Question

Zero Energy Cool Chamber is based on the principal of

• A. Evaporative temperature
• B. Evaporative cooling
• C. High pressure temperature
• D. Low pressure cooling

Hint:

The word "Zero Energy" is a clue. It means the system doesn't use electricity. Evaporative cooling is a passive cooling method that doesn't require external energy input, unlike conventional refrigeration. Earthen pots (matkas) also work on the same principle.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The question asks for the scientific principle behind the functioning of a Zero Energy Cool Chamber (ZECC).

Step 2: Detailed Explanation:
A Zero Energy Cool Chamber is a low-cost, on-farm storage structure built with porous materials like bricks and sand. It consists of a double-walled brick chamber, and the space between the walls is filled with sand. The sand is kept moist by periodic watering. The water from the sand evaporates, and the process of evaporation requires energy, which is drawn from the surroundings. This drawing of heat leads to a lowering of the temperature inside the chamber. This phenomenon, where cooling is achieved through the evaporation of a liquid, is known as evaporative cooling. It's the same principle that makes you feel cool when you sweat.

Step 3: Final Answer:
The Zero Energy Cool Chamber is based on the principle of evaporative cooling.