1. Introduction

 

Heat pipes are high-efficiency devices for transferring large amounts of heat with minimal temperature difference. Compact and energy-saving, they are widely applied in electronics, aerospace, and industrial cooling.

 

2. Structure & Working Principle

 

A basic heat pipe includes a sealed tube, working fluid, and wick. It operates via phase change: fluid evaporates (absorbing heat) at the evaporator, condenses (releasing heat) at the condenser, and returns via the wick’s capillary action.

 

3. Common Types

 

- Copper-Water: For 20–150℃, used in electronics cooling.

- Aluminum-Ammonia: Lightweight, for low-temperature (below 0℃) scenarios.

- High-Temperature: Uses molten salts/metals, for industrial high-heat environments.

 

4. Key Features

 

- Superior heat transfer efficiency vs. copper/aluminum.

- Passive operation, no external power required.

- Compact, lightweight, ideal for space-limited uses.

- Uniform temperature for stable heat transfer.

 

5. Applications

 

Widely used in electronics (CPU/LED cooling), aerospace, solar energy, and industrial equipment.

 

6. Conclusion

 

Heat pipes are essential passive devices, critical for efficient cooling and heat recovery across industries.