Cooling Devices

Panels then move into a cooling device, normally a wheel or rack, where they are held individually and air is circulated between them to remove the majority of heat remaining in the boards after pressing. It is desirable to reduce the average board surface temperature to about 55°C. This temperature is sufficient to complete the cure of adhesive in the core of the board. The heat also helps to redistribute moisture uniformly within the boards, because the board surfaces are drier than the core when the boards come out of the press. Warm boards are normally stacked for several hours to a day to allow for resin cure and moisture equalization. 

Melting Smoke and particulates, fume afterburner, gas-cooling device and... 

Free floating In this ca.se the indoor temperature is left free to fluctuate without any mechanical cooling device. 

Figure 12.33 shows the velocity distribution down through the full length of the exhibition hall. It is quite obvious that the flow is a stratified flow with the highest velocity in the occupied zone. Smoke measurements show that the cold air from the cooling device accelerates down into the occupied zone, due to gravity, and moves horizontally as a stratified flow along the floor in the restaurant and exhibition section. 

Measurements show that the velocity has a fairly constant level in the occupied zone even far downstream from the wall with the cooling device. The flow is plane, and general experience indicates that the velocity in a plane stratified flow is constant and independent of the distance from the inlet device. Prediction of the flow by coinpurational fluid dynamics shows a similar velocity level in the hall. - The full-scale measurements shown in Fig. 12.33 indicate a very low velocity in most of the hall due to the practical difficulties in obtaining a correct load during the full-scale experiment. 

Water chiller A water-cooling device operating either by the direct expansion of a refrigerant by an absorption system or by evaporative cooling. 

Brine maybe pumped to each cooling device, and the flow controlled by means of shut-off or bypass valves to maintain the correct temperature (see Figure 12.5)... 

With the advantages of factory-built packaged cooling devices, this list cannot be exhaustive. 

The thermal management of the battery necessitates heaters and cooling devices together with temperature sensors. Both oil... 

Consider an experiment in which an air-cooled device is being tested and it is desired to determine the rate of heat transfer Q to the cooling air (ASME 2000). This can be accomplished by measuring the mass flow rate m, and the inlet and outlet air temperatures, Tin and Tout, and computing ... 

The flow velocity, pressure and dynamic viscosity are denoted u, p and fj and the symbol (...) represents an average over the fluid phase. Kim et al. used an extended Darcy equation to model the flow distribution in a micro channel cooling device [118]. In general, the permeability K has to be regarded as a tensor quantity accounting for the anisotropy of the medium. Furthermore, the description can be generalized to include heat transfer effects in porous media. More details on transport processes in porous media will be presented in Section 2.9. 

Type of Cooling Device Windage Loss as Percentage of System... 

The advantages of measuring at very low temperatures are well established [4], Because of the increased speed of data collection, it now becomes feasible to consider the use of liquid helium as a cryogen. A prototype open-flow helium cooling device using mainly off-the-shelf components has been developed [3],... 

Most of the work in our laboratory has been done using specially designed cells that are incorporated in a rather simple cooling device. In working with polycrystalline metal foils, a cell design as pictured in Fig.l has been used. Metal... 

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