A lead pipe has 2 cm inside diameter, 3 cm outer diameter, length of 130 cm. Liquid water at 4°Cflows through the pipe with a bulk velocity of 2.50 km/hr. Air is blown around the outside of thepipe at 20 deg C. The inside wvall of the said pipe has a temperature of 8 deg Celsius.Density of liquid water= 1000 kg/m'Cp water=4.210 J/kgKViscosity of liquid water= 1.5674 x10° Pa.sthermal conductivity of lead = 35 W/mKFind:Overall heat coefficient (U) based on outside surface areab. System's heat transfer ratePrandtl (Pr), Reynolds (Re) numbers and type of flowа.с.

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Answered: 8. A lead pipe has 2 cm inside…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Hand Sanitizer (70% propanol gel) needs to be transported on a floor in a hospital from a central location per floor. The room farthest from the source is 17.5-m away. The hand sanitizer enters the tubing at 20°C and 275 kPa absolute and exits the tubing at atmospheric conditions. The tubing can Flowrate/velocity Calculation. Hand sanitizer be considered smooth; however, there are two (2) 90° curved elbows and four (4) Tee Run throughs, and one (1) foot value (Refer to the Loss for Fittings table in Canvas). The density of the hand sanitizer is 955 kg/m3 and the viscosity is 4.5 cP. What is the flow rate that can be obtained if the tubing diameter is 4.5-mm?
8. A lead pipe has 2 cm inside diameter, 3 cm outer diameter, length of 130 cm. Liquid water at 4°C flows through the pipe with a bulk velocity of 0.03 km/hr. Air is blown around the outside of the pipe at 20 deg C. The inside wall of the said pipe has a temperature of 8 deg Celsius. Density of liquid water= 1000 kg/m³ Cp water=4.210 J/kgK Viscosity of liquid water= 1.5674 x10° Pa.s thermal conductivity of lead = 35 W/mK thermal conductivity of water = 0.575 W/mK Find: Overall heat coefficient (U) based on outside surface area b. System's heat transfer rate Prandtl (Pr), Reynolds (Re) numbers and type of flow а. с.
What is the Reynolds number of a fluid flowing in a tube with an inside diameter of 1 inches? The viscocity is 1.353 x 10^ -5 lb/ft-s and the mass flow rate is 79 lb/h.Correct Answer: 24,780.96 ± 1%
You are designing an IC heatsink which uses round pins in cross-flow. The heatsink must dissipate 3000W. The heatsink has 10 rows of 8 columns of round pins with a diameter of 1mm. The pins have longitudinal and transverse pitch of 6mm. The incoming air is at 25oC with a velocity of 3 m/s. Assume fluid properties are constant. If the pins are arranged in-line: a) Find the Reynold’s Number b) Find the Nusselt Number c) If the pins are 30mm tall, how hot must the pin surface be (average) to dissipate the proper amount of heat?
A capillary tube has an 8mm inside diameter through which liquid fluorine refrigerant R-11 flows at a rate of 0.03 cm3/s. The tube isto be used as a throttling device in an air conditioning unit. A model of this flow is constructed by using a pipe of 3cm inside diameter and water as the fluid medium. (Density of R-11 = 1.494 g/cm3 and its viscosity is 4.2 x10-4 Pa.s; Density of water is 1g/cm3 and its viscosity 8.9 x10-4 Pa.s)a) What is the required velocity in the model for dynamic similarity? Hint: For flow through a tube the Ne number can be expressed in terms of the Reynolds numberb) When dynamic similarity is achieved the pressure drop is measured at 50 Pa. What is the corresponding pressure drop in the capillary tube?Hint: In this case the Euler number defines dynamic similarity with reference to the static pressure drop
In a gas manufacturing plants, they presented a horizontal tube in which a gas assumed to be ideal is flowing steadily. It was identified that no heat and work interaction was done. Also, there is a significant changes in the pipe diameter as well as velocity. If in case we select N2 as the flowing gas at 761.67 R at a velocity of 5.6 m/h, Calculate the temperature where the velocity us 180 km/h? Assume cp=7/2 R.
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Water flows at a rate of 0.1 kg/s in a tube with a diameter of 250 mm. The tube is heated uniformly at a rate of 135 kW/m2. Find the wall temperature at a location where Tsat = 180 C and x = 25%. [Ans.: Ts = 188 C]
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