Freight Surcharges. BAF refers to floating part of sea freight charges which represents additions due to oil prices. Usually BAF charges are determined by Carrier Conferences to be applicable for a certain period on a certain trade route. These Carrier Conferences are seen as a cartel for fixing prices.
Heat transfer. Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes.
Conduction is when heat is transferred through a material by passing thermal energy from molecule to molecule (from collisions). An example is when you heat up one end of a pa â¦ n and the handle gets hot a little later. Convection is when, as they say, heat rises.onduction:-   Conduction is the transfer heat from a hotter to a colder body by  vibrating.   Convection:-   Is the main heat transfer mechanism in fluids.