Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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- Question about heat exchangerarrow_forwardA=12 B=12 C=7 D=7arrow_forwardNeed answer ASAP In a counter-current-flow tubular heat exchanger, a liquid food (milk),flowing in the inner pipe, is heated from 20 to 40°C. In theouter pipe the heating medium (water) cools from 90 to50°C. The overall heat-transfer coefficient based on the insidediameter is 2000 W/(m^2-°C). The inside diameter is 5 cm andlength of the heat exchanger is 10 m. The average specific heatof water is 4.181 kJ/(kg-°C). Calculate the mass flow rate ofwater in the outer pipe. Compare the amount of milk being heated to concurrent design.arrow_forward
- Water must be heated from 15 to 50°C in a simple double-pipe heat exchanger at a rate of 3,500 kg/h. The water is flowing inside the inner tube with steam condensing at 110°C on the outside. The tube wall is so thin that the wall resistance may be neglected. Assume that the steam-film coefficient h_0 is 11 kW/m^2 °C. What is the length of the shortest heat exchanger that will heat the water to the desired temperature, considering an optimal diameter for the tube? Checking several table values, the following properties of water for this scenario are: p = 993 kg/m^3 k = 0.61 W/m °C \mu (viscosity) = 0.78 cP Cp = 4.19 J/g °Carrow_forwardBelow data was obtained from an experimental activity for a parallel pipe heat exchanger. Arrangement: counterflow (cold fluid in annular and hot fluid in tube). Mass flow rate: - Hot fluid: 1.03 kg/s - Cold fluid: 0.91 kg/s Temperatures: - Hot fluid inlet (Th.1): 80.5 +/- 10% °C - Hot fluid outlet (Th2): 64.0 +/- 10% °C - Cold fluid inlet (Te1): 20.0 +/- 10% °C - Cold fluid outlet (Tc2): 41.0 +/- 10% °C Assume cp constant and equal to 4.2 kJ/kg-K. 1. State assumptions (at least 9 unique ones) and include references. 2. What is the log mean temperature difference in °C? 3. What is the heat transfer rate on the cold side in kW? Heat added or lost on cold side? 4. What is the heat transfer rate on the hot side in kW? Heat added or lost on hot side? 5. What is the effectiveness of the heat exchanger for the given conditions? 6. Calculate the propagation of uncertaintv in kW for part 3 (heat transfer rate on the cold side) and part 4 (heat transfer rate on the hot side).arrow_forward
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