4.1. System Modeling

Try these first

1. 1.

   What does DBT stand for?

   Hint

   It’s a common temperature measurement.

2. 2.

   What key variable indicates moisture in the air?

   Hint

   Think of evaporation effects.

3. 3.

   What does WBT stand for?

   • Wet Bulb Temperature
   • Warm Bulb Temperature
   • Water Block Temperature

   Hint

   It relates to evaporation effects.

4. 4.

   The equation Q = m * cp * ΔT is used to calculate?

   • True
   • False

   Hint

   What do the components represent?

5. 5.

   Given a system with an air flow of 2 kg/s, a specific heat of 1.006 kJ/kg.K, and a temperature change of 10°C, calculate the sensible heat transfer.

   Hint

   Remember the formula for sensible heat.

6. 6.

   If you mix two air streams, one at 20°C (2 kg/s) and another at 30°C (3 kg/s), what is the mixed temperature?

   Hint

   Recognize that you’re finding a weighted average based on flow rates.