The most recent International Institute of Ammonia Refrigeration (IIAR) Conference examined some of the latest research in terms of working with equipment running on natural refrigerants. The significance was not lost on attendees as such refrigerants continue to gain a foothold in commercial as well as the long-standing industrial applications. The June edition of FROSTline, The NEWS’ refrigerant e-newsletter, highlighted four of those papers. We now look at the remaining four. (All are posted in their entirety at www.iiar.org.)
One ongoing focus of research with ammonia is to find ways to reduce its charge to allow wider applications. For Pega Hrnjak, president, Creative Thermal Solutions, and resident professor and codirector, air conditioning and refrigeration center at the University of Illinois, this reduced change encompasses what he called ultra low-charge ammonia systems.