Difference between revisions of "Refrigerated Dryers"

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Refrigerated Dryers (view source)

Revision as of 07:34, 30 July 2012

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===Function===
===Function===
Refrigeration dryers employ two heat exchangers,  one for air-to-air and  one for air to refrigeration. However, there is  also a single heat  exchanger that combines both functions. The compressors used in this  type of dryer are usually of the hermetic type and the most common gas  used is R-134a. The goal of having two  heat exchangers is that the cold outgoing air  cools down the hot  incoming air and reduces the size of compressor  required. At the same  time the increase in the temperature of outgoing  air prevents  re-condensation.
Refrigeration dryers employ two heat exchangers,  one for air-to-air and  one for air to refrigeration. However, there is  also a single heat  exchanger that combines both functions. The compressors used in this  type of dryer are usually of the hermetic type and the most common gas  used is R-134a. The goal of having two  heat exchangers is that the cold outgoing air  cools down the hot  incoming air and reduces the size of compressor  required. At the same  time the increase in the temperature of outgoing  air prevents  re-condensation.
As of the year 2000, most manufacturers started producing energy  saving dryers that do not make use of a hot-gas by pass. These dryers can save up to 40% in total energy and can consume only 10% of the max  power when idle. They employ digital control and sometimes variable  speed compressors.
Some manufacturers are marketing compressors with built in  refrigeration dryers, but these have had a mixed acceptance in the  market.
Commonly a coalesing prefilter is installed immediately upstream of a  refrigerated dryer to remove lubricating oil and other contaminants  that have the potential to foul the dryer's heat exchangers.




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* Non-Cycling Refrigerated Air Dryers
* Non-Cycling Refrigerated Air Dryers
* High Inlet Temperature Refrigerated Air Dryers
* High Inlet Temperature Refrigerated Air Dryers
==Cycling Regrigerated Air Dryers==




==Cycling Regrigerated Air Dryers==
It will increase or decrease the refrigeration compressor load depending on  the compressed air demands. These dryers will help save money by  reducing power consumption while constantly providing consistent dew  points.
It will increase or decrease the refrigeration compressor load depending on  the compressed air demands. These dryers will help save money by  reducing power consumption while constantly providing consistent dew  points.


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