5.1.7. Specific Volume

Try these first

1. 1.

   What does DBT stand for?

   Hint

   Think of actual air temperature.

2. 2.

   Name one example of comfort air-conditioning.

   Hint

   Where do people usually feel comfortable?

3. 3.

   What is the primary function of comfort air-conditioning?

   • To control humidity
   • To cool and heat air
   • To maintain suitable temperature and humidity

   Hint

   Think about what people need to feel comfortable.

4. 4.

   True or False: Psychrometry only studies dry air.

   • True
   • False

   Hint

   Focus on the key term 'moist air'.

5. 5.

   A central AC system is failing to maintain optimum humidity levels. Analyze the components using psychrometric principles to identify potential causes.

   Hint

   Consider how each psychrometric property interacts.

6. 6.

   Using the psychrometric chart, determine the energy requirements to cool a 500 CFM airflow from 80°F DBT and 70% RH to 70°F DBT and 40% RH.

   Hint

   Remember to reference the chart for specific heat values.