automatically as its respective engines are started.
c.
The distance between condenser and engine shall be [[_____] m feet
] [as shown]. Unit shall be furnished complete with a matched
float and thermostatic trap installation. Air flow shall be from
the fan motor [upward] [downward] [inward] [outward] through the
condenser. 300 mm Twelve-inch lengths of flexible hose or pipe
shall be furnished for all inlet and outlet pipe connections. A
valved vent for release of noncondensible gases shall be provided.
Condenser shall be sized by the engine manufacturer for this
application. Auxiliary system coolant temperature shall not
exceed 80 degrees C 180 degrees F, with a maximum differential of
8 degrees C 15 degrees F. Temperature for the system shall be
maintained by regulating the steam pressure.
2.2.9.2
Water-Cooled Condenser
Unit shall be a shell-and-tube type rated for 30 degrees C 85 degrees F
entering water and 40 degrees C 105 degrees F leaving water. Unit shall be
furnished complete with a matched float and thermostatic trap installation
as well as a subcooler unit to reduce flashing of condensate. A valved
vent for release of noncondensible gases shall be provided.
2.2.10
Pressure-Operated Control Valve
The control valve shall be the butterfly type with maximum 60 percent full
open operating position for good control characteristics. Nominal rating
shall be with 7 kPa 1 psig pressure drop at 60 percent of full open
position. For use as a back pressure valve when there is no auxiliary
fired boiler, metal-to-metal seats which do not provide 100 percent shutoff
to condenser shall be provided. For use with an auxiliary fired boiler,
high temperature butyl or silicone rubber or EPDM seats for bubble-tight
shutoff to the condenser shall be provided. Valve operator shall be
[electric proportional operator with pressure control mounted internally]
[pneumatic with controller with proportional band, reset and filter
regulator mounted on operator]. Valve shall open on loss of air supply
pressure.
2.2.11
Auxiliary Boiler for Supplemental Firing
**************************************************************************
NOTE: Delete this paragraph if auxiliary fired
boiler is not required. Auxiliary boiler is
required when a constant source of heat must be
maintained during maintenance or overhaul of prime
movers or to supplement heating requirements during
peak demands which are beyond the capacity of the
heat recovery installation.
**************************************************************************
Boiler and related equipment shall be as specified in Section [_____].
2.2.12
Forced Circulation Pump
Where an engine-driven pump is not provided for jacket water circulation, a
separate electric motor-driven pump interlocked with engine operation shall
be provided as required by the engine manufacturer.
SECTION 15845A
Page 13
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