6 BlueCool S-Series
4.4.3 Heating operation mode
Heat can also be generated with the BlueCool S-Series air-condi-
tioning system. A 4-way reversing valve is installed in the system
for this purpose. As a result, the condenser becomes an evapora-
tor and vice versa. The sea water heat exchanger (now evapora-
tor) takes available heat away from the sea water which is then
transferred to the refrigerant. The air heat exchanger becomes the
condenser and gives off the condensation heat to the cabin air
and heats it up to 45/50 °C.
Notes
Heating mode becomes inefficient when the sea wa-
ter temperature drops to below 6 °C as sufficient
heat can no longer be taken from the cold sea wa-
ter. The interior air then cannot be heated sufficient-
ly.