Principles Of Operation; Introduction; Air System - Ingersoll Rand Nirvana 1000 Manual Del Operador

7.1 INTRODUCTION

Ingersoll Rand Nirvana™ Cycling dryers remove moisture from
compressed air by cooling the air temperature to between
36° and 40°F (2 and 4°C). This causes vapors to condense into
liquid droplets which can then be easily removed from the
air. The major systems of the dryer which contribute to its
operation are the Air System, the Moisture Removal System, the
Refrigeration System, the Thermal Mass Circulating System and
the Controls. The following paragraphs describe each of the
systems in greater detail.

7.2 AIR SYSTEM

The air system consists of the dryer components which are
in contact with the compressed air. Referring to Figure 1
and following the bold "AIR FLOW, " hot saturated air from
6

7.0 PRINCIPLES OF OPERATION

the compressor enters the precooler/reheater where the air
temperature is reduced prior to entering the chiller by the cool
air exiting the air/moisture separator. This precooling allows
for the use of a smaller refrigeration system. The air then goes
into the chiller section where it is further cooled to the desired
dew point by a thermal mass fluid. The temperature of the
thermal mass fluid is maintained by the refrigeration circuit and
controls. The air continues to the separator where moisture is
removed, thereby, allowing the cool, dry air to return back to
the precooler/reheater to be heated by the incoming moist hot
air. The air exiting the "reheater" portion of the dryer should be
approximately 15°- 20°F lower than the inlet air temperature
based on standard conditions at full rated flow.
Nirvana Cycling Refrigerated Dryer Models 1000-1600
ingersollrandproducts.com
PROCESS AND INSTRUMENTATION DIAGRAM
NVC1000-1600
AIR AND WATERCOOLED
550029 F