I think an energetic one projects, which then makes a tangible energy (if that's clear), is different than someone's qi, which is a physiological byproduct of food and air similar, in a sense, to blood.
I totally know what you're talking about - say, at a concert or a festival there is definitely a thick energetic buzz in the air which people most certainly feed off of. So someone projects joy and excitement out into the world - this is not the same stuff as the refined qi that's running in your channels and circulating through your organs - but it is a type of energy nonetheless. I'm not sure it can be harnessed for anything other than a mood elevator/depressor. I wouldn't think of this human-created ambiant energy as fuel, per se, qi kind of fuel, the stuff of life, but it may just be outside my realm of experience.
People can be very animated, perhaps emotionally expressive, loud talkers, have sweeping hand gestures, be quite a large presence and still be very qi deficient. Oftentimes an excessive presentation is a marker for serious energetic stagnation.
Now, the terms qi and energy are used in a myriad of different ways in the occult community and one could make the argument about what's the difference (and it has been done on this site ad nauseum). To a practitioner of Chinese medicine - and practitioners of the Daoist arts - qi is everything and everything is qi. There is no distinction. So my efforts to thus make a distinction are of no use.
"He who speaks, doesn't know. He who knows, doesn't speak." Lao Tzu