PAM Refrigeration recently delivered two unique packaged, ammonia, ice generators to Cape Town harbour for installation on a Russian trawler, Desert Diamond, fishing in South African waters for horse mackerel. The vessel Desert Diamond discharges its cargo either in Port Elizabeth or Cape Town, depending on the fishing.
Information revealed that the trawler has the capacity to freeze 170 tonnes of fresh fish every 24 hours and previously used a refrigerated sea water (RSW) system to pre-chill the fresh fish, but this proved inadequate and the owners opted to install the Pam Flow Ice Generators to increase production. The refrigeration capacity of each screw package is 225kW at -10/+35°C.
A single pump on each package, driven by a 2.2kw motor, sucks sea water from a header which also supplies the condenser and pumps the flow ice slurry to the pre-chilling tanks, which are located on the rear end of the trawler. The compact package measures 2.4 x 2.4 x 2.4m and has a small charge of only 60kg of ammonia. The packages are installed in an enclosure at mid ship on deck.
