100-120. A 3387 kg of moisture per hour is being removed from a material by a drier and the air leaving it has a humidity ratio of 0.02345 kg of moisture per kg of dry air. The outside air is initially at 16°C dry bulb and has a relative humidity of 50%. The air is heated to a temperature of 69°C by steam coils and between the heater and the drier air inlet a drop of 9°C occurs in the air temperature. How much steam is required in kg/s if the steam supplied is at 138 kPa and 0.97 quality?

100-120. A 3387 kg of moisture per hour is being removed from a material by a drier and the air leaving it has a humidity ratio of 0.02345 kg of moisture per kg of dry air. The outside air is initially at 16°C dry bulb and has a relative humidity of 50%. The air is heated to a temperature of 69°C by steam coils and between the heater and the drier air inlet a drop of 9°C occurs in the air temperature. How much steam is required in kg/s if the steam supplied is at 138 kPa and 0.97 quality?

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

air flowing at 2 kg / s has a dry bulb temperature of 50 ° C and a wet bulb temperature of 30 ° C, mixed with air flowing at 3kg / s at 25 ° C and a relative humidity of 70%. Using the psycometry chart determine the ratio, enthalpy and temperature of the dry ball
Show step by step solution
use the principles of psychrometrics
An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and an evaporative cooler. Air enters the heating section at 12°C and 50 percent relative humidity at a rate of 20 m³/min, and it leaves the evaporative cooler at 25°C and 40 percent relatively humidity. Determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler.
The air in a house is at 19°C, 59% relative humidity, and total pressure 89kPa. If air is cooled at constant pressure, the temperature at which moisture begins to codense is:
A room contains 100 kg of dry air and 1.1 kg of water vapor at 26°C and 1 atm total pressure. The relative humidity of air in the room is
The small business uses a forced-draught cooling tower for cooling the water of its refrigeration and air conditioning systems. The fan power input is 3 kW. The air enters the cooling tower at 17.5 C and a relative humidity of 50 %. The water from the steam plant enters at 54C and is sprayed into the tower at a rate of 10 kg/s. The water leaving the tower is at a temperature of 25 C. The air leaves the tower at 35C and is saturated. Assume that the whole process occurs at a constant pressure of 85 kPa. Calculate the following: (a) The airflow required in [m3/s]. (b) The make-up water required in [kg/s]
An air conditioning system, shown schematically below, supplies air at the rate of 4 kg/s to a space maintained at a db-temperature of 27°C and relative humidity of 50%. The sensible and latent heat loads on the space are 46 kW and 20 kW respectively. Outdoor air at 35°C db-temperature and 24°C wb-temperature is introduced at the rate of 1.1 kg/s. The relative humidity of the air leaving the cooling coil is 90%. The pressure is constant at 101.3 kPa. Determine:the supply air temperature in °Cthe supply air relative humidity in %the mass flow rate of the air that bypasses the cooling coil in kg/sthe refrigeration capacity of the cooling coil in kW
Air at 330 K and its humidity is 0.005 is used to dry a wet solid up to its relative humidity reached to 70%, then reheated to 330 K and reused to drying again up to its relative humidity reached to 70%. The final dry-bulb and wet-bulb temperatures of air are 308 K and 303.5 K respectively 305 K and 303.5 K respectively 308 K and 300 K respectively 302 K and 297 K respectively