2- A 15 m long, 75 mm diameter riser tube receives saturated water at 160 bar and at a velocity of 0.7 m/s. Heat is added to it uniformly. The slip ratio is 1.7. Estimate the maximum heat added to the tube in kJ/m if the exit void fraction is not to exceed 0.80.
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- 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.6. Fluid in a round tube of radius R has a temperature profile of T = To(1+ :) and a velocity profile of u = uo(1 – ). (a) Calculate the mixed mean temperature. (b) Calculate the temperature you would get if you stopped the flow, dumped all the fluid in the tube into a cup, and mixed it until the temperature was uniform. (c) Explain why your answers to (a) and (b) are not the same.B/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/Kg
- 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. (use Perry's Handbook for the properties and constants) R = 8314J/kgmol.K; MW=18.02g/mol What is the a.) value of G in kg/s.m2? b.)value of friction factor? 3 significant figures c.)the % of pressure drop? d.)the outlet pressure? e.) compressible or not?(c) The diameter of the piston and qutled,of the paint sprayer in Fig. 1 is 6 cm and 0.5 cm, respectively. The stroke_of thepston is 25 cm and the height difference between the liquid level in the contairfer'and the upper hole of tube is 12 cm. Calculate the minimum velocity of the piston during pumping to initiate atomizing effect if the liquid density is 1200 kg/m³. Take the atmospheric conditions are 20°C and 95 kPa (air density, Patr = 1.13kg/m³), and the liquid reservoir is open to the atmosphere.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/mol
- Water is flowing in a round tube. The temperature is . , and the dynamic viscosity is . The tube inside diameter is . W hat is the minimum velocity in so that the flow can maintain turbulent? ____________A sprue is 250 mm long. The velocity of the molten metal at the top of the sprue is 0.15 m/s. The middle diameter of the sprue is 10 mm. The total cavity of the "runner system + mold" is 2.5 × 106 mm³. The viscosity of the molten metal is 0.0022 kg/(m · s) and the density is 2700 kg/m³. According to given information i. For a proper sprue design, calculate the bottom diameter of the sprue ii. Find the velocity at the bottom of the sprue iii. Find the volumetric and mass flow rates at the bottom of the sprue iv. Find the required time to fill the mold completely v. Is the flow laminar, mixed or turbulent at the bottom of the sprue? P v? pg' 2g h+-+; = constant Q = A,V1 = A2V2 h2 h1 pVD Re A1 TST = Cm G) A2Q2:A) Define the bulk temperature (Tn), and prove that : T₁, - 2 ur dr B) Ethylene glycol flows at 0.01 kg/s through a 3 mm diameter, thin walled_tube. The tube is coiled and submerged in a well-stirred water bath maintained at 25 °C. If the fluid enters the tube at 85 °C, what heat rate and tube length are required for the fluid to leave at 35 °C ? At 60 °C, μ = 0.00522 kg/m.s, k = 0.26 W/m.K, C, 2562 J/kg.K. -