What is the log mean temperature difference in deg C of a double-piped counterflow heat exchanger where a fluid enters at 90 deg C and exits at 50 deg C? Inside the inner pipe, another fluid enters at 20 deg C and exits at 60 deg C. Select the correct response: 35 75 30

What is the log mean temperature difference in deg C of a double-piped counterflow heat exchanger where a fluid enters at 90 deg C and exits at 50 deg C? Inside the inner pipe, another fluid enters at 20 deg C and exits at 60 deg C. Select the correct response: 35 75 30

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

Related questions

Q: (a) Sketch the system and its boundary, with all the given data displayed on it. (b) Draw the…

A: For solution refer below images.

Q: Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine.…

A: To find: One of the steps is not required to find the required length of the Heat exchanger.

Q: na heat exchanger an unknown gas with molecular weight of 30, K = 1.32 enters the eat exchanger at…

Q: A certain liquid has an SG of 1.34 and flows through a 7-in diameter tube at 1.9 f/s. Calculate the…

A: Given Data V=1.9 ft/s = 0.579 m/s D=7 in = 0.1778 m S=1.34

Q: A batch centrifugal filter having a bowl diameter of 750 mm and a bowl height of 450 mm is used to…

A: Given Bowl diameter = 750 mm Bowl height = 450 mm Temperature = 25o C Solid concentration = 60g/L…

Q: Design Heat Exchanger Sell side Water Fluid condition Component Flow rate (kg/hr) Temperature in(°C)…

A: Given For shell side Temperature, T1 = 25oC T2 =…

Q: Q#01: Write down the functions of the following parts/accessories used with the equipment in heat…

A: Solution: Note: Dear Student! As per our guidelines, we are only allowed to answer three sub-parts…

Q: Ke'd TS+1 Considering a change in inlet temperature show why a 1st order model for a CSTR and a dead…

A: Given in Question :- R=radius K= conductivity C= specific heat

Q: Choose the wrong statement Heat exchanger problems can be solved by effectiveness or log mean…

A: The heat exchanger problem can be solved in two ways first is LMTD and the second is effectiveness…

Q: Question 5.7 In a parallel flow heat exchanger, hot fluid enters the heat exchanger at a temperature…

Q: Check the box belongs to its respective objective(s). Multiple answers could be selected To…

A: given; demonstration of the relationship between power input and surface temperature in forced…

Q: Water (Cp = 4200 J/kg. °C) is used cool an unknown fluid (with a given Cp = 3810 J/kg.ºC) using a…

A: Find the maximum heat transfer between the fluids.

Q: 6. A simple air cooled system is used for an aeroplane to take a load of 10 tons. Atmospheric…

A: Consider the diagram shown below for the simple air refrigeration cycle. Given data:

Q: In the process of freeze drying, ice goes directly into water vapor. What is the temperature at…

A: Option (a) at the triple point of water Is correct option

Q: For the pasteurization process, the cold milk with a 4°C temperature value enters the first heat…

A: a) Process control elements : Controlled variable : Steam flow rate Measured variable : Temperature…

Q: 2- The sensible neat gain of a given space is 50 kW and its latent load is 15 kW. The inside design…

Q: Derive a and b (shown to the right) for the S-N line from 10 to 10 cycles. Given: at N=10° cycles,…

Q: 6. A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb…

Q: 4222N1 1234 5 Homework Problems 7-6 The results of pilot filter experiments are summarized in the…

Q: A potential energy change of 1 kJ/kg corresponds to an elevation difference of 102 m. Devices like…

A: 1) THE GIVEN STATEMENT IS FALSE we know that potential energy per kg = h*g ; where h=…

Q: A Liquid-to-Liquid counter flow heat exchanger is used as part of an auxiliary system at the…

A: GIVEN DATA - INLET TEMPRATURE OF HOT FLUID Th1=260'C EXIT TEMPRATURE OF HOT FLUID Th2=204.44'C INLET…

Q: A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb…

A: Given; A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs…

Q: Question 10 of 20 G/E is Select the correct response: 3(1-2v) O 0.33(1-2v) O 2(1+v) O 0.5(1+v)

A: GIVEN DATA- A QUESTION FROM ELASTIC CONSTANT TOPIC WE HAVE TO TELL WHAT IS THE RATIO OF G/E

Q: What is the equipments used in the experiment H3 Check the box belongs to its respective equipment.…

A: Solution: The correct options and necessary explanation is given below:

Q: Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine.…

A: A concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas…

Q: heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat…

Q: Q.5 A pump circulates water through a closed pipe network connecting a water heater and a heating…

