Question

In: Mechanical Engineering

Using psychrometric chat to answer the questions below: 15 m3/min humid air is to be cooled...

Using psychrometric chat to answer the questions below:

15 m3/min humid air is to be cooled using an air conditioning unit. The inlet air is at 35 °C and 60% relative humidity and should be cooled to 18 °C, at which point it will be saturated.

a) Below which temperature will condensation start occurring?

b) How much water will have condensed if cooled to 18 C (mw,out)?

c) Determine the heat removal, Qout, using the first law of thermodynamics.

Solutions

Expert Solution


Related Solutions

A window-mounted air conditioner supplies 19 m3/min of air at 15°C, 1 bar to a room....
A window-mounted air conditioner supplies 19 m3/min of air at 15°C, 1 bar to a room. Air returns from the room to the evaporator of the unit at 22°C. The air conditioner operates at steady state on a vapor-compression refrigeration cycle with Refrigerant 22 entering the compressor at 4 bar, 10°C. Saturated liquid refrigerant at 11.5 bar leaves the condenser. The compressor has an isentropic efficiency of 70%, and refrigerant exits the compressor at 11.5 bar. Determine: (a) the compressor...
A window-mounted air conditioner supplies 29 m3/min of air at 15°C, 1 bar to a room....
A window-mounted air conditioner supplies 29 m3/min of air at 15°C, 1 bar to a room. Air returns from the room to the evaporator of the unit at 22°C. The air conditioner operates at steady state on a vapor-compression refrigeration cycle with Refrigerant 22 entering the compressor at 4 bar, 10°C. Saturated liquid refrigerant at 9 bar leaves the condenser. The compressor has an isentropic efficiency of 70%, and refrigerant exits the compressor at 9 bar. Determine: (a) the compressor...
Humid air is enclosed in a 5.00-liter flask at 40.0°C. The flask is slowly cooled. When...
Humid air is enclosed in a 5.00-liter flask at 40.0°C. The flask is slowly cooled. When the temperature reaches 20.0°C, drops of moisture become visible on the flask wall. Although the pressure in the flask changes when the temperature drops, it remains close enough to 1 atm for the psychrometric chart to provide a close representation of the behavior of the system throughout the process. Use a psychometric chart to determine the relative humidity, absolute humidity, and wet-bulb temperature of...
Humid air at 155 kPa, 40°C, and 70 percent relative humidity is cooled at constant pressure...
Humid air at 155 kPa, 40°C, and 70 percent relative humidity is cooled at constant pressure in a pipe to its dew-point temperature. Calculate the heat transfer, in kJ/kg dry air, required for this process. Use data from the tables. The heat transfer is  kJ/kg dry air.
Answer the following questions using the steam tables, psychrometric tables, Antoine equation or other appropriate method....
Answer the following questions using the steam tables, psychrometric tables, Antoine equation or other appropriate method. 1. Neon has is kept at a pressure of 1510kPa and a temp of -220°C. What will be the percent error in calculating the volume if it is assumed to be ideal. 2. What is the temp of water in °C when the vapor pressure is 27.3psia?
3) A vortex tube receives 0.3 m3/min of air at 600 kPa and 300 K. The...
3) A vortex tube receives 0.3 m3/min of air at 600 kPa and 300 K. The discharge from the cold end of the tube is 0.6 kg/min at 245 K and 100 kPa. The discharge from the hot end is at 325 K and 100 kPa. Determine the irreversibility.
Pease answer the questions below: If n = 15, ¯xx¯ = 50, and s = 15,...
Pease answer the questions below: If n = 15, ¯xx¯ = 50, and s = 15, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population. Give your answers to three decimal places. < μ < 55 randomly selected students were asked the number of pairs of shoes they have. Let X represent the number of pairs of shoes. The results are as follows: # of Pairs of Shoes 4 5 6...
A hot silver plate is having its upper surface cooled by air forced convection of 15...
A hot silver plate is having its upper surface cooled by air forced convection of 15 °C with heat transfer coefficient of 220 W/m.K. The 10-cm thick plate (mass density ρ=8530 kg/m3, Cp=380J/kg.K, k=110 W/m.K, and α=33.9×10-6 m2/s) has a uniform initial temperature of 650 °C, and the bottom surface of the plate is insulated. (a) calculate the Bi number and determine whether the lumped capacitance method can be used. (2 points) (b) Determine the temperature at the center plane...
A two stage, single-acting compressor has a free air delivery of 4.2 m3/min when the ambient...
A two stage, single-acting compressor has a free air delivery of 4.2 m3/min when the ambient condition is 1.013 bar, 15oC. • The suction pressure and temperature are 0.98 bar and 32oC respectively. • The air is compressed to 16 bar according to the law pv1.3 = C. Assuming that the compressor is designed for minimum work with complete intercooling, calculate the indicated power required to drive the compressor.
Answer the questions below using the following information on a firm:
Answer the questions below using the following information on a firm: Output (Quantity) Total Cost 0 $50 1 60 2 80 3 110 4 150 5 200 6 260 7 330 8 410 What is average total cost at Q=7? What is marginal cost at Q =7? Is this firm operating under increasing or diminishing returns at Q=7? Why? Say this firm is a perfect competitor. If the market price for its product is $ 60, at what output level...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT