- A Car Powered by Liquid Nitrogen! University of North Texas CooLN2Car Designed, built, and tested by Dr. Carlos Ordonez (Physics), Dr. Mitty Plummer (Engineering Technology), and Dr. Rick Reidy (Department of Materials Science) of the University of North Texas , this developmental zero emission vehicle employs a cryogenic heat engine and is fueled by liquid nitrogen. This research was funded by ...www.mtsc.unt.edu/CooLN2Car.html