1. What is the pressure drop associated with water at 27°C flowing with a mass flow rate of 3.5 kg/s through a 600-m-long cast iron pipe of 0.15-m inside diameter? 2. Consider pressurized water, engine oil (unused), and Nak (22%/78%) flowing in a 20-mm- diameter tube. Determine the mean velocity, the hydrodynamic entry length, and the thermal entry length for each of the fluids when the fluid temperature is 100°C and the flow rate is 0.01 kg/s.
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- Current Attempt in Progress Consider pressurized water, engine oil (unused), and Nak (22 %/78%) flowing in a 20-mm-diameter tube. (a) Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.014 kg/s. (b) Determine the mass flow rate, in kg/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for water and engine oil at 300 and 400 K and a mean velocity of 0.018 m/s. Part A Your answer is incorrect. Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.014 kg/s. Liquid water engine oil Nak (m/s) ! i XALA(M) xer (m) Attempts: unlimited Submit AnswerEngine oil flows at a rate of 0.95 kg/s through a tube of 119 mm inside diameter and is heated from 293 to 327 K by condensing steam at 373 K. For the described case answer the following:i. Identify the type of flow and explain briefly about the flow with suitable assumptions & sketches.ii. Determine the inside heat transfer coefficient and rate of heat transfer per meter length of pipe for the identified flow pattern.Consider pressurized water, engine oil (unused), and Nak (22%/78%) flowing in a 20-mm-diameter tube. (a) Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.01 kg/s. (b) Determine the mass flow rate, in kg/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for water and engine oil at 300 and 400 K and a mean velocity of 0.022 m/s. Part A Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366K and the flow rate is 0.01 kg/s. Liquid Um (m/s) Xfdh (m) Xfd,t (m) water i engine oil i i i Nak i
- Water at 27°C flows with a mean velocity of 1 m/s through a 1 km-long pipe of 0.25 m inside diameter. Answer the following: a. Is the flow hydrodynamically fully developed? Support your answer with calculations. b. Is the flow thermally fully developed? Support your answer with calculations. c. What is the pressure drop over the pipe length, if the pipe surface is smooth? (Ans: 0.289 Bar) d. What is the pump power requirement, if the pipe surface is smooth? (Ans: 1.42 kW)Heat transfer problem Water flows through a thin-walled cylindrical tube of diameter 1 cm, maintained at a uniform temperature, ?s = 360 K. The inlet and outlet temperature of water was found to be ?i= 280 K and ?o = 355 K, respectively. (a) What is the log mean temperature difference in this case? (b) If the mass flow rate is 0.005 kg/s, what is the total rate of heat transfer from the tube to the water? (c) What is the Reynolds number corresponding to the given flow conditions? (d) Assuming fully developed flow in the entire tube, what should be the length of the tube to allow the abovementioned operating conditions ?A 10mm diameter and 20m long smooth tube is maintained at a constant surface temperature. Water enters the tube at 25 °C with mass flow rate of 0.01 kg/s. Properties of water at average mean temperature are: K= 0.65W/m.K, dynamic viscosity = 0.486X10^-3 Kg/m.s, Pr = 3.12 The flow at the end of the pipe is ?
- QS: Water at 15.56°C i to be heated in a 2-mm-ID tube until the exit temperature reaches 26.67+C. The tube wall temperature is maintained at 48.99-C and the inlet flow velocity is 0.3 m/s. Calculate the length of tube required in meters to accomplish this heating. Also calculate the total heating required, expressed in watts. Answers: L=0.13 mA 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/mol3. Water at an average bulk temperature of 80 F flows inside a horizontal smooth tube with wall temperature maintained at 180 F. The tube length is 6 ft and the diameter is 0.5 in. The flow velocity is 0.4 ft/s. Calculate the heat transfer rate. For water, c = 1 Btu/lb-F and k = 4.27 Btu- in/hr-ft2-F. *
- Twelve liters per minute of hot water at 330 K flow through a 0.5 inch schedule 40 (0.622 in wall thickness) domestic hot water line. What is the heat transfer coefficient inside the pipe? The kinematic viscosity is 0.5 x 106. The Prandtl number is 3.2.A shell-and-tube heat exchanger is used to cool compressed liquid methanol from 176 °F to 104 °F. The methanol flows on the shell side of the exchanger. The coolant is water that rises in temperature from 50 °F to 86 °F and flows within the tubes at a rate of 68.9 kg s1. Finding the appropriate thermophysical data and applying the proper equations, you are required to do the following: (a) Calculate i) methanol mass flow rate in the exchanger, ii) methanol volumetric flowrate at the inlet of the exchanger. (b) i) For the counter-current flow of the fluids calculate the log temperature difference, ii) explain the purpose of calculating this difference, iii) explain, quantitatively, why is the counter-current flow in heat exchangers preferred to co-current flow. meanWater flows through a tube of length L with a mean inlet temperature (T:). The tube is held at a uniform surface temperature (T3), which is greater than T;. Assuming fully developed, laminar flow, when the mass flow rate is doubled the heat flow water Ti stays the same increases decreases none of the above