Seawater-ammonia exchangers

The second approach implies two seawater-ammonia exchangers. Two materials are in competition for the manufacture of these exchangers titanium and aluminium. Copper is excluded because of the presence of ammonia. 

There are many examples of the detrimental effects of decaying organic material in cooling systems, for instance, seaweed, barnacles, mussels, and shellfish accumulated in heat-exchanger systems. For unpolluted seawater, it normally suffices to measure the salinity or chlorinity, the pH, and perhaps the oxygen content. However, in the case of polluted seawater, it is often necessary to obtain additional data. These can include the concentrations of heavy metal ions, sulfide, and ammonia as well as the chemical oxygen demand (COD) and total organic carbon (TOC) values. 

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