Q: Completely solve and box the final answer. Write legibly Diesel flows at the rate of 3 kg/sec…

Q: Steam enters a counter-flow heat exchanger, dry saturated at 10 bar and leaves at 350°C. The mass…

Q: A heat exchanger has an over-all coefficient of heat transfer of 900 W/m2-K. The mean temperature…

A: Given data, Q= 15000 W U= 900 W/m²K ΔΤm=20°C Let A be the surface area,

Q: Completely solve and box the final answer. Write legibly 6. A counterflow heat exchanger is…

A: To find: The log mean temperature difference. Given: The inlet temperature of hot flue gas is…

Q: A type K , chromel-alumel, thermocouple has a hot-junction temperature of 237 oC and a cold junction…

A: GivenTh=237°CTc=28°CAsketVout=?

Q: 100 kg / h tomato paste sterilized in the heat treatment section of an aseptic packaging unit is…

A: Write the given information.

Q: Consider a pressure surge system (as shown below) to reduce the effect of pressure variations at a…

A: I think there's a small mistake in the equation i.e, the value 'R' is given in the denominator. But…

Q: Water flows at the rate of 65 kg/min through a double pipe counter flow HX. water is heated from…

A: Answer: (a) The rate of heat transfer is 113370.8333 W. (b) The required number of tubes is 26.

Q: Water (Cp = 4200 J/kg- °C) is used cool an unknown fluid (with a given Cp = 3810 J/kg.°C) using a…

Q: 3. In a shell & tube heat exchanger, total rate of heat transfer between the shell- side and the…

A: Q=UA∆T Total uncertainty in heat transfer, ∆Q/Q=∆U/U+∆A/A+∆(∆T)/∆T Percentage uncertainty is..…

Q: A car engine runs at f = 1000. rpm. A type J-thermocouple with D = 0.10 mm is placed in one of its…

A: A car engine runs at f = 1000 rpm. A type J-thermocouple with D = 0.10 mm is placed in one of its…

Q: For an inlet valve, the mass flow rate through the valve is 0.44 kg/s. The flow coefficient is 0.62…

Q: Water (Cp = 4200 J/kg. °C) is used cool an unknown fluid (with a given Cp = 3810 J/kg.°C) using a…

Q: 1. A heat exchanger is located on the roof of a warehouse to heat the air in winter. It is a…

Q: A heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat…

Q: A six-cylinder refrigerant 22 compressor operating at 29 r/s indicate a refrigerating capacity of…

A: A six-cylinder refrigerant 22 compressor operating at 29 r/s indicate a refrigerating capacity of…

Q: Water flows at the rate of 65kg/min through a double pipe counter flow HX. Water is heated from…

Q: Completely solve and box the final answer. Write legibly. 7. A superheated steam is used in a…

Q: The Repeatability of the thermocouple, which work in the range of 10-170 C with the following…

A: Given Data: Range of the thermocouple, 10-170 C

Q: able Q3 is given to collect the temperature of hot and cold water at the inlet and outlet positions…

Q: 11.50 In a supercomputer, signal propagation delays are reduced by resorting to high-density circuit…

Q: A radiator heat exchanger is to be designed for the following specifications. Hot gas at 1145°C,…

A: In general, there are three modes by which heat gets transferred from one place to another. The…

Q: ii) An engineer proposed the following design for the heat recovery system. Above the pinch Below…

A: First, we have to understand what is a heat recovery system. A heat recovery system is a method…

Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

Question

What is the log mean temperature difference in deg C of a double-piped counterflow heat exchanger where a fluid enters at 90 deg C
and exits at 50 deg C? Inside the inner pipe, another fluid enters at 20 deg C and exits at 60 deg C.
Select the correct response:
35
75
30

