A day-ton of refrigeration is defined as the amount of refrigeration produced by melting 1 ton of ice at 32°F in 24 hours.

A day-ton of refrigeration is defined as the amount of refrigeration produced by melting 1 ton of ice at 32°F in 24 hours.

• A. True
• B. False
• C. Not applicable
• D. Cannot be determined

Answer: (A)

A day-ton of refrigeration is a unit of cooling capacity defined by the heat needed to melt one ton (2000 pounds) of ice at 32°F in 24 hours. The latent heat of fusion for ice at 32°F is about 144 BTU per pound, so melting 2000 pounds requires 2000 × 144 = 288,000 BTU in a day. Dividing that by 24 hours gives 12,000 BTU per hour, which is exactly one ton of refrigeration. This is why HVAC equipment capacities are described in tons, with 1 ton equaling 12,000 BTU/hr. The other options don’t fit because this is a standard, explicit definition in the field.

A day-ton of refrigeration is a unit of cooling capacity defined by the heat needed to melt one ton (2000 pounds) of ice at 32°F in 24 hours. The latent heat of fusion for ice at 32°F is about 144 BTU per pound, so melting 2000 pounds requires 2000 × 144 = 288,000 BTU in a day. Dividing that by 24 hours gives 12,000 BTU per hour, which is exactly one ton of refrigeration. This is why HVAC equipment capacities are described in tons, with 1 ton equaling 12,000 BTU/hr. The other options don’t fit because this is a standard, explicit definition in the field.