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1. INTRODUCTION
The NHTC humidifier is controlled by Nortec’s Patented Auto adaptive Water Management
Control System. This system allows the humidifiers to adapt to basically any potable
incoming water and changes that occur to the water supply. This eliminates the need to
readjust drain timers, changes complete cylinders or time consuming adjustment of
electrode spacing’s. The system also adjusts the drain rate of the humidifier to reduce the
amount of drain water exiting the humidifier as water conditions change. This reduces
energy loss due to excessive draining of hot water and extends cylinder life since less water
and minerals enter the humidifier.
The following is a brief description of how the Auto-Adaptive water Management System
works.
The electrode steam system produces pure uncontaminated steam with variable output
through electronic power control of the electrodes. Water borne minerals remain in the
cylinder and are periodically flushed out through the automatic cylinder drain. On NHTC and
NHPC models the drain automatically empties the steam cylinder if it is not operated for
three days. Solid mineral scale sinks to the bottom of the cylinder which, when filled with
residue, is easily removed and replaced.
A. PROPOR INTEGRAL AUTO-ADAPTIVE CONTROL SYSTEM FOR THE
NHTC/ NHPC
(1)
NORTEC’s patented P+I Auto-Adaptive control system allows the unit to operate at
an optimal low water level using the same fixed electrode spacing regardless of the
incoming water conditions. Boiling of the water allows the minerals in the water to
remain behind in the cylinder. This raises the contained water conductivity to a
value higher than the incoming water. The P+I Auto-Adaptive control system
monitors and adjusts the contained water conductivity as these changes occur.
(2)
The humidifiers are designed to produce full steam output at the lowest possible
electrode coverage to obtain maximum cylinder life.
(3)
The units operate between A and D of the main steam output demand.
Accordingly, the current flow between the electrodes in the cylinder is maintained
between these pre-established limits programmed into the P+I Auto-Adaptive
control system.
(4)
As the water boils away and the electrode coverage is reduced, the steam output is
also reduced slightly. A pre-determined design parameter of every NORTEC
cylinder is the known time (To) (time optimum) that it takes to boil down from A to
D of output (also referenced to as amp trigger points) at a pre-designed contained
water conductivity. (See Figure 2.)
(5)
Whenever the conductivity in the cylinder water is lower than the designed
conductivity, the (Ta) (time actual) to boil down from A to D will be longer than the
To. (See Figure 3.)
Summary of Contents for NHPC
Page 1: ...2538144 B NH Series NHTC NHPC ELECTRODE STEAM HUMIDIFIER Engineering Manual TM ...
Page 9: ...10 00 Page 1 2008 10 01 10 00 INTRODUCTION ...
Page 10: ...10 00 Page 2 2008 10 01 Figure 1 NHTC ...
Page 13: ...10 00 Page 5 2008 10 01 Figure 2 Optimum Boiling Time Figure 3 Conductivity ...
Page 18: ...10 00 Page 10 2008 10 01 Figure 6 Typical NHRS Installation Sheet 1 of 2 ...
Page 19: ...10 00 Page 11 2008 10 01 Figure 7 Typical NHRS Installation Sheet 2 of 2 ...
Page 20: ...10 10 Page 12 2008 10 01 10 10 HUMIDITY STEAM ABSORPTION AND DISTRIBUTION ...
Page 35: ...10 10 Page 27 2008 10 01 Figure 2 Psychrometric Chart ...
Page 64: ...10 10 Page 56 2008 10 01 Figure 30 NORTEC OnLine Monitoring ...
Page 71: ...10 20 Page 63 2008 10 01 10 20 SPECIFICATIONS ...
Page 81: ...10 30 Page 73 2008 10 01 10 30 SUBMITTALS ...
Page 86: ...10 30 Page 78 2008 10 01 Figure 2 Primary Line Voltage Wiring to Unit ...
Page 87: ...10 30 Page 79 2008 10 01 Figure 3 Physical Data NHTC NHPC 005 030 ...
Page 88: ...10 30 Page 80 2008 10 01 Figure 4 Physical Data NHTC NHPC 050 100 ...
Page 89: ...10 30 Page 81 2008 10 01 Figure 5 Physical Data NHTC NHPC 150 200 ...
Page 96: ...10 30 Page 88 2008 10 01 Figure 12 In Duct AHU Installation With Mounting Frame Installation ...
Page 98: ...10 30 Page 90 2008 10 01 Figure 13 In Duct AHU Installation With Mounting Frame Installation ...
Page 100: ...10 30 Page 92 2008 10 01 Figure 16 Atmospheric SAM e Adapter Dimensions ...
Page 101: ...10 30 Page 93 2008 10 01 Figure 17 Atmospheric Steam Header and Adapter Configuration ...
Page 102: ...10 30 Page 94 2008 10 01 Figure 18 Physical Data for Remote Mounted Blower Pack ...
Page 103: ...10 30 Page 95 2008 10 01 Figure 19 Physical Data Units with Optional Built On Blower Packs ...
Page 104: ...10 30 Page 96 2008 10 01 Figure 20 Physical Data Units with Optional Built On Blower Packs ...