IDEC: Physical Model

Objective:

To exercise on scaled model of IDEC

Outcome:

Students will understand how Direct and Indirect Evaporative Cooling systems work with hands-on experience of model making. 

Requirements:

Panels (of what material, type?) for Heat Exchanger, Water, Water pipes, Fan, Water tank, Float valve, Air blower, Cardboard

Prerequisites:

 A conceptual knowledge of

1. Evaporative cooling
2. Direct Evaporative cooling
3. Indirect Evaporative cooling

Procedure:

Step 1: Organise the class into smaller groups of students to work on components individually.

Step 2: Create a structure with four walls, roof and floor to mimic an actual room.

Step 3: Create two kinds of panels to allow dry and wet air streams. Make the panels of two different colours to distinguish their purpose.

Step 4: Assemble them alternatively. This becomes a heat exchanger.

Step 5: Place the water pipe above these panels. Make holes in the pipe to ensure water drips only over wet airstream panels

Step 6: Switch on the water supply so that water drips on the panels meant for wet airstream

Step 7: Switch on the fan

Step 8: Allow warm air to pass through the wet surface of the heat exchanger so that water on it evaporates and material of heat exchanger gets cooled.

Step 9: Allow air to pass through the dry panels of the heat exchanger where it is cooled by its virtue of interaction with the cool surface

Step 10: Air is now cooled and using a pipe let it out the other end

References:

Fair conditioning youtube channel: Indirect Direct Evaporative Cooling Animation