7.1.1 A minimum
of two independently operated circulation pumps are to be installed.
One of the pumps may be used for other services, such as a general
service pump.
7.1.2 The
capacity of each pump should be sufficient to supply each container
at the required flow rate with an excess capacity of at least 10 per
cent. This required flow rate should be obtained from the container
manufacturer.
7.1.3 The
fresh water system is to provide sufficient flow and even distribution
to each container location. This is to be achieved using all possible
combinations of fresh water pumps and dedicated refrigerated container
cells.
7.1.4 The
temperature of the cooling water is to be maintained in accordance
with the container manufacturer's recommendations.
7.1.5 Flexible
hoses are to be utilised for connecting the water supply and return
pipes. The connectors on the ends of the flexible hoses are to be
of a type that self-closes on disconnection. Adequate valves are to
be provided to allow isolation of each cargo hold sub-circuit in the
event of a leak or pipe fracture.
7.1.6 A minimum
of two fresh-water to sea-water heat exchangers are to be provided.
Each is to be rated at 100 per cent of the required cooling duty at
the notation conditions. The second heat exchanger may be a standby
or part of a common central system such as that used for main engine
cooling duties. The heat exchangers are to be supplied by a minimum
of two separate sea-water pumps.