background image

      

6   

   

   

For   a   high   temperature   (HT)   circuit,   provide   

6   dm

2

   of   

inlet   slots   per   100   kW

   heat   rejection.   

For   a   low   temperature   (LT)   circuit,   provide   

9   dm

2

   of   

inlet   slots   per   100   kW

   heat   rejection.      

The   area   of   the   

outlet   slots

   should   be   

80%

   of   the   inlet   

slots.   

   

Figure   4.   Examples   of   inlet   slots   in   a   hatch   (to   be   used   

as   inspection   opening/man   hole).   

   

   

Figure   5.   Maintain   a   closed   area   between   the   inlet   and   

outlet   slots   of   at   least   25%   of   the   hull   section.   

9.

 

In   case   these   slots   are   not   possible,   make   as   many   

openings   as   possible.   Position   (sea)   water   inlet   slots   as   
low   as   possible   and   outlet   slots   as   high   as   possible.   
Assure   a   closed   sea   chest   surface   between   the   inlet   

and   outlet   slots   of   at   least   25%   of   the   total   tube   length   
(see   fig.   5).   

When   in   doubt   contact   Duramax   Marine®   for   advice   
and   send   a   drawing   of   the   sea   chest.   

10.

 

All   materials   for   the   sea   chest,   including   the   top   plate   
and   the   (supplied)   mounting   frame,   should   have   at   
least   equal   thickness   as   the   rest   of   the   ship's   plating.   

11.

 

The   tube   bundle   is   made   of   copper   alloys.   These   
metals   are   more   noble   than   the   carbon   steel   sea   
chest.   Without   proper   protection,   this   may   cause   
severe   galvanic   corrosion   of   the   sea   chest   due   to   

galvanic   currents   between   the   tube   bundle   and   the   
sea   chest,   where   the   (sea)   water   serves   as   an   
electrolyte.   

To   protect   the   sea   chest   from   galvanic   corrosion   

all   

metal   areas   of   the   sea   chest   shall   be   well   preserved.   

Furthermore,   it   is   highly   recommended   to   

install   

sacrificial   anodes.

   

12.

 

Make   sure   that   the   space   above   the   box   cooler   allows   

for   sufficient   access   to   carry   out   installation,   
inspection,   cleaning   and   maintenance   (see   also   section   
6).   

Top   mounted   box   coolers   also   require   sufficient   space   
for   installation   and   retraction   of   the   tube   bundle.   

   

4.2.

 

WELDING   THE   MOUNTING   FRAME   IN   

POSITION   

After   welding   the   mounting   frame   is   part   of   the   
ship's   hull.   All   reinforcements,   stiffeners,   hull   
material   and   thicknesses   are   to   be   defined   by   the   
yard.

   

All   welding   shall   be   carried   out   according   to   the   
applicable   requirements   of   the   Classification   
Society's   Rules.   
Recommended   is   for   T-­‐joints   to   use   double   bevel   T-­‐
butt   welds   (see   fig.   9   and   10)   to   minimize   distortion.   
Avoid   damage   to   the   box   cooler.   Do   not   weld   on   or   
near   the   mounting   frame   when   the   box   cooler   is   
installed.   

If   a   mounting   frame   is   not   part   of   the   order,   use   the   bolt   
pattern   of   the   water   cover   as   a   drilling   template.   

1)

 

Move   the   wooden   crate   with   the   box   cooler   and   all   
related   parts   to   area   where   the   sea   chest   is   located.      

2)

 

Take   the   carbon   steel   mounting   frame   out   of   the   
wooden   case   (note   that   alternative   configurations   
exist,   see   section   4.3.1,   4.3.2   and   4.3.3).

   

Summary of Contents for Box Cooler

Page 1: ...HEAT EXCHANGE SYSTEMS Duramax Marine is an ISO 9001 2015 Certified Company Box Cooler Installation Manual...

Page 2: ...Do not install operate or service this box cooler without having read and fully understand all information enclosed in this manual...

Page 3: ...hest design 5 4 2 Welding the mounting frame in position 6 4 3 Mounting 7 4 4 Fixing the process piping 11 4 5 ICAF systems 13 5 COMMISSIONING AND OPERATION 14 5 1 Check the system for satisfactory in...

Page 4: ...n manual of the ICAF system may be supplied with the box cooler Study this manual as well and follow all relevant instructions 2 PRODUCT DESCRIPTION INTENDED USE WARRANTY 2 1 PRODUCT DESCRIPTION The p...

Page 5: ...ion 4 5 2 ICAF system Impressed Current Anti Fouling system 2 2 INTENDED USE The box cooler is custom built according to the order and the attached technical specifications Safe and trouble free use o...

Page 6: ...the total weight of the box cooler in kg 4 The minimum maximum design temperature Refer to the attached technical specifications for the values 5 The minimum maximum design pressure in barg 3 Refer t...

Page 7: ...n of the eyebolts must be adjusted with suitable washers Do not insert the point of a hook in an eyebolt but use a shackle Lift only by using all 4 eyebolts simultaneously see fig 2 Do not insert the...

Page 8: ...w the special sea chest to be installed see fig 3b 3 Ensure that the top plate of the sea chest is on or below the waterline when the ship is empty This is to make sure that the tube bundle is fully s...

Page 9: ...he tube bundle and the sea chest where the sea water serves as an electrolyte To protect the sea chest from galvanic corrosion all metal areas of the sea chest shall be well preserved Furthermore it i...

Page 10: ...ube bundle against paint Do not coat the cathode plates of the ICAF system when applicable 4 3 MOUNTING The box cooler can be mounted in two different ways From above top mounted see section 4 3 1 Fro...

Page 11: ...ating may reduce the lifetime of the box cooler and will accelerate galvanic corrosion of the sea chest 6 Position the supplied collar bolts in the appropriate bolt holes of the tube plate and fasten...

Page 12: ...inspect and clean the parts according to the instructions of section 4 3 1 3 Position the gasket that is used between frame 2 and the tube sheet on top of frame 2 Make sure the gasket and the gasket...

Page 13: ...any other agent when installing the SBR gasket 3 Lift the tube bundle refer to fig 2 until just below the header frame but leaving sufficient space to remove the eyebolts See 1 of fig 10c 4 Then take...

Page 14: ...oad and piping vibrations to the box cooler Install safety devices to prevent overpressure and overheating see section 4 4 2 4 4 1 Piping design Ensure that the piping is well supported independently...

Page 15: ...einforced graphite ring gaskets 6 Make sure the gaskets are properly centred and tighten up the stud bolts of the flanges alternate and crosswise to guarantee an even setting of the gaskets see sectio...

Page 16: ...lation Duramax Marine can supply the box cooler with an integrated ICAF system from Corrosion Water Control see fig 14a In that case the copper anodes are clamped to a frame that is fixed to the box c...

Page 17: ...to escape then close the vent valve 3 Allow the circuit to pressurize and open the return valve so the liquid can flow through 4 Regularly carry out the inspections of section 6 1 During the initial...

Page 18: ...cted values and are within the permissible design limits If the outlet temperature of the liquid is increasing throughout longer periods of time this may be an indication that the box cooler has becom...

Page 19: ...ces of the flanges 4 Inspect the interior for fouling or signs of corrosion It is not expected that internal cleaning of the tubes will be necessary because the liquid should be conditioned and circul...

Page 20: ...ith full characteristics of used water the materials of the box cooler and its use When required contact Duramax Marine for advice External cleaning of the tube bundle Excessive marine fouling will si...

Page 21: ...ent valve at the highest point to bleed off the air that is present in the system 2 Fill the box cooler through a feeder with a suitable non corrosive unheated liquid while the air vent is open Close...

Page 22: ...ng flanges not flat or face surfaces damaged see section 4 2 Re tighten the bolts see section 4 4 4 Contact Duramax Marine if this does not succeed pressure and or temperature too high see section 5 2...

Page 23: ...20 8 TECHNICAL SPECIFICATIONS Please refer to the technical specifications as supplied with the order documents...

Page 24: ...Bearings DX 490 Rudder Bushings DURAMAX HEAT EXCHANGE SYSTEMS DuraCooler Keel Coolers Duramax Demountable Keel Coolers Duramax BoxCoolers Duramax Plate Heat Exchangers DURAMAX IMPACT PROTECTION SYSTEM...

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