Absorption Refrigeration:
Absorption refrigeration is a type of refrigeration system that does not require electric power to operate. It uses a combination of a refrigerant and an absorbent to produce cooling effects. The refrigerant absorbs heat from the desired space and evaporates, while the absorbent absorbs the vaporized refrigerant and transports it to the generator. In the generator, the refrigerant is separated from the absorbent through heat input, and the refrigerant vapor is then condensed and cooled to produce the desired refrigeration effect.

Vapour Absorption Refrigeration:
Vapour absorption refrigeration is a specific type of absorption refrigeration that uses a combination of a refrigerant and an absorbent. The refrigerant used is typically ammonia (NH3), while the absorbent is usually water (H2O). This refrigeration system operates on the principle of the absorption of ammonia vapor by water. The process consists of several stages including evaporation, absorption, desorption, and condensation. It does not require any moving parts and can be driven by a heat source such as a gas burner, waste heat, or solar energy.

Advantages of Vapour Absorption Refrigeration:
- No electric power required: Vapour absorption refrigeration systems are ideal for places where there is no electric power available, such as remote areas or off-grid locations.
- Environmentally friendly: Unlike vapour compression refrigeration systems that use synthetic refrigerants, vapour absorption refrigeration systems use natural refrigerants like ammonia, which have low global warming potential and ozone depletion potential.
- Quiet operation: Vapour absorption refrigeration systems do not have any moving parts, resulting in quiet operation and less noise pollution.
- Suitable for large-scale applications: Vapour absorption refrigeration systems can be scaled up to handle large cooling loads, making them suitable for industrial applications.

Disadvantages of Vapour Absorption Refrigeration:
- Low coefficient of performance (COP): Vapour absorption refrigeration systems typically have lower COP compared to vapour compression refrigeration systems, meaning they are less energy efficient.
- Higher cost: Vapour absorption refrigeration systems are generally more expensive to install and maintain compared to vapour compression refrigeration systems.
- Limited temperature range: Vapour absorption refrigeration systems are not suitable for producing very low temperatures, making them less suitable for certain applications such as freezing.

In conclusion, vapour absorption refrigeration is the most suitable option for obtaining refrigeration in places without electric power. It offers the advantage of not requiring electricity and can be driven by various heat sources. However, it is important to consider the specific requirements and limitations of the system before deciding on its implementation.