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The refrigerant circuit in vapour-absorption cycle consists of
- a)condenser + expansion device
- b)condenser + expansion device + evaporator
- c)condenser + expansion device + absorber
- d)condenser + absorber + pump
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The refrigerant circuit in vapour-absorption cycle consists ofa)conden...
The compressor
Compression is the first step in the refrigeration cycle, and a compressor is the piece of equipment that increases the pressure of the working gas. Refrigerant enters the compressor as low-pressure, low-temperature gas, and leaves the compressor as a high-pressure, high-temperature gas.
Types of compressors
Compression can be achieved through a number of different mechanical processes, and because of that, several compressor designs are used in HVAC and refrigeration today. Other examples exist, but some popular choices are:
1. Reciprocating compressors
2. Scroll compressors
3. Rotary compressors
The condenser
The condenser, or condenser coil, is one of two types of heat exchangers used in a basic refrigeration loop. This component is supplied with high-temperature high-pressure, vaporized refrigerant coming off the compressor. The condenser removes heat from the hot refrigerant vapor gas vapor until it condenses into a saturated liquid state, a.k.a. condensation.
After condensing, the refrigerant is a high-pressure, low-temperature liquid, at which point it’s routed to the loop’s expansion device.
The expansion device
These components come in a few different designs. Popular configurations include fixed orifices, thermostatic expansion valves (TXV) or thermal expansion valves (pictured above), and the more advanced electronic expansion valves (EEVs). But regardless of configuration, the job of a system’s expansion device is the same - create a drop in pressure after the refrigerant leaves the condenser. This pressure drop will cause some of that refrigerant to quickly boil, creating a two-phase mixture.
This rapid phase change is called flashing, and it helps tee up the next piece of equipment in the circuit, the evaporator, to perform its intended function.
The evaporator
The evaporator is the second heat exchanger in a standard refrigeration circuit, and like the condenser, it’s named for its basic function. It serves as the “business end” of a refrigeration cycle, given that it does what we expect air conditioning to do – absorb heat.
This happens when refrigerant enters the evaporator as a low temperature liquid at low pressure, and a fan forces air across the evaporator’s fins, cooling the air by absorbing the heat from the space in question into the refrigerant.
After doing so, the refrigerant is sent back to the compressor, where the process restarts. And that, in a nutshell, is how a refrigeration loop works. If you have any questions about the refrigeration cycle or its components and how they work, give us a call. We've been helping customers get the most out of their HVAC and refrigeration equipment for nearly 100 years.
Most Upvoted Answer
The refrigerant circuit in vapour-absorption cycle consists ofa)conden...
The refrigerant circuit in a vapor-absorption cycle consists of:
- Condenser
- Expansion Device
- Evaporator
- Absorber
Explanation:
The vapor-absorption cycle is a type of refrigeration cycle that uses a combination of a refrigerant and an absorbent to achieve cooling. It is commonly used in large-scale refrigeration systems and is known for its low power consumption.
The refrigerant circuit in a vapor-absorption cycle includes the following components:
1. Condenser:
The condenser is the component where the hot refrigerant vapor coming from the evaporator is cooled and condensed into a liquid. It transfers heat from the refrigerant to the cooling medium (usually air or water) and allows the refrigerant to change phase from a vapor to a liquid.
2. Expansion Device:
The expansion device is located between the condenser and the evaporator. It is responsible for reducing the pressure of the condensed refrigerant liquid, thereby causing it to expand and evaporate. This expansion results in a drop in temperature, which is necessary for the refrigeration process.
3. Evaporator:
The evaporator is where the low-pressure refrigerant vapor absorbs heat from the surroundings, such as the air or water being cooled. As the refrigerant evaporates, it absorbs heat energy, causing the surroundings to cool down. This is the part of the cycle where cooling is achieved.
4. Absorber:
The absorber is the component where the refrigerant vapor, after leaving the evaporator, is absorbed by the absorbent. The absorbent is a substance that has a high affinity for the refrigerant and helps to separate it from the vapor mixture. This allows the refrigerant to be recycled back into the cycle.
By following this circuit, the vapor-absorption cycle can continuously remove heat from a space or process, providing cooling effects. The cycle is driven by the absorption of the refrigerant vapor by the absorbent and the subsequent release of the refrigerant by heating the absorbent. This allows the refrigerant to be effectively recycled and used for cooling purposes.
Therefore, the correct answer is option 'B' - condenser, expansion device, and evaporator.
- Condenser
- Expansion Device
- Evaporator
- Absorber
Explanation:
The vapor-absorption cycle is a type of refrigeration cycle that uses a combination of a refrigerant and an absorbent to achieve cooling. It is commonly used in large-scale refrigeration systems and is known for its low power consumption.
The refrigerant circuit in a vapor-absorption cycle includes the following components:
1. Condenser:
The condenser is the component where the hot refrigerant vapor coming from the evaporator is cooled and condensed into a liquid. It transfers heat from the refrigerant to the cooling medium (usually air or water) and allows the refrigerant to change phase from a vapor to a liquid.
2. Expansion Device:
The expansion device is located between the condenser and the evaporator. It is responsible for reducing the pressure of the condensed refrigerant liquid, thereby causing it to expand and evaporate. This expansion results in a drop in temperature, which is necessary for the refrigeration process.
3. Evaporator:
The evaporator is where the low-pressure refrigerant vapor absorbs heat from the surroundings, such as the air or water being cooled. As the refrigerant evaporates, it absorbs heat energy, causing the surroundings to cool down. This is the part of the cycle where cooling is achieved.
4. Absorber:
The absorber is the component where the refrigerant vapor, after leaving the evaporator, is absorbed by the absorbent. The absorbent is a substance that has a high affinity for the refrigerant and helps to separate it from the vapor mixture. This allows the refrigerant to be recycled back into the cycle.
By following this circuit, the vapor-absorption cycle can continuously remove heat from a space or process, providing cooling effects. The cycle is driven by the absorption of the refrigerant vapor by the absorbent and the subsequent release of the refrigerant by heating the absorbent. This allows the refrigerant to be effectively recycled and used for cooling purposes.
Therefore, the correct answer is option 'B' - condenser, expansion device, and evaporator.
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