of refrigeration. One ton of refrigeration is the refrigeration produced by melting one ton of ice at 32°F in 24 hours. It is the rate of removing heat equivalent to 12,000 British thermal units per hour (Btu/hr) or 200 Btu/min. For more details on refrigeration principles, see References Kern, 1950, and Smith, VanNess, and Abbott, 2005.