An oil preheater consists of a single tube of D=10 mm diameter and L=25 m length. A surfaceheat flux of q."-exp(-x/25) [W/m²] is applied on the tube. Chemical reactions inside the oil causevolumetric heat generation at the rate of ġ = 1000 [W/m³]. Before entering the tube, the oil hasa uniform temperature of 25 °C and a flow rate of 0.025 kg/s, and its hydrodynamic boundarylayer has been fully developed.(a) Determine the type of flow (laminar or turbulent) inside the tube.(b) Determine the location where the thermal boundary layer is fully developed.(c) Perform the energy analysis of the fluid, and derive the temperature equation (in terms ofdTm and dx) for the oil (Do NOT need to solve it).(d) Calculate the temperature difference between the pipe surface and the oil (Ts-Tm) at theexit of the pipe. "= =KATcan1hAProperties of the oil: p = 865.8 kg/m³, cp=2035 J/kg K, = 8.36×102 Nos/m², k = 0.141W/mK, α = 0.8×10-7 m²/s, and Pr=1206.6.

[Note: This solution is based on the reference from the Heat and Mass Transfer Data Book_6th edition…

Answered: An oil preheater consists of a single…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Engine Cycle: Our inventor is still trying to design a heat engine that will outperform the Carnot cycle .. Design #801-456 is for an ideal, reversible engine that operates with the cycle shown below (A → B → C → D → A). The engine contains 0.421mol of a gas that has a heat capacity ratio of y = 1.300. Point Pressure [N/m²] Volume [m³] Temperature [K] A 1.05 x 105 0.010 300 B 1.85 x 105 0.010 529 1.85 x 105 0.014 751 D 1.05 x 105 0.014 426 PA B A D V (a) What is the efficiency of this engine cycle? (b) What is the efficiency for a Carnot cycle working between the same maximum and minimum temperatures?
6
the tube length is 1m.
At room temperature, the water in the storage tank is pumped up to the top of the absorption tower at a flow rate of 10.8 m3/h. The point at which the upward water is discharged is in the atmosphere at a height of 5 m from the surface of the water storage tank. Calculate the friction loss during transportation [J/kg] when the inner diameter of the transport pipe is 50mm, the efficiency of the pump is 50% and the pump work (Wp) is 150J/kg (=m2/s2). However, it is assumed that the area of the liquid level of the water storage tank is very large compared to the cross-sectional area of the transport pipe outlet.
A power plant condenser diverts from the power plant water that condenses heat at a rate of 34 [MW] The cooling water enters the condenser at a temperature of 15c and leaves at a temperature 30C lower than the water's condensation temperature. The pressure of the water at the exit of the turbine is 9[kpa]The condenser is made of brass tubes with an inner diameter of 25mm and an outer diameter of 30mm and the number of tubes in the condenser is 1000 A. Calculate the cooling water flow.B. Calculate the area of the heat exchanger on the condensing side
Fluid mechanics [Rotation and Translation of Fluid Masses] An rectangular tank with a width of 1.5 m, a length of 3.0 m, and a height of 2.0 m is filled with a liquid (sg = 0.8) to a depth of 1.5 m. The tank is accelerated along its length by a magnitude of 2.5 m/s2. Determine the forces acting on (a) the leading side of the tank, and (b) the rear end of the tank. Find the:a. lead side =__________kN b. rear side =__________kN
Consider a compressor which is adiabatic. At the inlet of the compressor the temperature is 360 K and pressure is 130 kPa and the air passes at the rate of 1 kg/s. At the exit of the compressor the temperature is 550 K and pressure is 900 kPa. Find the volumetric flow rate of air at the exit [m³/s] and also, power consumed by the compressor [kW]. Assumptions. Steady state process. Kinetic and potential energy changes are negligible. Air is an ideal gas with variable specific heats.
Air is allowed to flow from a reservoir with temperature of 21∘C and with pressure of 5[MPa]through a tube. It was measured that air mass flow rate is 1[kg/sec]. At some point on the tubestatic pressure was measured to be 3[MPa]. Assume that process is isentropic and neglect thevelocity at the reservoir, calculate the Mach number, velocity, and the cross-sectional area at thatpoint where the static pressure was measured. Assume that the ratio of specific heat isk=Cp/Cv=1.4.
Schematic diagram of a Simple Vapor Compression System is shown that uses refrigerant R-134a for operation at a condenser temperature of 40°C, an evaporator temperature of 0°C and develops 15 tons of refrigeration. Sketch the corresponding P-h diagram and determine: (d) Refrigerant volume flow rate displaced by the compressor (m2/min] (e) Power consumption by the system [kW] () Horse power per ton of the refrigeration Discharge or Delivery Line 2 Liquid Line Condenser 3 Expansion Device Expansion Line Compressor Evaporator Suction Line Qo
(c) A hot flexible aluminium alloy string [coefficient of thermal expansion, [a, = 23.6x10“(°C)', heat capacity Caloy = 904 J/kg.K ] with the length of 5000 %3D m and diameter 5 mm is immersed into a water bath containing water of 300 liters [Heat capacity, Cwater = 4200 J/kg.K ] with the initial temperature of 18 °C. Determine the length of the aluminium alloy string at temperature equilibrium state. Given the initial temperature of the aluminium alloy string at 300 °C and density of water is 1000 kg/m° and aluminium alloy is 2700 kg/m³.

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS