Bosch TKA 865. Operator's Manual download pdf (Page 50)

Cooling system

Properties of diesel engine for co-generation

Combined generation (co-generation) of power and heat makes sense only if the system is in continuous

operation. The cooling system must therefore be designed with particular care, since in continuous oper-

ation even the smallest defects may cause very serious damage.

When installing additional heat exchangers and associated pipes, ensure that the flow resistance in the

system is not too high, as this will cause the circulation of coolant to fall below the permissible value. Va-

lues for coolant circulation can be found in the engine data sheets.

Additional heat exchangers are to be arranged in such a way that no air pockets will develop.

As already mentioned, cooling systems must be designed as closed overpressure systems. In continuous

heavy−duty operation. the valves installed in the caps may fail after some time without this being noticed.

The system will then slowly lose pressure, which means that consequential damage to the engine may oc-

cur.

Consequently, we recommend running the system with hydrostatic pre−pressure. For this purpose the ex-

pansion tank is fitted 6 − 7 m above the engine (1 m head of water corresponds to 0.1 bar).

The expansion tank is to be fitted with a coolant level probe (see page 73) which will actuate the shut-off

device if the coolant level drops (burst hose).

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Bosch TKA 865. Operator's Manual Page 50