Quote Originally Posted by gwapa View Post
The fish Plant is located at sea coast at the Caribbean . There are a lot of warm tropical sea water (24 ºC). The Sweet water is low. Use saltwater is very complicate. The atmospheric air is warm . But to defrost 60 Tm of fish in 24 h you need a lot of heat and also blow the air through to frosted fish . Additional the production people require the temperature in the room be 5º C and 85 % RH. So the fan could be of the very high capacity and you will raise the room temperature.
At the first glance I though use hot gas, but the system does not have enough heat rejection to do that .
May be he most simple thing is to install fancoils with a closed water circuit to keep the room at 5ºC
Do you agree ?
Gwapa
"Additional the production people require the temperature in the room be 5º C and 85 % RH. So the fan could be of the very high capacity and you will raise the room temperature." If you have a lot contact heat exchanger surface between the product and the air I don't think so.

"May be he most simple thing is to install fancoils with a closed water circuit to keep the room at 5ºC"
If you don't want to use sea water directly (why?) you can use a titatium or cooper nickel heat exchanger to exchange between the sea water and a dry cooler, with sweet water, and this sweet water will warm up the air that passes through the product.