2. A spray drier is used to dry skim milk to a final moisture content of 5.00%. The air entering the drier is 110°C, is heated from ambient air at 26.0°C and 80.0% RH. The flow rate of hot air entering the dryer is 1000 m³ dry air/min. The skim milk enters the dryer at 45.0°C with 55.0% moisture content and the exit temperature is 55.0°C. The specific heat of product solids is 2.00 kJ/kg dry solid-°C. The heated air leaves the system at 5.00°C above the product temperature. Determine: a. the %RH of air leaving the dryer; and b. the production rate of the moist product leaving the dryer. (Note: Obtain necessary properties of air using the psychrometric chart given to you; All moisture content is on wet basis)

2. A spray drier is used to dry skim milk to a final moisture content of 5.00%. The air entering the drier is 110°C, is heated from ambient air at 26.0°C and 80.0% RH. The flow rate of hot air entering the dryer is 1000 m³ dry air/min. The skim milk enters the dryer at 45.0°C with 55.0% moisture content and the exit temperature is 55.0°C. The specific heat of product solids is 2.00 kJ/kg dry solid-°C. The heated air leaves the system at 5.00°C above the product temperature. Determine: a. the %RH of air leaving the dryer; and b. the production rate of the moist product leaving the dryer. (Note: Obtain necessary properties of air using the psychrometric chart given to you; All moisture content is on wet basis)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A spray drier is used to dry skim milk to a final moisture content of 5.00%. The air entering the drier is 1 IOOC, is heated from ambient air at 26.00C and 80.0% RH. The flow rate of hot air entering the dryer is 1000 m3 dry air/min. The skim milk enters the dryer at 45.00C with 55.0% moisture content and the exit temperature is 55.00C. The specific heat of product solids is 2.00 kJ/kg dry solid-OC. The heated air leaves the system at 5.000C above the product temperature. Determine: a. the production rate of the moist product leaving the dryer. (Note: Obtain necessary properties of air using the psychrometric chart given to you; All moisture content is on wet basis)
A spray drier is used to dry skim milk to a final moisture content of 5.00%. The air entering the drier is 1 IOOC, is heated from ambient air at 26.00C and 80.0% RH. The flow rate of hot air entering the dryer is 1000 m3 dry air/min. The skim milk enters the dryer at 45.00C with 55.0% moisture content and the exit temperature is 55.00C. The specific heat of product solids is 2.00 kJ/kg dry solid-OC. The heated air leaves the system at 5.000C above the product temperature. Determine: a. the %RH of air leaving the dryer
Pls. Answer thank you! A dryer is to deliver 1000 kg/hr of cassava with 2% moisture and 20% moisture in the feed. Determine the mass of air required if change in humidity ratio is 0.0165.
Exercise 17.5 Air is being drawn over the cold surface of the cooling coil of an air conditioning unit. If 10 m/min enters the air conditioner, calculate the mass flow rate of the condensed moisture, given that the air enters at 20°C and 70% relative humid- ity and exits at 12°C dry bulb temperature and 90% relative humidity. Calcu- late the refrigeration capacity of the coil in W and Btu/h. Solution Step 1 Draw the process diagram: ma ma W; H. H
8.2 A single-effect evaporator is being used to concentrate 10,000 kg/h of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 15°C. The evaporator is operated with steam (80% quality) at 143.27 kPa. The vacuum inside the evaporator allows the juice to boil at 75°C. Calculate (a) the steam requirements and (b) steam economy for the process. Assume the condensate is discharged at 75°C. The specifi c heat of the liquid feed is 4.1 kJ/(kg°C) and the concentrated product is 3.1 kJ/(kg°C). 8.3 A four-effect evaporator is being considered for concentrating a fruit juice that has no appreciable boiling-point elevation. Steam is available at 143.27 kPa, and the boiling point of the product in the fourth effect is 45°C. The overall heat-transfer coeffi cients are 3000 W/(m 2 °C) in the fi rst effect,2500W/(m2 °C) in the second effect, 2100W/(m2°C) in the third effect, and 1800W/(m2°C) in the fourth effect. Calculate the boiling-point temperatures of the…
A dryer is to deliver 1,000 kg/h of palay with final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 30 oC dry bulb and 20 oC wet bulb. The dryer is maintained at 45oC while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPa, determine the following: a.) Palay supplied to the dryer in kg/h. b.) Temperature of the hot humid air from the dryer in oC. c.) Air supplied to dryer in cu m/h. d.) Heat supplied by the heater in k W. e.) Steam supplied to heater in kg/h.
A countercurrent tunnel dryer is used to dry apple slices from an initial moisture content of 65% to 5% (wet basis). Hot air enters at 95 ° C with 1% RH, and exits at 52.0 ° C. If the product temperature along the dryer is 20 ° C and the solid specific heat of the product is 2.2 kJ / (kg ° C), determine the rate of hot air required to dry the wet product at a rate of 160 kg / hr. Determine the RH of the dryer exhaust air. a. Drying air rate (ma) = kg / hr. b. RH of dryer exhaust air =%
QUESTION 1 temperature of 200°C from feed water of 5°C. The steam has a dryness fraction of 0,9 when leaving the evaporator. The boiler uses coal with a calorific value of 31MJ/ka and the steam leaves the plant at a rate of 8kg per kg fuel burnt. Determine: 1.1.1 the boiler efficiency; THER MOTTADE ETA 1.1.2 the equivalent evaporation from and at 100°C;
A dryer is to deliver 1,000 kg/hour of palay with a final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 32°C dry bulb and 21°C wet bulb. The dryer is maintained at 45°C while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPaa, determine: a) amount of palay supplied to the dryer in kg/hr and the temperature of the hot humid air from the dryer in °C. b) air supplied to the dryer in m3/hr. c) heat capacity of the heater in kW; and d) steam supplied to the heater in kg/hr.
The pressure at which the steam should be reheated.Notes: Assume the steam is reheated to the inlet temperature of the high-pressure turbine. The moisture content of the steam at the exit of the low-pressure turbine is not to exceed 9.5%
A countercurrent tunnel dryer was used to dry the ape slices from an initial moisture content of 70% to 10% (wet basis). Hot air enters at 95 C with 1% RH, and exits at 60.0 C. If the product temperature at drying length is 20˚C and the specific heat of the product solids is 2.2 kJ / (kg ˚C), determine the rate of hot air required to dry the wet product at a rate of 240 kg / hour. determine the RH of the drying air outlet. a. drying air rate (ma) = kg / hr b. RH of dryer exhaust air = %
Pls. Answer thank you! The inside design conditions for a conditioned space are 20.1°C dry-bulb and 15.2°C wet-bulb. The air temperature increases 10.6°C as it passes through the conditioned space. The apparatus dew point is 11.9°C. The heat transfer rate is 456 Kw. What is most nearly the volumetric flow rate of the air passing through the space?