Question

In: Mechanical Engineering

2. An engineer doing an audit finds that liquid water from a process enters the cooling...

2. An engineer doing an audit finds that liquid water from a process enters the cooling tower at 80 F and with a volumetric flow of 25 gpm and exits at 70 F. Air enters the tower at 80 F and relative humidity of 70% . Air exits the tower at 90 F and 90% relative humidity. The tower does not use make up water.

Determine:

a. The air inlet and outlet conditions in the table

Condition

Tdb

(F)

φ

W (lb water/lb air)

H

(Btu/lb)

V ft³/lb)

inlet(air)

80

70

outlet( exit)

90

b. Required air flow (cfm)
c. Amount of water at the outlet (not equal to the inlet) (gpm).
d. Heat removed to water

Expert Solution

samet mamat answered 2 years ago

As a manufacturing engineer, you are required to decide on the machine tool and cooling liquid...

As a manufacturing engineer, you are required to decide on the machine tool and cooling liquid for a stainless steel automotive part. Aided with a block diagram of a machine tool, briefly explain the overview of the machining process including the justification of your parameter selections

A liquid mixture containing ethanol (55.0wt%) and the balance water enters a separation process unit at...

A liquid mixture containing ethanol (55.0wt%) and the balance water enters a separation process unit at a rate of 90.5 kg/s. A technician draws samples of the two product streams leaving the separator and analyzes them with a gas chromatograph, obtaining values of 86.2wt% ethanol (product stream 1) and 10.9% ethanol (product stream 2). The technician then reads a manometer attached to an orifice meter mounted in the pipe carrying product stream 1, converts the reading to a volumetric flow...

In an industrial cooling process, water is circulated through a system. If water is pumped with...

In an industrial cooling process, water is circulated through a system. If water is pumped with a speed of 4.00 m/s under a pressure of 6.70 × 105 Pa from the first floor through a 3.70-cm diameter pipe, what will be the pressure on the next floor 3.90 m above in a pipe with a diameter of 2.00 cm?

A sample of cooling liquid containing ethylene glycol and water is brought to your lab. The...

A sample of cooling liquid containing ethylene glycol and water is brought to your lab. The cooling tower contains 2,500 tons of this coolant to keep the chillers at an oil refinery working properly. It is critical that the concentration of the ethylene glycol be maintained at a concentration of 44.0±0.5%(w/w), to prevent freezing and transfer the heat properly. Since it’s late and an unexpected cold front has the plant manager worried, you decide to use the refractometer to run...

Distillation is one of the important unit operations in chemical process. It is a process of separating a component from its liquid mixture, which involves heating and cooling process.

Distillation is one of the important unit operations in chemical process. It is a process of separating a component from its liquid mixture, which involves heating and cooling process. There are various types of distillation methods, such as simple distillation, fractional distillation, steam distillation and vacuum distillation. Based on the above description, answer the following questions: Question 1 Identify three (3) factors to be considered in selecting a suitable distillation process. Question 2 Distillation may cause incomplete separation or partial separation of a component in...

Water specimens are taken from water used for cooling as it is being discharged from a...

Water specimens are taken from water used for cooling as it is being discharged from a power plant into a river. It has been determined that as long as the mean temperature of the discharged water is at most 150°F, there will be no negative effects on the river's ecosystem. To investigate whether the plant is in compliance with regulations that prohibit a mean discharge water temperature above 150°F, researchers will take 50 water specimens at randomly selected times and...

A wet cooling tower is to cool 25 kg/sec of cooling water from 40oC to 25oC...

A wet cooling tower is to cool 25 kg/sec of cooling water from 40oC to 25oC at a location where the atmospheric pressure remains constant at 97 kPa. Atmospheric air enters the tower at 25oC and 65% relative humidity and leaves saturated at 35oC. Neglecting the power input to the fan, determine the mass flow rate of the required makeup water.

1.Water samples were taken from water used for cooling as it was being discharged from a...

1.Water samples were taken from water used for cooling as it was being discharged from a power plant into a river. It has been determined that as long as the mean temperature of the discharged water is at most 150 F, there will be no negative impact on the river's ecosystem. To investigate whether a plant is in compliance with regulations that prohibit a mean discharge water temperature above 150 F, researchers took 50 water samples at randomly selected times...

Saturated liquid water at 1 MPa enters a D = 5 cm pipe at a rate...

Saturated liquid water at 1 MPa enters a D = 5 cm pipe at a rate of m(dot) = 2 kg/s. Heat is transferred to the water at a rate of Q(dot) = 5000 kW. The exit is at 1 MPa pressure. (a) Neglecting kinetic energy, calculate the temperature at the pipe exit. (ans = 400◦C) (b) Using your answer in a), calculate the exit velocity of the water. (ans = 312 m/s) (c) Based upon your answer, should kinetic...

Describe the process of performing an external audit in an organization doing strategic planning for the...

Describe the process of performing an external audit in an organization doing strategic planning for the first time. Your response should be at least 200 words in length.