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The use of Refrigerant R–22 for temperature below – 30º is not recommended due to its
- a)good miscibility with lubricating oil
- b)Good evaporating temperature
- c)low evaporating temperature
- d)high compressor discharge temperature
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
The use of Refrigerant R–22 for temperature below – 30&ord...
Refrigerant R22 is widely used in air conditioning and refrigeration systems. However, its use for temperatures below 30 degrees Celsius is not recommended due to various reasons.
High Compressor Discharge Temperature:
One of the main reasons why R22 is not recommended for temperatures below 30 degrees Celsius is due to its high compressor discharge temperature. This is because R22 has a high compression ratio, which results in high discharge temperatures. High compressor discharge temperatures can lead to compressor failure, reduced efficiency, and increased energy consumption.
Poor Miscibility with Lubricating Oil:
Another reason why R22 is not recommended for low-temperature applications is its poor miscibility with lubricating oil. At low temperatures, R22 tends to separate from the lubricating oil, which can cause lubrication problems and result in compressor failure.
Low Evaporating Temperature:
Although R22 has a low evaporating temperature, it is not suitable for temperatures below 30 degrees Celsius. This is because at low temperatures, R22 tends to condense and accumulate in the compressor, which can cause liquid slugging and result in compressor failure.
Conclusion:
In summary, the use of Refrigerant R22 for temperatures below 30 degrees Celsius is not recommended due to its high compressor discharge temperature, poor miscibility with lubricating oil, and tendency to condense and accumulate in the compressor. It is important to use a refrigerant that is specifically designed for low-temperature applications to ensure efficient and reliable operation of air conditioning and refrigeration systems.
High Compressor Discharge Temperature:
One of the main reasons why R22 is not recommended for temperatures below 30 degrees Celsius is due to its high compressor discharge temperature. This is because R22 has a high compression ratio, which results in high discharge temperatures. High compressor discharge temperatures can lead to compressor failure, reduced efficiency, and increased energy consumption.
Poor Miscibility with Lubricating Oil:
Another reason why R22 is not recommended for low-temperature applications is its poor miscibility with lubricating oil. At low temperatures, R22 tends to separate from the lubricating oil, which can cause lubrication problems and result in compressor failure.
Low Evaporating Temperature:
Although R22 has a low evaporating temperature, it is not suitable for temperatures below 30 degrees Celsius. This is because at low temperatures, R22 tends to condense and accumulate in the compressor, which can cause liquid slugging and result in compressor failure.
Conclusion:
In summary, the use of Refrigerant R22 for temperatures below 30 degrees Celsius is not recommended due to its high compressor discharge temperature, poor miscibility with lubricating oil, and tendency to condense and accumulate in the compressor. It is important to use a refrigerant that is specifically designed for low-temperature applications to ensure efficient and reliable operation of air conditioning and refrigeration systems.
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The use of Refrigerant R–22 for temperature below – 30&ord...
R−22 has freezing temperature of -160°C. It requires 5.85 cubic metres per ton per hour at evaporator temperature of 15°C. It gives a coefficient of performance of around 4.66 and consumes around 1.01 horse power per ton.
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The use of Refrigerant R–22 for temperature below – 30º is not recommended due to itsa)good miscibility with lubricating oilb)Good evaporating temperaturec)low evaporating temperatured)high compressor discharge temperatureCorrect answer is option 'D'. Can you explain this answer?
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