4.2. Key State Variables

Try these first

1. 1.

   What is the Dry Bulb Temperature?

   Hint

   Think of a regular thermometer.

2. 2.

   Define Relative Humidity.

   Hint

   Consider how humid it feels outside.

3. 3.

   What does Dry Bulb Temperature measure?

   • Humidity
   • Air Temperature
   • Air Pressure

   Hint

   It's what you'd read on a traditional thermometer.

4. 4.

   True or False: Higher Relative Humidity suggests a higher moisture content in the air.

   • True
   • False

   Hint

   Think about how it feels on a humid day.

5. 5.

   Given the DBT is 30°C and the WBT is 20°C, calculate the RH. Assume standard atmospheric pressure.

   Hint

   Refer to how temperature and moisture interact to assess humidity!

6. 6.

   Describe a practical application of enthalpy in energy recovery ventilators in HVAC systems.

   Hint

   Think about how systems conserve energy by reusing heat.