Estimate the leakage through the wall per
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Q: 8. In the figure below a manometer uses oil with specific gravity of 0.8. (a) Calculate the…
A: The figure is given as, The given values are, R= 1 ft=0.3048 md1=0.1524 md2=0.0762 m
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- K spherical shaped vessel of 1.2 m diameter is 100 mm thick. Find the rate of heat leakage, if the temperature difference between the inner and outer surfaces is 200° C. Thermal conductivity of material is 0.3 kJ /mh°C.1. 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 2.50 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. Find: a. Overall heat coefficient (U) based on outside surface area b. Prandtl (Pr) and Reynolds (Re) numbers based on classification of flowA 2 m wide, 3 m high, and 50 mm thick sheet of XPS insulation (M = 50 ng/Pa.s.m2), has a vapor pressure of 1500 Pa on one side, and 3500 Pa on the other. Calculate the vapor flow rate (Qv), vapor flux (qv), permeability, Rv value and the permeability (μ)
- Water at 10C temperature flowing from a pipe with a diameter of 100mm at a speed of 2m / s, air from a pressure of 2 ATM at 180F flowing at a speed of 50 ft / s from a pipe with a diameter of 2 in, and an oil with a specific gravity of 0.78 and a diameter of 20 cp at a speed of 5 ft / s through a 2in pipe. Shows the flow state of the biopolymer melt flowing through the pipeline at a speed of 0.2 m/s, with a density of 900 kg/m3 and a density of 1 Pa-sA thermocouple junction is in the form of 8 mm diameter sphere. Properties of materialare: Cp = 420 J/kg-K; ρ = 8000 kg/m3 ; k = 40 W/m-K; h = 40 W/m2 -K. This junction isinitially at 40 oC and inserted in a stream of hot air at 300 oC. Find the following:a. Time constant of the thermocouple.b. The thermocouple is taken out from the hot air after 10 seconds and kept in still airat 30 oC. Assuming the heat transfer coefficient in air is 10 W/m2-oC, find thetemperature attained by the junction 20 seconds after removal from hot air.Calculate the critical and actual heat flux for pool boiling of water at 2.1 bar from a surface at 130 °C. Take: Saturation temperature =123 °C PL= 941.6 kg/m', pv=1.18 Ca= 4.25 KJ/kg.°C K=687*10 W/m°C HL=230*10“ Ns/m2 2=2198 KJ/Kg 0=55*10 N/m Pw at 125°C = 2.5*10$ N/m² P,=2.25*10 N/m²
- A saturated steam at 410K is being transported in a pipeline (brass drawing tubing) at a rate of 1 grams/second. Pipe has inside diameter of 0.025 m . The tube is 100m long. The pressure at the entrance is 80kPa. What is the % of pressure drop? (use Perry's Handbook for the properties and constants) R = 8314J/kgmol.K; MW=18.02g/molB/A boiling channel receives a thermal power of 6000 kw. If subcooled water at 275 °C enters the channel at a flow rate of 15 kg/s what is the void fraction at the channel outlet where the slip ratio is 1.687 and pressure is 68 bar. Given data: At 68 bar: h=1256 KJ/Kg, hg-1518 KJ/Kg, V-1.344*10-³ m³/Kg, V-28.27*10³ m³/KgMerrill et al. (1965) in a series of classic experiments studied the flow of blood in capillary tubes of various diameters. The blood had a hematocrit of 39.3 and the temperature was 20°C. They measured the pressure drop as a function of the flow rate for five tube diameters ranging from 288 to 850 μm. When they expressed the measured pressure drops in terms of the wall shear stress, and the volumetric flow rates in terms of the reduced average velocity, all of the data for the various tube sizes formed, within the experimental accuracy, a single line as predicted by the Rabinowitsch equation expressed in terms of reduced average velocity. From their results they provide the following values of the Casson parameters at 20°C: τy = 0.0289 dynes cm−2 and s = 0.229 (dynes s cm−2)1/2. Using these values for τy and s, show that the equation below for reduced average velocity provides an excellent fit to their data summarized in the following table. (Wall shear stress) τw , dynes cm-2…
- High-pressure steam condenses at 400 K on the outer surface of a thin-walled tube of 50 mm diameter. The overall heat transfer coefficient between steam and air on the inside of the tube is 200 W/m?. If the air enters the tube at 25 m/s, 150 kPa and 280 K, find the length of the tube required for the air to be heated to 350 K. [Ans. L = 13.9 m]A chromel–constantan thermocouple measuring the temperature of a fluid is connected by mistake with copper–constantan extension leads (such that the two constantan wires are connected together and the copper extension lead wire is connected to the chromel thermocouple wire). If the fluid temperature was actually 250 C and the junction between the thermocouple and extension leads was at 90 C, what e.m.f. would be measured at the open ends of the extension leads if the reference junction is maintained at 0 C? What fluid temperature would be deduced from this (assuming that the connection error was not known)?Sipho’s mother is making a fire in the stove inside a shack using coal. A fan is used to extract the flue gasfrom the fire via a chimney made of zinc material. The wall thickness of Chimney is L=4mm and the walltemperature of the chimney on the flue gas side is T_si=60˚C. Sipho, playing outside next to the chimneyexperiences an ambient temperature of 20˚C. The surrounding temperature is T_sur=35˚C and the emissivityis ε=0.95. Assume the convection coefficient is 20W/m2K and the chimney is grey material.Under these conditions determine the outer surface (air side) temperature T_so=? of the chimney.