Audio amplifier radiator factory preferred Chong and letter Hardware Products

Radiator exothermic process is abstruse, and technical, the general situation is the natural convection heat transfer. And to many factors and natural convection heat transfer process, which mainly depends on the following points. Natural convection heat transfer radiator depends on the following: (1) the outer surface of the heat sink temperature difference between the indoor air △ t, we know the basic formula for the convective heat transfer:. Q = αF (tb-tn) = αF △ t wherein Q is heat transfer; α is the heat transfer coefficient; tb outer surface temperature of the heat sink; tn indoor air temperature; △ t to the outer surface of the radiator and the room air temperature difference; F to heat the outer surface area. Obviously, △ t greater, the more heat transfer, so that the hot air near the outer surface and away from the outer surface of the density difference between cold larger, and thus the more intense natural convection, Natural convection heat transfer is also the more intense. (2) the outer surface of the heat sink area size F convective heat transfer can be seen from the above basic formula, other conditions are the same, the outer surface of the radiator to pass air heat Q F proportional to its area. Natural convection heat is relying on these occur, so the heat transfer area F of size but also on the strength of natural convection great influence, the greater the external surface area, the greater the natural convection heat transfer. (3) air along the outer surface of the heatsink natural convection process is divided into three phases, namely laminar phase, the transition phase, turbulent phase in the laminar phase mainly by heat conduction heat flow between the layers of the transfer. Therefore, heat transfer coefficient. Relatively low, the air temperature is not, the flow rate is small. Entered the second stage, air is continuously heated by the outer surface of the heat sink temperature increased a lot, buoyancy increases, the flow rate increases. Laminar sub-layer thickness increases to further increase the flow rate of thinning, such that the bottom layer flow resistance gradually decreases. Therefore, at this stage α is gradually increasing. (4) the direction of the exothermic heat of direction, that direction of heat flow. Heated by natural convection of buoyant fluid is achieved, if the man at the top by blocking heat flow, is not conducive to natural convection heat transfer. As can be seen from the radiator heat exchange process and its characteristics, plus the radiator cap must comply with the heat sink of the process, but also to ensure that the heated air in the heating room normal convection cycle, otherwise it will affect the radiator heat dissipation.