A manufacturer in the U.S. wants to sell a refrigeration system to a customer in Germany. The standard measure of refrigeration capacity used in the United States is the ‘ton’; a one-ton capacity means that the unit is capable of making about one ton of ice per day or has a heat removal rate of 12,000 Btu/hr. The capacity of the American system is to be guaranteed at 3 tons. What would this guarantee be in SI units?
GIVEN
- A three-ton refrigeration unit to be sold in Germany
FIND
(a) The rating in SI units
Converting the refrigeration capacity to SI units we have
Although the watt is a derived unit in the SI system, it would be used to express the capacity of the
system rather than Newton meters per second.
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