Regarding the issue of seawater discharge temperature
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This post was last edited by *ezhongxu on 2016-9-1 at 15:44. The turbine air coolers in our company are cooled using seawater; what is the maximum allowable discharge temperature for this seawater? Which standard is the relevant one?
It’s at sea now; there should be no problem
No, **the environmental protection authorities have requirements regarding emission temperatures and water quality**
There must be requirements regarding water quality, but probably not regarding temperature. After all, it’s not possible to raise the temperature of seawater – by how much would that even be?
The water quality of the seawater return water used for the turbine air coolers generally does not change significantly; at most, the conductivity may be slightly higher, depending on the quality of the steam.
Our surface coolers use secondary seawater; the quality of that water is uncertain, and it’s not impossible that primary seawater could leak in as well. The key factor is temperature – what is the discharge temperature?
In accordance with the requirements of the **Sea Water Quality Standard GB3097-1997, the temperature increase of seawater caused by human activities shall not exceed 1°C in summer compared to the local temperature； In other seasons, it should not exceed 2°C locally
What does secondary seawater mean? Are there any seawater reservoirs as well?
The seawater that has undergone heat exchange and is then put to use is called secondary seawater
I see some that use seawater and circulating water for heat exchange