Fair Conditioning Understanding Heat Flow Analysis – Fair Conditioning

Understanding Heat Flow Analysis



Academic Year

2'nd Year


3'rd Year

Complexity Level


Content tags

Building Heat Transfer




Thermal comfort

Activity Type


Activity duration

1-2 hours


To experience heat transfer through radiation between the human body and surroundings within an enclosed space.


Students will develop a deeper and experiential understanding of heat transfer principle of radiation and how it is essential in cooling buildings thoughtfully.


Infrared thermometer


Conceptual knowledge of heat transfer processes, Knowledge of how to measure temperature using Infrared thermometer.


Step 1: Students can either nominate a few candidates amongst them for the experiment or everyone can participate.

Step 2: Pass the infrared thermometer in the classroom. Students point the thermometer to their hand, and note down their body temperature.

Step 3: Point the thermometer towards each wall, ceiling, floor, window, surfaces with different materials and note down the temperature values collectively for each component. 

Human Body Temperature, tb (℃): 
Sr. No.Room ComponentMaterialTemperature noted in ℃ (tc)td=tb -tc (℃)Potential heat gain/loss by the body (td>0: loss, td<0: gain) 
1Wall 1
2Wall 2
3Wall 3
4Wall 4
7Window 1
8Window 2

Step 4: Students tabulate these observations (as shown above), and find the temperature difference between the human body and each room component. Positive temperature difference suggests that body can lose heat to the respective surrounding whereas negative difference suggests body can gain heat from the surroundings

Step 5: Experience the state of comfort of discomfort in both negative (body temperature is lower than the component in the surroundings) as well as positive difference (body temperature is higher than the component in the surroundings) situations.

Step 6: Share the findings and hypothesis of thermal comfort as experienced. These patterns and heat transfer principles become the base and used for cooling or heating, thereby creating a thermally comfortable space for occupants inside the building.



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