Question

A concentric tube arrangement, for which the inner and outerdiameters are 80mm and 100mm, respectively, is...

A concentric tube arrangement, for which the inner and outerdiameters are 80mm and 100mm, respectively, is used to remove heatfrom a biochemical reaction occurring in a 1-m-long settlingtank. Heat is generated within the tank at a rate of 10^5W/m^3, and water is supplied to the annular region at a rate of 0.2kg/s
Reaction Tank:
q(prime)=1*10^5 W/m^3
L=1m
mass flow rate = 0.2 kg/s
di=80mm do=100mm
Part (a):
Determine the inlet temperature of the supply water that willmaintain an average tank surface temperature of 37 degrees C. Assume fully developed flow and thermal conditions. Is this assumption reasonable?

(b) It is desired to have a slight axial temperature gradient on the tank surface, since the rate of the biochemical reaction is highly temperature dependent. Sketch the axial variation of the water and surface temperatures along the flow direction for the following two cases: (i) the fully developed conditions of part (a), and (ii) conditions for which entrance effects are important. Comment on features of the temperature distributions. What change to the system or operating conditions would you make to reduce the surface temperature gradient?

Especially b!!!!!

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
heat transfer problem A counterflow concentric tube heat exchanger is used to cool lubricant oil of...
heat transfer problem A counterflow concentric tube heat exchanger is used to cool lubricant oil of a big gas turbine. The cooling water's flow rate through the interior aluminum tube (Di= 25mm) is 0.2kg/seg, while the oil's flow rate through the exterior ring (Do= 45mm) is 0.1kg/seg. The oil and the water enter at 100°C and 30°C respectively. How long does the tube have to be for oil to leave at 60°C? Oil at 80°C Cp = 2131 J/Kg K...
A farmer wants to pump water from a river to a very big open storage tank...
A farmer wants to pump water from a river to a very big open storage tank nearby using a 55-m long, 16-cm diameter plastic pipe with 5 threaded 90° regular bends, 5 threaded 45° regular bends, and one fully open gate valve. The water velocity near the river surface is 2.7 m/s and the pipe's inlet is placed in the river normal to the direction of water flow to take advantage of this water speed. The elevation difference between the...
Water (inlet temperature of 30 C) flows at rate of 3.4 kg/s through a 30 cm...
Water (inlet temperature of 30 C) flows at rate of 3.4 kg/s through a 30 cm diameter aluminium tube. You intend to heat the water to 40 C at the exit of this tube. It is recorded that the surface temperature of the tube is 98 C. Evaluate the length of tube required for this condition. Assume fully developed flow. Then, compare your calculated length with 4 m, comment on the water exit temperature if the tube length is changed...
A concentric tube heat exchanger is comprised of a stainless steel (ks = 40 W/mK) inner...
A concentric tube heat exchanger is comprised of a stainless steel (ks = 40 W/mK) inner pipe, NPS 2- nominal schedule 40 size (corresponding to an inner diameter of 52.5 mm and an outer diameter of 60.3 mm), and an outer stainless steel pipe of NPS 3-nominal schedule 40 (ID = 77.9 mm, OD = 88.9 mm). The heat exchanger has an effective length of 35 m. The inner pipe fluid is ammonia (?a = 0.3 · 10?6 m2/s, cpa...
A concentric tube heat exchanger is comprised of a stainless steel (ks = 40 W/mK) inner...
A concentric tube heat exchanger is comprised of a stainless steel (ks = 40 W/mK) inner pipe, NPS 2- nominal schedule 40 size (corresponding to an inner diameter of 52.5 mm and an outer diameter of 60.3 mm), and an outer stainless steel pipe of NPS 3-nominal schedule 40 (ID = 77.9 mm, OD = 88.9 mm). The heat exchanger has an effective length of 35 m. The inner pipe fluid is ammonia (va = 0.3 · 10-6m2/s, cpa =...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT
Active Questions
  • The following sample observations were randomly selected. (Round intermediate calculations and final answers to 2 decimal...
    asked 13 minutes ago
  • what type of graph is best suitable for data obtained from customer ratings. The ratings are...
    asked 16 minutes ago
  • Determine the cumulative 15-year 18 kip ESAL’s in the design lane for 2-lane highway for the...
    asked 24 minutes ago
  • Q: Dr.Grimace, the evil dentist, is trying to find out if his patients suffer from periodontal...
    asked 24 minutes ago
  • After collecting data on 19283 dogs, you find that male vallhunds have an average weight of...
    asked 26 minutes ago
  • Research Target Corporation and assess your satisfaction with the company you researched and make recommendations about...
    asked 27 minutes ago
  • Evidence suggests that 70% of FSU students like turtles. Suppose we randomly sampled 15 FSU students....
    asked 27 minutes ago
  • Ulrich challenges the appropriateness of the nearly universal symbolism of the spinning wheel as the marker...
    asked 28 minutes ago
  • Differential Equations: Please try to computer type, if not possible be clear and organize. Thank you...
    asked 28 minutes ago
  • In your opinion, what are the three (3) most important benefits an employer can give to...
    asked 34 minutes ago
  • In a test of the effectiveness of garlic for lowering​ cholesterol, 81 subjects were treated with...
    asked 36 minutes ago
  • How does the 95% confidence interval correspond to the reported conclusion at a 0.05 significance level?...
    asked 37 minutes ago