Power consumption of a home refrigerator can be cut by
29% while improving cooling capacity. Researchers replaced widely
used but environmentally unfriendly R134a refrigerant with the more
energy-efficient R600a dosed with multi-walled carbon nanotube
nanoparticles (MWCNT). This drop-in refrigerant replacement can be
deployed in the field by trained technicians, says an engineer from
the University of Johannesburg.