Question

Milk enters a heat exchanger at 200C and is heated to 750C using hot water at...

Milk enters a heat exchanger at 200C and is heated to 750C using hot water at a temperature of 900C. 1) If exit temperature of water is 800C, assume parallel flow and determine the log mean temperature difference between water and milk.  

2) assume countercurrent flow and determine the log mean temperature difference between water and milk.

3)assume countercurrent flow and determine the overall heat transfer coefficient of heat exchanger (based on inside diameter). Assume specific heat of water as 4.18 kJ/(kg 0C).

Engineering   Chemical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Cold water enters a counter flow heat exchanger at 20ºC at a rate of 10 kg/s,...
Cold water enters a counter flow heat exchanger at 20ºC at a rate of 10 kg/s, where it is heated by a hot water stream that enters the heat exchanger at 80ºC at a rate of 2 kg/s. Assuming the specific heat of water to remain constant at Cp=4.18 kJ/(kg.ºC), determine the maximum heat transfer rate and the outlet temperatures of the cold and the hot water streams.
Hot water enters a counter-flow double-pipe heat exchanger at 180F with a velocity of 5 ft/s....
Hot water enters a counter-flow double-pipe heat exchanger at 180F with a velocity of 5 ft/s. Cold water at 80F flows at 3 ft/s in the outer section of the exchanger. The diameter of the inner pipe is 1 inch, the pipe wall thickness is 1/8", and the outer pipe diameter is 2 inches. The overall heat transfer coefficient times area per unit length UA/L = 150 Btu/hr-ft-F. If the exchanger is 16 feet long, what is the exit temperature...
A parallel flow heat exchanger is used to transfer heat from hot water at 80oC, flowing...
A parallel flow heat exchanger is used to transfer heat from hot water at 80oC, flowing at 5 L/min to cold water at 15oC which is flowing at a rate of 15 L/min. The overall heat transfer coefficient is 2000 W/m2oC and the area is 0.2m2. Calculate the heat transfer rate, the outlet temperature of the cold water.
Water is used to cool R-134a in the condenser of a heat exchanger. The refrigerant enters...
Water is used to cool R-134a in the condenser of a heat exchanger. The refrigerant enters the counter-flow heat exchanger at 800 kPa, 80 0C and a mass flow rate of 2 kg/s. The refrigerant exits as a saturated liquid. Cooling water enters the condenser at 500 kPa and 18 0C and leaves the condenser at 30 0C. Determine the necessary mass flow rate of water. Each fluid is assumed to flow at constant pressure.
A heat exchanger uses saturated steam at 375 K to heat cold water entering at 280...
A heat exchanger uses saturated steam at 375 K to heat cold water entering at 280 K and leaving at 301 K only the latent heat of vaporization is removed from the steam. i.e. the steam is condensed and saturated water exit the exchanger. a) what is the LMTD for a counter current heat exchanger? b) what is the LMTD for a parallel or cocurrent heat exchanger? c) if the counter current heat exchanger has a duty (Q) of 81000...
1) Water is heated by steam in a heat exchanger. The water comes in at .4...
1) Water is heated by steam in a heat exchanger. The water comes in at .4 MPa and 10°C and leaves at 110°C. flow rate of the water is 2 kg/s. 0.5 kg of steam comes in at a pressure of 0.6 MPa at 300°C, determine the exit temperature and state of the steam and rate of condensation if any
An industrial facility needs a flow of 100 gpm of hot water at 180°F, 50 psia....
An industrial facility needs a flow of 100 gpm of hot water at 180°F, 50 psia. Two designs are being considered to make the hot water. In Design 1, the hot water is produced by injecting steam into an insulated mixing chamber through which the water passes. The water enters the chamber at 50°F, 50 psia. Steam is injected into the chamber at 325°F, 50 psia. The hot water leaves at the required flow rate and temperature. For this system...
Air is heated by exhaust gases that flow in a heat exchanger, as shown in the...
Air is heated by exhaust gases that flow in a heat exchanger, as shown in the figure. The heat gained by the air is measured as 320 kW and the inlet air temperature is 20°C. Exhaust gases inlet state is 527°C, 822 kJ/kg, 64 m/s while the exit state is 327°C, 607 kJ/kg, 78 m/s. If the flow rate of air is 10kg/s, determine the flow rate of exhaust gases and the exit temperature of air. [Cp-air = 1.005 kJ/kg...
A thin-walled double pipe counter flow heat exchanger is to be used to cool oil (cp...
A thin-walled double pipe counter flow heat exchanger is to be used to cool oil (cp = 2200 j/kg*K) from 150 ℃ to 30 ℃ at a rate of 2.1 kg/s by water (cp= 4180 J/kg*K) that enters at 20 ℃ at a rate of 1.2 kg/s. The diameter of the tube is 2.5 cm, and its length is 10 m. Using Excel (a) Determine the overall heat transfer coefficient of this heat exchanger. (b) Investigate the effects of oil...
A thin-walled cross-flow heat exchanger is used to heat a petrochemical whose specific heat is 1800...
A thin-walled cross-flow heat exchanger is used to heat a petrochemical whose specific heat is 1800 J (kg K)-1 with hot water (Cp = 4180 J (kg K)-1). The petrochemical enters the heat exchanger at 20oC at a rate of 3.7 kg s-1, whilst the water stream enters at 110oC at a rate of 2.5 kg s-1. The heat transfer surface area of the heat exchanger is 4.8 m2 and the overall heat transfer coefficient is 940.30 W m-2K-1. Determine...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT