops 240 wh per kg of liquid nitrogen. an efficiency of 80% for this type of engine if it is of substantial power is not unrealistic. we hope 200 wh kg or even 160 wh / liter, the energy density of a good lithium battery.
if we compare the theoretical energy density compared to the compressed air engine of MDI, it is not the same on several levels. in 1 liter of tank only 300 grams of air are stored against 800 grams of liquid nitrogen. so it produces almost 3 times less energy.
the mdi motor has a double expansion but do not inject water (for the moment) so there is a loss of at least 30% may be less for low power.
thirdly the liquid air at equal weight with the compressed air has more energy because precisely there is the passage from the liquid state to the gaseous state which brings a gain of 50% as demonstrated by the patent.
to sum up for a liter of tank, the liquid nitrogen engine is capable of producing with 800 grams of nitrogen, 160 wh while the compressed air engine with 1 liter of tank and 300 grams of air is closer to 0,3, 80 * 24 wh = XNUMX wh
if we take the example of the air pod which is 400 kg with a 200 liter tank, we have an energy reserve of 5 kwh, for an urban cycle where the speed is modest on average 20 or 30 km / h. we must be able not to be far from the autonomy advanced by guy negre, autonomy which can be doubled by heating the air. on the liquid nitrogen engine we can also heat the air and double the energy capacity.
as I said, I don't think that the big groups will have fun to launch out in a legal battle to monopolize, the patent, their strategy, will be: the bashing, the indifference. wait in the hope that it does not develop to continue to sell polluting cars with which it earns money. governments will follow the same strategy.
but hey it's not a very complicated engine, you should not exaggerate.