Q2a) Consider heat transfer to oil flow inside a copper pipe. Is the pipe length affecting the heattransfer rate into the oil? Briefly explain.b) Used engine oil can be recycled by a patented reprocessing system. Suppose that such a systemincludes a process during which engine oil flows through a 1-cm-internal diameter, 0.02-cm-wall copper tube at the rate of 0.05 kg/s. The oil enters at 35°C and is to be heated to 45°C byatmospheric-pressure steam condensing on the outside, as shown in figure given below.i)ii)iii)Determine the condensing steam temperature at 1 atm, T. [°C].Calculate the convection heat transfer coefficient for the oil inside the pipe, [W/m'.K].Calculate the rate of heat transfer rate into the oil, [kW], and,determine the length of the tube required.iv)Condensing steam Ct lamOil in35°COil out0.05 kg/sI em45°C0.02 cmCopper tubeL = ?

"Since you have asked multiple questions, we will solve the first question for you. If you want any…

Answered: a) Consider heat transfer to oil flow…

a) Consider heat transfer to oil flow inside a copper pipe. Is the pipe length affecting the heat transfer rate into the oil? Briefly explain.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.12P

See similar textbooks

Similar questions

For Heat transfer through cylinder tube wall, the temperature is to be a linear function of r (radius) of the tube. Select one: O True O False The conductivity of H20 in solid form (ice) is higher than that of H20 in liquid form (water). Select one: O True O False F, (Correction factor for temperature in some heat exchangers) should be 1.0 or greater than 1.0 in some cases. Select one: O True False
In any heat exchanger, the log mean temperature difference "could" be the same as the mean "average" temperature difference of both ends of the heat exchanger, depending on the temperature profile within that heat exchanger along heat exchanger tubes. Select one: OTrue O False At very low pressures (vacuum), the thermal conductivity of gases approaches zero. Select one: O True O False
Hello! I'd like help with the following exercise, from Levenspiel's "Engineering Flow and Heat Exchange". Leftover air at 20ºC and 100kPa is driven by a fan through a horizontal galvanized conduit of 1 m in diameter and 10m in length at a speed of 10 m/s. What size motor should be used if its efficiency is 90% and that of the fan is 20%? I'm not sure where to start. My professor hasn't explained much about this subject.
Estimate the heat exchanger area needed to cool 55,000 lb/hr of a light oil (specific heat= 0.74 Btu/lb°F) from 190°F to 140°F using cooling water that is available at 50°F. Thecooling water can be allowed to heat to 90°F. An initial estimate of the Overall HeatTransfer Coefficient is 120 Btu/hr.ft².°F.  Show a schematic of the heat exchanger. Estimate the required mass flow rate of cooling water. The LMTD Taking the shell and tube heat exchanger described above how manytubes of 3 inch diameter and 10 ft length should be used?
In a heat exchanger, a fluid with a density of 2.5 m per hour and a specific heat of 0.727 kcal / kg ° C cools from 120 ° C to 40 ° C and heats 10 m per hour with an inlet temperature of 10 ° C. Since the total heat transfer coefficient is 1000 kcal / m h ° C, (Psu-1000 kg / m²; Cpsu = 1 kcal / kg ° C) a) Parallel flow case, b) Counter flow case, calculate the surface area of the pipe.
(a) A storage tank is connected to a piping system as illustrated in Figure P1. Water at temperature of 20°C in the storage tank flows through a piping system with the pipe's diameter of 5 cm and discharges from a nozzle to the atmospheric at velocity of 3.5 m/s. The diameter of the nozzle is 3cm. Galvanized pipe is used and installed in this piping system. All the fitting components installed in this system such as regular 90° and tees are flanged type. Water at 20°C 21 m D-5 cm d-3 cm Figure P1 i. By using suitable assumptions, predict the friction factor of this piping system (Including the Moody Chart is necessary). ii. According to the obtained friction factor in section P1(a), determine the possible pipe length of this piping system ii. After 5 years of operation, the accumulation of the dirt and other micro particles stained on the pipe's wall surface have significantly reduced the water discharge from the nozzle. Please explain this phenomenon. |
