A single effect evaporator is used to concentrate 10 000 kg / hr of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 15 ° C. The evaporator is operated on Steam (80% quality) at 143.27 kPa. The vacuum in the evaporator allows the juice to boil at 75 ° C. The specific heat of the dilute material is 4.1 kJ / (kg ° C) and the concentrate product is 3.1 kJ / (kg ° C). Count it (a) Steam demand rate = kg / hour. b. Steam economy when condensate temperature is released at 75 ° C. = (kg of water evaporated / kg of steam

1. In the process of air conditioning in a humidifier, the air at a dry bulb temperature of 20 °C and 25% RH increases its RH to 40%. Determine the amount of moisture added in the humidifier per kg of dry air. = (kg water/kg air).   2. The air has a dry bulb temperature of 34 °C and a wet bulb temperature of 22°C. The liquid is heated in a heater so that the dry bulb temperature increases to 80 °C. Then the air is passed through the corn kernels to dry. The air coming out of the corn kernels is at bulb temperature. dry 55 °C Then this air is passed to the dehumidifier to reduce its RH to 10%. Draw the course of the air change process on a psychrometric diagram. The rate of air flow through the corn kernels and dehumidifier is 4.0 m/s and the cross-sectional diameter of the pile is 0.7 m.   a) Determine the amount of water content lost from the pile of corn kernels (in grams of water/second)   b) Determine the amount of water content lost from the air when passing through the…

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A single effect evaporator was used to concentrate 8000 kg / hr of tomato juice from 5% total solids to 30% total solids. The juice enters the Evaporator at 20 ° C. The evaporator is operated on Steam (80% quality) at 143.27 kPa. The vacuum in the evaporator allows the juice to boil at 75 ° C. The specific heat of the dilute material is 4.1 kJ / (kg ° C) and the concentrate product is 3.1 kJ / (kg ° C). Count it (a) Steam demand rate = Answerkg / hour. b. Steam economy when condensate temperature is released at 75 ° C. = Answer(kg of water evaporated / kg of steam)