determine the length of the tube required to achieve the desired heating.
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- With reference to the schematic below, a thin-walled double-pipe counter-flow heat exchanger is to be used to cool a hot fluid (cp=2200 J/kg.°C) from 150°C to 50°C at a rate of 2 kg/s by water (cp = 4180 J/kg°C) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, and its length is 6 m. Determine the overall heat transfer coefficient, U of this heat exchanger. Hot fluid 150°C Cold water 22°C 150°C Assumptions: 1.Steady operating conditions exist. 2 The heat exchanger is well-insulated so that heat loss to the surroundings is negligible.Hot water at 60℃ is cooled to 36℃ through the tube side of a 1–shell pass and 2-tube passesheat exchanger. The coolant is also a water stream, for which the inlet and outlet temperaturesare 7℃ and 31℃, respectively. The overall heat transfer coefficient and the heat transfer areaare 950 W/m2 K and 15 m2 , respectively. Calculate the mass flow rates of hot and cold waterstreams in steady operation. (Answers: 3.63 kg/s for both stream)A double-pipe parallel-flow heat exchanger is to heat water (Cp= 4180 JAgK) from 25°C to 60°C at a rate of 0.2 k g/s. The heating is to be accomplished by geotherm al water (Cy = 4310 J/kg K) available at 150°C at a mass flow rate of 0.25 kg/s. The inner tube is a thin- walled and has a diameter of 0.8 cm. If the overall heat transfer coefficient of the heat ex changer is 550 Wm2 K, determine the length of the tube required to achieve the desired heating
- Required information Consider a water-to-water counterflow heat exchanger with these specifications. Hot water enters at 70°C while cold water enters at 20°C. The exit temperature of the hot water is 15°C greater than that of the cold water, and the mass flow rate of the hot water is 50 percent greater than that of the cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 2200 W/K. Take the specific heat of both cold and hot water to be cp= 4180 J/kg.°C. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Cold water 20°C Hot water °C Th, in Determine the effectiveness of the heat exchanger. The effectiveness of the heat exchanger is 0.5807A counterflow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m^2, and the design value of the overall convection coefficient is 38 W/m^2-K. During a test run, engine oil flowing at 0.1 kg/s is cooled from 110°C to 66°C by water supplied at a temperature of 25°C and a flow rate of 0.2 kg/s. Determine whether fouling has occurred during the service period. If so, calculate the fouling factor, R"f(m^2• K/W).A double-pipe parallel-flow heat exchanger is used to heat water (cp = 4180 J/kg·K) from 25°C to 60°C at a rate of 0.2 kg/s. The heating is accomplished by geothermal water (cp = 4310 J/kg·K) available at 134°C at a mass flow rate of 0.3 kg/s. The inner tube is thin-walled and has a diameter of 0.8 cm. If the overall heat transfer coefficient of the heat exchanger is 550 W/m2·K, determine the length of the tube required to achieve the desired heating. (Round the answer to a single decimal place.) The length of the tube required to achieve the desired heating is ________ m.
- Glycerin (cp = 2400 J/kg⋅°C) at 20°C and 0.5 kg/s is to be heated by ethylene glycol (cp = 2500 J/kg⋅°C) at 100°C and the same mass flow rate in a thin-walled double-pipe parallel-flow heat exchanger. The overall heat transfer coefficient is 380 W/m2⋅°C and the heat transfer surface area is 6.5 m2. Determine the rate of heat transfer. The rate of heat transfer is _____ kW.A counter-flow double-pipe heat exchanger is to heat water from 20°C to 80°C at a rate of 1.2 kg/s. The heating is to be accomplished by geothermal water available at 160°C at a mass flow rate of 2 kg / s. The inner tube is thin- walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640W/m².K, determine the length of the heat exchanger required to achieve the desired heating.90,000 kg/h of a hydrocarbon are cooled from 70°C to 40°C by means of a stream of water that is heated from 20°C to 35°C. A 1-2 shell and tube heat exchanger with 4m long tubes, 2.54cm outside diameter and 2.21cm inside diameter should be used. Water flows on the tube side, calculate the number of tubes and water flow area. Cphc=0.45 kcal/kgºC and U=1400 kcal/hm² ºC
- A counterflow heat exchanger is employed to cool 0.55 kg/s (CP = 2.45 kJ/kg-K) of oil from 115°C to 40°C by the use of water. The inlet and outlet temperatures of cooling water are 15°C and 75°C, respectively. The overall heat transfer coefficient is expected to be 1450 W/m2-°C. Using the NTU method, calculate the following:a. The mass flow rate of water.b. The effectiveness of the heat exchanger c.Surface area requiredA stream of ammonia is cooled from 100oC to 20oC at a rate of 180 kg/hr in the tube side of a double-pipe counter-flow heat exchanger. Water enters the heat exchanger at 10oC at a rate of 250 kg/hr. The outside diameter of the inner tube is 3 cm and the length of the pipe is 7m. Using the log-mean temperature difference, calculate the overall heat transfer coefficient (U) for the heat exchanger. Determine the log-mean temperature difference. Determine the heat transfer coefficient for the heat exchanger. Cp for ammonia is 5234J/kgK and cp for water is 4180J/kgK.A shell-and-tube heat exchanger (one shell pass, multiple tube passes) is to be used to cool engine oil of 100 kg/s entering the shell side at 370 K and leaving at 338 K. The corresponding convection coefficient on the tube surface and the LMTD correction factor of the heat exchanger are known to be ho=10867 W/m2K and F=0.99, respectively. The condenser will be supplied with cooling water that enters the tubes at 280 K and is to exit the tubes at 320 K. Thin walled tubes of 30 mm diameter are specified and the mean velocity of water flow through the tubes is to be maintained at 1.42 m/s. Find: i) How many tubes must be used? ii) If the length of the heat exchanger is not to exceed 1.5 m, how many tube passes should be made? (for water =1000 kg/m3, cp=4000 J/kgK, µ=959x10-6 Ns/m2, k=0.606 W/mK, Pr=6.62 and for engine oil cp=2000 J/kgK) Could you please write the solution in detail?