A chilled-water heat-exchange unit is designed to cool 5 m3/s of air at 100 kPa and...

A chilled-water heat-exchange unit is designed to cool 5 m3/s of air at 100 kPa and 30°C to 100 kPa and 18°C by using water at 8°C. Determine (i) the maximum water outlet temperature and (ii) the total power consumed in KW-h, if the heat exchanger operated non-stop for 21 days. Assume the mass flow rate of the water is 2 kg/s.

Expert Solution

+

samet mamat answered 1 month ago

A double pipe heat exchanger is to be designed to cool 5 gal/min of hot oil...

A double pipe heat exchanger is to be designed to cool 5 gal/min of hot oil from 250°F to 120°F using 10 gal/min of cooling water available at 70°F. The heat exchanger is to consist of sections of 0.75 inch 16 BWG copper tubing inside 1.5 inch 16 BWG tubing; the water flows in the annular space. The shell-side heat transfer coefficient for this system is known to be 737 Btu/hr×ft2×°F. a) Estimate the required length of the countercurrent exchanger,...

A 200 litre tank initially contains water at 100 kPa and a quality of 1%. Heat...

A 200 litre tank initially contains water at 100 kPa and a quality of 1%. Heat is transferred to the water, thereby raising its pressure and temperature. At a pressure of 2 MPa, a safety valve opens, and saturated vapour at 2 MPa flows out. The process continues, maintaining 2 MPa inside until the quality in the tank is 90%, then stops. Determine the total mass if water that flowed out and the total heat transfer. *I’ve seen others have...

3) Air enters a compressor at 2 m / s, 20 ° C and 100 kPa...

3) Air enters a compressor at 2 m / s, 20 ° C and 100 kPa pressure, exits at 50 m / s, 900 kPa pressure and 200 ° C. Make sure that the power consumed by the compressor is 500 kW. The outlet cross-section diameter of the compressor is 10 cm. (Neglect the change in potential energy.) (15 points) CALCULATE THE AMOUNT OF HEAT?

An air conditioning unit, where water condensation is allowed, cools 9,791 m3 / min of humid...

An air conditioning unit, where water condensation is allowed, cools 9,791 m3 / min of humid air from 40 ° C and 50% relative humidity to 15 ° C. The total pressure is 1 atm. Calculate the heat removed in the cooling, answer in kW.

1000 m3 of moist air at 101 kPa and 25 °C with a dew point of...

1000 m3 of moist air at 101 kPa and 25 °C with a dew point of 11 °C enters a process. The air leaves the process at 98 kPa with a dew point of 58 °C. Assume ideal gases. (a) Draw and label a flowsheet for the process. b) What is the mole fraction of water in the air entering the process? Leaving the process? (c) How many moles of water are added to or removed from the 1000 m3...

Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The...

Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The temperature at the inlet to the first turbine stage is 1400 K. The expansion takes place isentropically in two stages, with reheat to 1400 K between the stages at a constant pressure of 300 kPa. A regenerator having an effectiveness of 100% is also incorporated into the cycle. The turbine and the compressor each have am isentropic efficiency of 80%. Determine the following: (a.)...

A normal shock moves at a constant velocity of 500 m/s into still air (100 kPa,...

A normal shock moves at a constant velocity of 500 m/s into still air (100 kPa, 0◦C). Determine the static and stagnation conditions present in the air after the passage of the wave, as well as the gas velocity behind the wave. Hint: consider an observer moving with the wave.

Saturated water vapor at 1000 kPa is throttled to 100 kPa. The velocity of the steam...

Saturated water vapor at 1000 kPa is throttled to 100 kPa. The velocity of the steam remains constant through the process. Determine the exit temperature of the water vapor. I know this is already awnsered in a solution for 1st edition but can someone help me understand what they do and how they picked the numbers they did from some table to get the exit temperature?

A 1.0 m3 tank, initially filled with 103. kPa, 300. K air, is connected to a...

A 1.0 m3 tank, initially filled with 103. kPa, 300. K air, is connected to a source of air at 1,500. kPa, 300. K. The tank slowly fills until it is at the same pressure. If the temperature is maintained at 300. K throughout this transient process, what is the total heat transfer required? (You can assume air is an ideal gas.)

Boil water in a bowl and cool in a room. The air temperature in the room...

Boil water in a bowl and cool in a room. The air temperature in the room is increasing linearly according to the function Ta (t) = 22 + 0.015t (t in minutes, T in ° C). Assume that Newton's Law of Cooling is satisfied: the rate of change of water temperature is proportional to the difference between the temperature of the water and the temperature of the environment. We take the water temperature after 8 minutes and find that it...

Question