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- Transformer Oil Cooler
- Oil coolers where environmental or mechanical damage should be avoided under all circumstances
- Process Coolers
Principle
The principle of the Double Tube cooler is fairly simple. The single wall between the 2 fluids is replaced by 2 walls with an intermediate circuit. Any damage in one of the tube walls will result in a filling of the intermediate circuit. This filling is detected and results in an alarm signal.
As alternative for the double tube cooler the use of a secondary circuit could be considered. This alternative however needs a second heat exchanger. This secondary circuit needs conditioned cooling water, extra pumps, piping valves etc. The required heat exchangers are larger due to an adverse LMTD (Logarithmic Mean Temperature Difference) and, as a consequence, more expensive as well as in investment as operation.
All design options used for single tube heat exchangers are also possible with the double tube construction, so different material combinations and cooler constructions are possible, depending on the fluids used.