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Consider the following statements regarding refrigerants: 
1. Refrigerant NH3 is used in reciprocating compressors.
2. Refrigerant CO2 is used in reciprocating compressors.
3. Refrigerant R-11 is used in centrifugal compressors.  
Which of these statements are correct?
  • a)
    1 and 3  
  • b)
    1 and 2  
  • c)
    2 and 3  
  • d)
    1, 2 and 3 
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements regarding refrigerants:1. Refrigeran...
 (A) option is Correct 
The reciprocating compressor are used for refrigerants which have comparatively low volume per kg and large differential pressure. Such as ammonia (R-717), R-11, R-12. R-22 and methyl chloride (R-40).
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Most Upvoted Answer
Consider the following statements regarding refrigerants:1. Refrigeran...
Refrigerants and their use in compressors:

Refrigerants are substances used in refrigeration cycles to transfer heat and provide cooling. The choice of refrigerant depends on the specific application, operating conditions, and efficiency requirements. Compressors are an essential component of refrigeration systems, and different types of compressors are used depending on the refrigerant properties and system requirements.

Correct statements regarding refrigerants and compressors:

1. Refrigerant NH3 is used in reciprocating compressors:
Reciprocating compressors are positive-displacement compressors that use pistons to compress the refrigerant gas. Ammonia (NH3) is a common refrigerant used in industrial applications, such as food processing, cold storage, and chemical plants. Reciprocating compressors are suitable for handling NH3 because it is non-toxic, non-flammable, and has high cooling capacity.

3. Refrigerant R-11 is used in centrifugal compressors:
Centrifugal compressors are dynamic compressors that use impellers to accelerate and compress the refrigerant gas. R-11 (Trichlorofluoromethane) is a refrigerant that was commonly used in centrifugal compressors for air conditioning and refrigeration applications. However, R-11 has been phased out due to its ozone-depleting potential and replaced by alternative refrigerants.

Incorrect statement regarding refrigerants and compressors:

2. Refrigerant CO2 is used in reciprocating compressors:
Carbon dioxide (CO2) is a natural refrigerant that has gained popularity due to its low global warming potential (GWP) and zero ozone depletion potential (ODP). However, CO2 is not commonly used in reciprocating compressors because it requires higher pressure ratios and has lower cooling capacity compared to traditional refrigerants. Instead, CO2 is used in transcritical and subcritical systems that employ specialized compressors designed for CO2 refrigeration.

Therefore, the correct statements regarding refrigerants and compressors are 1 and 3, and the answer is option 'A'.
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Consider the following statements regarding refrigerants:1. Refrigerant NH3 is used in reciprocating compressors.2. Refrigerant CO2 is used in reciprocating compressors.3. Refrigerant R-11 is used in centrifugal compressors. Which of these statements are correct?a)1 and 3 b)1 and 2 c)2 and 3 d)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?
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