What is boot-strap refrigeration?

BOOT-STRAPAIR COOLING SYSTEM  The term Bootstrap as used in Air Cycle Refrigeration indicates a system in which the pressure of the working fluid is raised in two levels by using two compressors, before the working fluid which is air, expands in the turbine section  The main components of this system are: • Two heat …

What is the difference between boot-strap air cooling system and boot-strap evaporative?

Note: Since the temperature of air leaving the cooling turbine in boot-strap evaporative system is lower than the simple boot-strap system, therefore mass of air (ma) per tonne of refrigeration will be less in boot- strap evaporative system.

What is the difference between boot-strap air cooling system and simple air refrigeration system?

Bootstrap Air Conditioning System is not effectively operable when the aircraft in on ground. it is actually a modification of simple aircraft refrigeration system. It consists of two heat exchanger and a secondary compressor.

What are the different types of air refrigeration cycles?

Simple air cooling system: Ambient air gets rammed before the main compressor. The air required for refrigeration system is then bled off from this compressor. It is then sent to the heat exchanger where this high pressure and high temperature air is cooled using ram air.

What is meant by air refrigeration cycle?

Air cycle refrigeration works on the reverse Brayton or Joule cycle. Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed. This work can be usefully employed to run other devices, such as generators or fans.

What cycle is used for aircraft refrigeration?

Air cycle refrigeration works on the reverse Brayton or Joule cycle. Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed.

How many compressors are used in boot strap air cooling system?

Explanation: In Boot-strap air cooling system there are two heat exchangers and a cooling turbine driving the secondary compressor instead of the cooling fan.

What is the refrigeration cycle called?

Gas cycle. When the working fluid is a gas that is compressed and expanded but does not change phase, the refrigeration cycle is called a gas cycle.

What are the four types of refrigeration cycle?

What Are the Different Types of Refrigeration Systems?

• Mechanical-Compression Refrigeration Systems. The most widely used refrigeration cycle method is mechanical compression.
• Absorption Refrigeration.
• Evaporative Cooling.
• Thermoelectric Refrigeration.