Load & DesignCâu 5 / 110
The sensible heat formula uses which constant when air volume is in CFM and temperature difference is in degrees F?
a.0.68
b.1.08
c.4.5
d.0.24
Giải thích
Sensible heat (BTU/hr) equals 1.08 x CFM x delta-T, where 1.08 combines air density, specific heat, and a time conversion. The 4.5 factor is used with enthalpy for total heat, and 0.68 is used for latent load with grains of moisture. These formulas let technicians verify airflow and capacity.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- One ton of cooling capacity is equal to how many BTU per hour?
- A common rule-of-thumb airflow value for a residential cooling system is approximately how many CFM per ton?
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- 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?
- After a Manual J load is calculated, which ACCA procedure is used to select the specific equipment model?
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