Friday, December 5, 2014

COMPARISON OF REFRIGERATION & HVAC COMPRESSORS


VOLUMETRIC EFFICIENCIES

Reciprocating compressor:  65% to 92%

Rotary compressor:  87% to 92%

Scroll compressor:  > 95%

Screw compressor:  87% to 94%

Centrifugal compressor:  > 99%



CAPACITY (TONNAGE) USAGE


Reciprocating compressor: below 5 tons, below 10 tons, 10-20 tons, 5-150 tons   

Rotary compressor: below 5 tons

Scroll compressor:  5 to 10 tons

Screw compressor:  20 to 750 tons 

Centrifugal compressor: > 150 tons, 10,000-20,000 tons

 

INSTALLATIONS/APPLICATIONS


Reciprocating compressor:
refrigerators, freezers, ice machines, residential air conditioning, heat pumps, split air conditioners, residential to light commercial

Rotary compressor:
home appliances, refrigerators, room air-conditioners, window units, residential central air conditioning, heat pumps

Scroll compressor:
automobile air conditioning systems, heat pumps, freezers, water coolers, large residential, light commercial Central systems, commercial chillers

Screw compressor:
commercial chillers, large commercial and industrial market  

Centrifugal compressor:
industrial and commercial cooling and air conditioning, heat pump, commercial and industrial chillers, largest systems



ADVANTAGES:


Reciprocating compressor:
most commonly used, versatile, robust and powerful, durable (endurance), economical to operate, low initial cost, easy to install, reaches high pressures  

Rotary compressor:
high reliability, high durability, quiet, very efficient, few moving parts, low rotational speeds, low initial cost, low maintenance costs, usable in dirty environments

Scroll compressor:
reliable, very durable, very efficient, lesser moving parts, smoother and quieter operation, less torque variation, 

Screw compressor: 
can produce high pressure, consume less power than reciprocating compressors, low to medium initial and maintenance costs, few moving parts

Centrifugal compressor: 
pumping efficiency increases with speed, no valves, pistons or cylinders, few moving parts


DISADVANTAGES:

Reciprocating compressor:
vibrational issues, noisy, requires maintenance

Rotary compressor:
used on small systems, limited to smaller volumes, lesser pressure developed

Scroll compressor:   
typically more expensive, cooling is difficult compared to piston compressors

Screw compressor: 
difficulty in dirty environments, high rotational speeds, shorter life expectancies

Centrifugal compressor: 
operate at high speeds (e.g. 25,000 rpm), main bearings commonly subject to wear and tear, not positive displacement (fixed volume chamber/casing) 

4 comments:

  1. nic your blog and i like it ur information thank uhh..!!

    Compressor Part

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  2. Thank you for the compilation, may I inquire of the sources of these information?

    ReplyDelete
  3. From portable air compressors, oil-free compressors to rotary screw compressors, Cooper Freer can provide regular and cost effective air compressor services in Leicester, Peterborough, Corby, Northampton, Nottingham, Derby, UK, Milton Keynes, Kettering, Coventry, and Lincoln.

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