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3 cards from this section. Quick, good the night before a test.
What is sensible heat? Provide a definition.
Think about how heat affects temperature directly.
If a mass flow rate of air is 0.5 kg/s and the specific heat is 1005 J/(kg·K), what will be the heat transfer if the temperature changes by 5 K?
Use the formula Q = m·cp·ΔT.
What is the formula for sensible heat?
Recall which formula deals with temperature change.
True or False: Latent heat affects only the temperature of the air.
Think about moisture and temperature changes.
Given a mass flow rate of air as 0.25 kg/s and a latent heat of vaporization of 2,256 kJ/kg, calculate the heat transfer if the humidity ratio changes from 0.005 kg/kg to 0.01 kg/kg.
Identify the change in humidity ratio and apply the latent heat equation.
An HVAC system experiences a heat gain of 40,000 BTU/hr due to internal loads. How much cooling capacity (in kW) is required if 1 BTU/hr = 0.000293 kW?
Remember to convert BTUs to kW using the conversion factor.
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