Air outlet temperature

Air outlet temperature. The individual air outlet temperatures from the coolers shown in Fig. 14.6 are... 

With TAi known and the air outlet temperature now estimated (TA2 = TAi + DTA), the log mean temperature DTM may be calculated. Refer to Table 5.1 for a review of DTM calculation. In the case of air coolers, the cold fluid is always the air side, which cools the process-side fluid. Ti is the process-side temperature and is always the highest of all the shown temperatures. Therefore, T - G should most likely be the greater temperature difference GTD. This is not true for every case, especially cases where there is limited airflow and therefore a large air-side temperature rise compared to other cases. You must therefore check to ensure you have chosen the correct temperature difference for these GTD and LTD values. 

Example For a material with product number = 10 and air inlet temperature of 500T, the evaporation rate is 53lb/hr, input Btu/lb evaporated = 1930, and the air outlet temperature is 180T. 

The particle size of the powders, which is affected by milk composition and the solid-fat content of the milk fat, also affects the suitability of powders for chocolate manufacture (Keogh et al., 2002). By increasing the spray nozzle size for the concentrate and increasing the air outlet temperature of the dryer, the particle size of milk powders can be increased (Keogh et al., 2004). This makes milk powders more suitable for chocolate manufacture. 

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