13. Find the water flow rate at an average temperature of 15 C in the shell-side of a heat exchanger. Use L = 7.62 m, shell inside diameter D = 0.914 m, tube outside diameter d = 3.81 cm, number of tubes Nube = 200, AP = 110.32 kPa, and total
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REFERENCE: FROM BOOK - ENGINEERING THERMOFLUIDS, M. MASSOUD
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- Design a simple piping system to pump water at temperature 130F from a sump below a heat exchange to the top of the cooling. The desired flow rate is 222gal/min, and the pump efficiency is 88%. Include the required power and head loss of the pump and the total head loss.The chief engineer at a university that is constructing a large number of new student dormitories decides to install a counter flow concentric tube heat exchanger on each of the dormitory shower drains. The thin walled copper drains are of diameter Di = 50 mm. Wastewater from the shower enters the heat exchanger at Th,i= 38°C while fresh water enters the dormitory at Tc,i= 10° The wastewater flows down the vertical wall of the drain in a thin, falling fil , providing hh = 10,000 W/m2. K.If the annular gap is d= 10 mm, the heat exchanger length is L= 1 m, and the water flow rate is m˙ =10 kg/min, determine the heat transfer rate and the outlet temperature of the warmed fresh water.If a helical spring is installed in the annular gap so the fresh water is forced to follow a spiral path from the inlet to the fresh water outlet, resulting in hc = 9050 W/m2.K, determine the heat transfer rate and the outlet temperature of the fresh water.Based on the result for part (b), calculate the daily…The clean U for an exchanger is 770 BTU/(hr 0 F ft2). Its tube area is 550 ft2. After operating for several months, it is heating water from 40 0F to 150 0F at a flow rate of 200 GPM with a heating fluid on the shell entering at 300 0F and exiting at 170 0 F. Has the overall U decreased significantly? how many 1.0 inch diameter, 20 ft long tubes would it take to equal the 550 ft2 area?
- A still mill desires to cool 3000 gal/hr of an inorganic liquid from 250oF to 180oF by Lehigh River water flowing through a shell-and-tube exchanger at a rate of 5000 gal/hr. The liquid is somewhat acidic in nature and so an alloy exchanger is probably required.Within the plant is an unused S-and-T, floating-head exchanger have one shell pass and two tube passes. The shell is mild steel, and the tubes are type 304 stainless. Specifications of the surplus exchanger revel a 20-in I.D. shell with 158 1-in 14 BWG tubes 16 ft long laid out on a 1.25 in square pitch. Baffles are placed 6-in apart.Will the surplus exchanger be suitable for the cooling requirements? Assume the inorganicliquid has the physical properties of water.Benzene flowing at a rate of 10000 lb/h is to be heated from 60 F to 120 F in a double pipe heat exchanger with an aniline stream that will be cooled from 150 F to 100 F. If the customer requires that the double-pipe heat exchanger will consist of 16 ft, 2.5 inches long by 1 inch sch. 40 pipes and 1 inch sch 40 nozzle size, design a double pipe heat exchanger. Calculate the pressure dropA centrifugal pump must be installed 6 m above the water level in a tank. the bomb will operate at a rate of 0.01 m³/s. The manufacturer suggests a pump with NPSHR at this flow rate of 2.5 m. Neglect friction losses, with the exception of a heat exchanger between the tube inlet and pump suction, which has a loss coefficient Cf = 15. The pipe diameter is 15 cm and the pressure of water vapor at 30°C is 4.246 kPa. Is this pump suitable for the given conditions?
- Hello, i have an example question with an answer already given. Please help me in finding its solution so i can review and see the process and understand the concept. Thank you very much1.Question: Water at 15°C is pumped from a reservior at a rate of 0.1131 m3/s where the local atmospheric pressure is 94.6 kPa. The total head loss in the suction pipe is 1 m. From the manufacturer data, the NPSHrequired at this operating point is 7.8. Determine the maximum height hs (meters) before cavitation can occur. Round off your answer to 3 decimal places.Answer: 0.669Grape juice is being pumped at 27ºC from an open tank through a sanitary tube (Di = 0.03561 m) for second tank on a higher level. The mass flow rate is 3 kg/s (ρ = 997.1 kg/m³) up to 60 m of linear pipe, with 2 standard 90º elbows (Cff = 1.5) and an angle valve (Cff = 2). the tank supply line maintains a liquid level of 6 m, and the grape juice leaves at a height of 6 m. 24 m above the ground. Calculate the efficiency requirements of the pump that has an efficiency of 65%.Completely solve and box the final answer. Write legibly 6. A counterflow heat exchanger is designed to heat fuel oil from 32.5ºC to 94.7ºC. The hot flue gas enters at 174.3ºC and leaves at 120.8ºC. Calculate the log mean temperature difference.
- Water at 16,2°C is to be discharged from a reservoir at a rate of 16,2 L/s using two horizontal cast iron (roughness value ɛ=0.00026m) pipes connected in series and a pump between them. The first pipe is 26,2 m long and has a 66,2 mm diameter, while the second pipe is 36,2 m long and has a 46,2 mm diameter. The water level in the reservoir is 30 m above the centerline of the pipe. The pipe entrance is sharp-edged (KL=0.562), and losses associated with the connection of the pump are negligible. Neglecting the effect of the kinetic energy correction factor, determine the required pumping head, the minimum pumping power and electric motor power for total efficiency value of 76,2% to maintain the indicated flow rate. Water density is r=996,2 kg/m3, dynamic viscosity µ= 1.162x10-3kg/ms. Solve the problem by making the necessary assumptions and drawing the schematic figure.a hot fluid enters a concentric pipe heat exchanger at 150ºC and is cooled to 100ºC by a cold fluid entering at 35ºC and is heated to 65ºC. Construct the length of the exchanger pipe for counter and parallel flow arrangement using relevant diagrams, formulaes ,and computationplease find minimum pumping power? First tube lenght= 20m first tube diameter=6cm second tube lenght= 35m second tube diameter=4cm water height= 30m flow=22Lt/second sharp edge loss = 0.5 g=9.81m/sn2, ε=0.00026m, μ=1.139x10-3kg/m.sn