Crude oil, Cp = 1.9 kJ/(kg.K), flows at a rate of 0.32 kg/s through the inner pipe of a tube-in-tube heat exchanger and it is heated from 29 °C to 96 °C. Another hydrocarbon, Cp = 2.50 kJ/(kg. K), enters at 240 °C. The overall coefficient of heat transfer is found to be 4200 W/(m?K). Determine for a minimum temperature difference of 20 °C between the hot and cold Nuids; a) the LMTD for parallel flow and for counterflow heat exchamger; b) the surface area for both heat exchanger configurations; c) mass Now rate of hot Nuid for both heat exchanger configurations.
Air enters a duct (100 cm *10 cm*10 cm) at 32°C at a rate of 0.28 m/min to cool 138 W electronic component placed on the duct. Assuming 85 percent of the heat generated inside is transferred to air flowing through the duct and the remaining 15 percent is lost through the outer surfaces of the duct. What is the convective heat transfer coefficient (W/m2.°C), Assume fully developed flow for the whole channel length and (if flow is NOT Laminar use Dittus-Boelter equation:Nu=0.023 Re0.8Pr") E1007 J/kg.°C, v =1,654×10 m /s, p = 1.146 kg/m Pr= 0.7268, k = 0.02625 W/m. °C Select one:
In a parallel flow heat exchanger, hot water at a flow rate of 1 kg/s is cooled from 90° C to 60 °C with a cooler at a temperature of 40 °C at a flow rate of 2 kg/s. Total heat transfer coefficient 1000 W / m2.K. Cph = Cpc= 4182 J/kgK According to this;a) determine the required area for the heat exchanger using the logarithmic mean temperature difference method.b) determine the required area for counter-flow heat exchanger status.c) determine the required area, taking into account the state of a cross-flow heat exchanger in which one flow is mixed, in which the other flow is not mixed. d) assume that the output temperature of the hot fluid is not given, take the area 6.42 m2 for the parallel flow heat exchanger state and calculate the output temperature of the hot water using the efficiency-NTU method.
Tony Stark, a brilliant inventor, has designed a special suit/armor that has an inbuilt small but concentrated high-powered reactor as its power source. The only problem is there is lot of heat generated in the reactor that needs to be cooled for the suit to be actually wearable. Stark needs a heat exchanger mounted on the suit to dissipate the excess heat generated in the reactor. He found a 10 cm x 20-cmx5-cm space on the armor for the heat exchanger. He chose a liquid (specific heat 2.8 kJ/kg°C) that circulates around the reactor and takes heat away from the reactor and then enters the heat exchanger with mass flow rate of 0.2 kg/s at a temperature of 180°C. It comes out of the heat exchanger at a temperature of 10°C. The other fluid in the heat exchanger is a phase-changing liquid that remains at -23°C as it changes phase from saturated liquid to a mixture of liquid and vapor during the heat exchange process. The latent heat vaporization for the phase-changing liquid is 560 kJ/kg.…
Q) Compare the heat transfer coefficients under the following conditions (Assume flow is turbulent). (1) Two fold increase in the diameter of the tube; the flow velocity is maintained constant by a change in the rate of liquid flow. (2) Two fold increase in the flow velocity by varying the mass flow rate. Comment on. the results.
Table Q3 is given to collect the temperature of hot and cold water at the inlet and outlet positions in the laboratory using Tube Heat Exchanger (TD360a) by varying the cold-water flow rate to investigate the effect of cold-water flow rate on the heat exchanger’s performance. (a) Complete all the output parameters indicated in the table given in Appendix 1. (b) Draw the temperature (TH1, TH2, TC1 and TC2) on the vertical vs position (1, 2) on the horizontal axis for each flow and discuss the effect of cold water flow rate change on the exit temperature of both cold water and hot water. (c) Draw the graph of Energy Balance Coefficient and Mean Temperature Efficiency on vertical axis and cold-water flow rate on horizontal axis. Discuss the effect of flow rate on the Energy Balance Coefficient and Mean Temperature Efficiency based on your finding.