1. Consider an ammoni/thecol evaporating chiller is the refrigerant, and ethylene glycol is the chilling fluid The evapo

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1 Consider An Ammoni Thecol Evaporating Chiller Is The Refrigerant And Ethylene Glycol Is The Chilling Fluid The Evapo 1 (44.73 KiB) Viewed 12 times

1. Consider an ammoni/thecol evaporating chiller is the refrigerant, and ethylene glycol is the chilling fluid The evaporator chinthylene col to 3 C 121 ) ing a 20% solution freeting temperature of 10 C114) to be retrofitted to chill the the col to 40% freeing tormperature of 26 "SL-15 Simultaneously, the evaporating temperature of the morefrigerant of the evaporator to be dropped from 100(1497.2001 to -35°C (-13 7), 1511 TARE Ouvi T C. 5.30 Use the above data for Temperature, Strength (aka concentration of ethylene glycol before and after the changes. Compute the effect of these changes on the heat transfer coefficients imide and outside of the tubes of the evaporating chiller. For the tube-side Heat Transfer Coefficient (HTC) recall the correlation of Distus-Boelter ID -0.023 DO Mv 13(e)" (Egn. 11 Also, the below figure shows the HTC Heat Transfer Coefficient for pool boiling from a borizontal cylinder Station pois Bolling cocito 40 3020_0 100 200 300 400 Het LW 600 3.22 STORA 300 200 100 Saturation present 500 100 1500 2000 200 000 Bolling co. W FIGURE 661 Here for long Compute/address a. (Egn. 1) above b. For a heat flux of "10 kW/m2, use the diagram above to obtain the ammonia de boiling HTC (W/m2 Kvalues, before (when the ammonia saturation presures 2017 and after (when the ammonia saturation pressure is 151 Pa) the changes HTC ammoniaat 290 Pa = ? W/m2K HTC ammonia t 151 Pa 7 W/m2K