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

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
3. In a shell & tube heat exchanger, total rate of heat transfer between the shell- side and the tube-side is given as Q=UAAT . Find the uncertainty percent in to- tal rate of heat transfer using the following data: U = 500 Btu/ft²-h ± 5 Btu/ft²-h, A = 1000 ft² ± 2.5 ft², AT = 75 F ± 2 F.
An air-cooled condenser has an expected U value of 30 based on the air-side area. The m²-k condenser is to transfer 60 kW with an airflow rate of 15 kg/s entering at 35°C. If the condensing temperature is to be 48°C, what is the required air-side area? Recall Cp,air = 1.0- kg-K kJ
Refrigerant condenses in the tubes of a cross flow heat exchanger at 41 °C, 16.7 MJ/hr is rejected form the refrigerant by air "c= 1005 J/kg.K". Air enters at 24 °C and leaves at 37 ;c. What is heat transfer area of the refrigerant side (m) when the overall heat transfer coefficient refrigerant side on the is 151 W/m".°C? Hint use LMTD method and assume a correction coefficient of 100%
1:52 > le C:/Users/MEGA/Downloads/Cengel.%20Heat%20and%20mass%20Transfer%20Fundame FIGURE P11-79 11-80E A single-pass crossflow heat exchanger is used to cool jacket water (c, = 1.0 Btu/lbm-°F) of a diesel engine from 190°F to 140°F, using air (c, = 0.245 Btu/lbm-°F) with an inlet temperature of 90°F. Both airflow and water flow are unmixed. If the water and air mass flow rates are 92,000 lbm/h and 400,000 lbm/h, respectively, determine the log mean tem- perature difference for this heat exchanger. D Air flow - (unmixed) Water flow (unmixed) X FIGURE P11-80E 11-81 A single-pass crossflow heat exchanger with both flu- ids unmixed has water entering at 16°C and exiting at 33°C. while oil (c,= 1.93 kJ/kg-K and p=870 kg/m) flowing at 0.19 m³/min enters at 38°C and exits at 29°C. If the surface area of the heat exchanger is 20 m² determine the value of the f O 1 tu e 11 th ex 11 the ex 11 the flu the 11- rate flo ids the 11- excl be f 11- In o is no 11- exch cold 3
Using Double Integration Method
20 stages of MSF-M with the following main parameters: intake: 1500 kg/s, 35,000 ppm, 20 C; blow down brine: 38 C, 69,000 ppm recycle brine about 79% of blow down brine steam supplied to brine heater: 2kg/s, 115 C The top brine temperature : 100 C performance ratio: 8.5 calculate all the characteristics of the system for first stage (x, tin, tout, Tin, Tout, Mdi, Mbi, TVi, Ai, Ab and the width and the length
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
11.50 In a supercomputer, signal propagation delays are reduced by resorting to high-density circuit arrange- ments which are cooled by immersing them in a special dielectric liquid. The fluid is pumped in a closed loop through the computer and an adjoining shell-and-tube heat exchanger having one shell and two tube passes. Coolant loop Heat exchanger Computer Two Pump During normal operation, heat generated within the com- puter is transferred to the dielectric fluid passing through the computer at a flow rate of rm, = 4.81 kg/s. In turn, the fluid passes through the tubes of the heat exchanger and the heat is transferred to water passing over the tubes. The dielectric fluid may be assumed to have constant proper- ties of c, = 1040 J/kg • K, µ= 7.65 × 10-4 kg/s•m, k = 0.058 W/m K, and Pr= 14. During normal opera- tion, chilled water at a flow rate of ri, = 2.5 kg/s and an inlet temperature of Twj = 5°C passes over the tubes. The water has a specific heat of 4200 J/kg ·K and provides…
3:57 A Done lecture 7_b5ee35c08478147bb8a3744a... Lec. (7) tar -Dry bulb temperature O Example (1): An air conditioning equipment (figure) have the following: - Supply air mass-1.26 kg/s. The cooling coil receives 20 % outdoor air and 80% return air. tdz Fig. 18.14. Representation of supply air condition and room design condition. 0.252 kg/s Refrigeration and A/C - Outdoor air conditions are: 28°C db, 19.5°C wb Return air conditions are: 22°C db, 50% RH. The mixture air condition outlet the cooling coil are: 10°C db, 0.00735 kg/kgda Draw the system on the Psychrometric chart, then calculate: 1. Cooling coil load. 2. Room sensible heat. 3. Room latent heat. 4. Fresh (outdoor) load. 5. Duct and fan heat gain 6. Sensible heat ratio SHR. If the supply air temperature increases with a value 1°K due to fan motor heat gain and 2°K due to duct heat gain. . ← 1.008 kg/s R to Dr. Omar M. Ali LTE الغرفة المراد تكييفها (22,50 %) 1.26 kg/s R Grand Sensible Heat Factor It is defined as the ratio of…
6. A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb per cu ft, and its specific heat is 0.24. Assume a controlled temperature differential of 5° and heater potential of 110 volts. Plot the velocity as abscissa and amperage as ordinate for veloc- ity 0 to 300 ft per min. Assume constant amperage of 3, and plot tem- perature difference against velocity. Discuss the curves from the stand- point of accuracy of the system. J: よ itet legeted oulindriool oir tube
1. Figure 1 below shows a stirred tank heating process-with a constant holdup volume. Assume mass flow rate w, of the inlet pipe is constant whereas its temperature T fluctuates but the product temperature T must be maintained within set temperature tolerances about the reference. Heater Figure 1: Stirred heating tank process