Transcript NH3 BASED SCREW COMPRESSOR CHILLER Some of our Mechanical advances We use Bitzer (Germany) make Ammonia Screw compressors which ensures us of full.

NH3 BASED SCREW COMPRESSOR CHILLER
Some of our Mechanical advances
We use Bitzer (Germany) make
Ammonia Screw compressors which
ensures us of full reliability and
sturdiness at any point of time.
We use Alfa-Laval (Sweden) make
WPHEs in the evaporator as well as the
condenser(optional) in the chilling
system.
This empowers us to increase the
compactness and overall thermal
efficiency of the system.
It also reduces maintenance cost.
“EFF. 1” electric motors of esteemed
brands namely Siemens and Bharat
Bijlee is used to run the screw.
A self-aligned feature has been
introduced using flange cum foot
mounting motor.
A compressor can be mounted on the
motor flange by 6/8 bolts resulting into
perfect alignment.
The system comes as a fully
integrated package of components
mounted compactly on a skid.
This
makes
it
simpler
for
transportation.
Our compact screw chiller has pair of
highly efficient 2 stage oil separator
and a shell and tube oil-cooler.
This oil cooler is now available in
PHE type also.
An Extraordinary Feature
The Auto Oil Return System to retain WPHE efficiency:
After the vigorous separation of oil from the high pressure gas in the oil separator,
still further, about 2-3 ppm oil gets carried away with the gas which is recovered from the
bottom of the chiller by specially designed oil return system which is then pumped to the
suction of the compressor.
Some of our Electrical and Electronic advances
We use Huba (Switzerland) make
Digital pressure transducers and flow
meters(optional) which give 4-20 mA
output directly read by the PLC.
We have devised a Digital Sensor and
controller for the level of liquid
ammonia in the receiver.
Time
Date
Ch_temp IN Ch_temp_OUT CN_wtemp_In CN_wtemp_Out
23:16:27 7/27/2010
1705
1708
0
1707
23:16:28 7/27/2010
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0
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23:16:28 7/27/2010
1705
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23:16:29 7/27/2010
1704
1707
0
1706
23:16:30 7/27/2010
1703
1707
0
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23:16:30 7/27/2010
1703
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23:16:31 7/27/2010
1704
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23:16:31 7/27/2010
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23:16:32 7/27/2010
1703
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23:16:33 7/27/2010
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23:16:33 7/27/2010
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23:16:34 7/27/2010
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23:16:34 7/27/2010
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23:16:36 7/27/2010
1704
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1706
A Data logging and auto History sheet
generation is another special feature.
We also offer a provision for direct
printout of the log sheet on dot matrix
printer.
In the data sheet as well as in the history
log generated and stored in .xls format,
we cover up all important parameters of
the system such as Suction, Discharge
and Oil pressures, Suction, Discharge
Temperatures, filter pressure drop and
even the Instantaneous EER values.
This makes it easy for the user to keep a
check on the EER values daily which can
guide the operator as to when the system
needs maintenance before its efficiency
lowers considerably.
The system comes with a state-of-the-art
automation and control technology.
Delta make Programmable Logic Control is
further supported by the delta make HMI of
very high resolution coming with 65536 real
colors.
The pressure and the Nh3 liquid level are
directly plotted as instantaneously changing
bar graphs and pie graphs. Even trend graphs
can be generated(optional).
Also these HMI devices are one of their
kind.
They are provided with 2 serial female
COM ports, 1 male COM port, and a
downloading cable.
Special feature of this HMI device is that
it can store the history sheets in the
expandable USB memory chip if
connected to the given port.
Some Other Optional Features
The system can be equipped with an external
module for Radio Frequency transmission of
parameters values and the user at the other
end receives these values, provided he is
within the range of 1 kM diameter.
Also we offer to provide a facility to
monitor the important parameters’ data
on your PC with SCADA.
For applications which need constant suction
pressure to be maintained, to get constant
chill water temperature we suggest the use of
this Evaporator Pressure Regulatory Valve
(PM/ C4A).
This valve enables the user to get the lowest
clear temperature of water around 2 Deg.C
without addition of MEG by avoiding
freezing in the WPHE.