Question 3:Water flowing at the rate of 1.1 kg/s in a 2-4 shell-and-tube heatexchanger is heated from 50 °C to 75 °C by an oil having a heatcapacity of 1.9 kJ/kg.K. The oil enters the heat exchanger at 125°C and leaves at 90 °C. Calculate the area of the exchanger if theoverall heat-transfer coefficient is 250 W/m².K.

Step 1: Step 1: Determine the Heat Transfer Rate (Q): First, we need to find the amount of heat…

Answered: Question 3: Water flowing at the rate…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

See similar textbooks

Similar questions

1. Oil enters the tube side of a shell-and-tube heat exchanger with a flow rate of 5.04 kg/s (c, = 2.09 kJ/kg-K; p = 900 kg/m3) and it is cooled from 366.5 K to 344.3 K by 2.02 kg/s of water entering at 283.2 K. The overall heat-transfer coefficient U, is 340 W/m2-K. The tubes have an outside diameter of 60.33 mm and inside diameter of 52.50 mm (use outside diameter for surface area, use inside diameter for mass flow rate in tubes). The velocity of the oil is 0.100 m/s. Calculate the number tubes and tube passes if space constraint limits the tube length to be 1.50 m and lesser and shell pass is only 1. Figure 10-8 | Corection-factor plot for exchanger with one shell pass and two, four, or any multiple of tube passes. 12
plz write neatly, do not copy and paste solution
A 101 g -g sample of steam at 100 ∘C is emitted from a volcano. It condenses, cools, and falls as snow at 0 ∘C. (For water, 80. cal (334 J) is needed to melt 1 g of ice or must be removed to freeze 1 g of water and 540 cal (2260 J) is needed to convert 1 g of water to vapor at 100 ∘C.) How many kilojoules of heat were released?
A 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.
1. A plastic (k = 0.5 W/m K) pipe carries a coolant at -35 °C with a heat-transfer coefficient of 300 W/m².K. The pipe ID is 3 cm and the OD is 4 cm. The exterior pipe surface is exposed to air at 25°C with a heat-transfer coefficient of 20 W/m²K. Radiative heat transfer may be neglected in this problem. (a) Calculate the rate of heat transfer to the coolant per meter of pipe length. (b) Calculate the temperature of the exterior pipe surface.
Heat Transfer 176 Convection Ex. 3.15: air at 101.325 kPa and 308 K (35 °C) flows across a 50 mm diameter cylinder at a velocity of 50 m/s. The cylinder surface is maintained at a temperature of 423 K (150 °C). Estimate the heat loss per unit length of the cylinder. Data: The physical properties of air at the film temperature of 365.5 K are: H= 2.14 x 10-5 kg/(m-s), p = 0.966 kg/m³, k = 0.0312 W/(m-K) and Npr 0.695.
À wall of area 30 m² having a density of 1500 kg/m', thermal conductivity 30 W/m.K, and specific heat capacity 4 kJ/kg.K. The temperature distribution across a wall 0.5 m thick at a certain instant of time is given as T(x) = 30-5 x-7x The wall is generating a uniform heat (q.) of 1000 W. (1) Find the rate of heat transfer entering and leaving the wall (in W). (2) Find rate of energy stored in Watt. (3) Find (dFT/dx²) (4) Derive the change in temperature with respect to time equation (time rate of temperature change)- remember to substitute the value of (d T/dx²) from (part 3) and values of all other properties into final equation. %3D
5. Variable Heat Generation and Equation of Energy Change. A plane wall is insulated so that conduction occurs only in the x direction. The boundary conditions which apply at steady state are T = To at x = 0 and T = TL at x = L. Internal heat generation per unit volume is occurring and varies as q = ġ̟e-Ax/L, where do, and B are constants. Solve the general differential equation of energy change for the temperature profile. 1. Thermal and Hvdrodynamic Bounddary Laver Thicknesses Air at 294 3 K and
Design a vapor compression cycle using ammonia as the refrigerant thatwill be used to maintain the temperature of a stream at -20°C. The condenser is air-cooled and the ambient temperature may be assumed to be 25°C. Assume a compressor efficiency of 80% and allow for 2°C of temperature difference between streams in the evaporator and condenser for practical heat transfer.
A copper electric wire of radius R, = 1 mm is isolated by a layer of PVC so that the outer radius of the wire Rg = 2 mm, as shown in Figure below. The wire exchanges heat with the air at 20°C according to a heat transfer coefficient h=20 W/m2°c: Given that : k=copper electrical conductivity=4.0 × 1070hm-'m¯! kpvc= PVC thermal conductivity = 0.3- m°C kco = copper thermal conductivity = 100 m°C %3D (amp/m)² And that the electrical heating source is given by : S, amp²s /kgm³ If the temperature (T,) on the outer surface (r = RG) is 25°C, what is the electrical current C (amp) that passes through this wire? Dont forget to state your hypothesis clearly. Hi, Could you please tell me what the book's name is? Thank you!
1-The steady state temperatures distribution in a one-dimensional wall of thermal conductivity and thickness L is of the form T-ax3+bx+cx+d. derive expressions for the heat generation rate per unit volume in the wall and heat fluxes at the two wall faces(x=0, L). Find: expressions for the heat generation rate in the wall and the heat fluxes at the two wall faces(x=0, L).
A 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 heat transfer rate between the two fluids. Determine the outlet temperature of the water. Determine the heat transfer surface area. 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.

SEE MORE QUESTIONS

Recommended textbooks for you

Introduction to Chemical Engineering Thermodynami…

Chemical Engineering

ISBN:

9781259696527

Author:

J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:

McGraw-Hill Education

Elementary Principles of Chemical Processes, Bind…

Chemical Engineering

ISBN:

9781118431221

Author:

Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard

Publisher:

WILEY

Elements of Chemical Reaction Engineering (5th Ed…

Chemical Engineering

ISBN:

9780133887518

Author:

H. Scott Fogler

Publisher:

Prentice Hall

Introduction to Chemical Engineering Thermodynami…

Chemical Engineering

ISBN:

9781259696527

Author:

J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:

McGraw-Hill Education

Elementary Principles of Chemical Processes, Bind…

Chemical Engineering

ISBN:

9781118431221

Author:

Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard

Publisher:

WILEY

Elements of Chemical Reaction Engineering (5th Ed…

Chemical Engineering

ISBN:

9780133887518

Author:

H. Scott Fogler

Publisher:

Prentice Hall

Process Dynamics and Control, 4e

Chemical Engineering

ISBN:

9781119285915

Author:

Seborg

Publisher:

WILEY

Industrial Plastics: Theory and Applications

Chemical Engineering

ISBN:

9781285061238

Author:

Lokensgard, Erik

Publisher:

Delmar Cengage Learning

Unit Operations of Chemical Engineering

Chemical Engineering

ISBN:

9780072848236

Author:

Warren McCabe, Julian C. Smith, Peter Harriott

Publisher:

McGraw-Hill Companies, The

SEE MORE TEXTBOOKS