Load & Design第 2 / 110 题
One ton of cooling capacity is equal to how many BTU per hour?
a.6,000 BTU/hr
b.9,000 BTU/hr
c.12,000 BTU/hr
d.15,000 BTU/hr
解析
A ton of refrigeration equals 12,000 BTU/hr, derived from the heat needed to melt one ton of ice in 24 hours. This unit is the standard used to size air-conditioning and heat-pump equipment. A 3-ton system therefore provides about 36,000 BTU/hr of cooling.
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同考点相关题目
- In residential load calculations, what does an ACCA Manual J procedure primarily determine?
- A common rule-of-thumb airflow value for a residential cooling system is approximately how many CFM per ton?
- A 4-ton air-conditioning system is designed at 400 CFM per ton. What total supply airflow is required?
- The sensible heat formula uses which constant when air volume is in CFM and temperature difference is in degrees F?
- Using the sensible heat formula, how much sensible heat is removed when 1,200 CFM of air is cooled through a 20 degree F temperature drop?
- What does ACCA Manual D provide guidance for?