Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Mechanical Engineering Expert

problem 1: Figure below shows a scale drawing of the temperature profile through a composite plane wall.

a) Identify the layer with the largest thermal conductivity,
b) Identify the layer that provides the greatest resistance to the flow of heat.

State any suppositions made and describe your answers.   

2200_temperature profile.jpg

Figure: Temperature profile via a composite plane wall

problem 2: A 3kW electric water heater is a cylindrical element containing outside diameter 10mm. The heat transfer between the heater and the surrounding water is 980W/m2K.

Find out the length of the heater if the surface temperature must not surpass 95oC when the water is at 65oC.

The element includes an electric resistance heater, diameter 2mm in the centre of the 10mm diameter stainless steel tube that has a wall thickness of 1mm. The gap between the resistance heater and within of the tube is packed with a ceramic material, Thermal conductivity 2W/mK.

Find out the temperature of the electric heater element. You might supppose that the heater element is at uniform temperature and the thermal resistance between the element and the ceramic is negligible. The thermal conductivity of the stainless steel is 16W/mK

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M9959

Have any Question? 


Related Questions in Mechanical Engineering

Engineering skills project brief flume Engineering Skills Project Brief: Flume Ride

Engineering Skills Project Brief: Flume Ride Introduction Employers are constantly asking for engineering graduates who have good team skills, are problem solvers and are good communicators. On top of that, engineers nee ...

1 determine the capillary rise for a water-air-glass

1. Determine the capillary rise for a water-air-glass interface at 40°C in a clean glass tube having a radius of 1 mm. 2. Determine the difference in pressure between the inside and outside of a soap film bubble at 20 °C ...

Assigned work clearly indicate all assumptions and

Assigned Work (Clearly indicate all assumptions and references) 1. A 500 m 2 light colored swimming pool is located at (a) normal suburban site, (b) well-sheltered site, where the measured wind speed at 10 m height is 3 ...

For the bar in problem 1112 find the largest allowable

For the bar in Problem 11.12, find the largest allowable value of P if the allowable compressive stress is 250 MPa. Problem 11.12: A steel bar with the cross section shown and effective length L = 2.5 m is subjected to a ...

A sample containing 421 g of ar is enclosed in a container

A sample containing 42.1 g of Ar is enclosed in a container of volume 0.0885 L at 375 K. Calculate P using the ideal gas, van der Waals, and Redlich-Kwong equations of state. Based on your results, does the attractive or ...

Define prying action sketch an alternative joint diagram

Define prying action? Sketch an alternative joint diagram showing the effects of prying action Name at least two things the joint designer can do to reduce prying action? This and the following three questions are all in ...

1 the v-shaped tank has width w into the paper and is

1. The V-shaped tank has width w into the paper and is filled from the inlet pipe at volume flow Q. Derive expressions for (a) the rate of change dh/dt and (b) the time required for the surface to rise from h 1  to h 2 . ...

Consider the top part of the balloon to be half of a

Consider the top part of the balloon to be half of a spherical pressure vessel. What is the ratio of the normal stress across a vertical seam to the normal stress across a seam inclined 45 degrees?

1 a square gate 4 m by 4 m is located on the 45deg face of

1. A square gate, 4 m by 4 m, is located on the 45° face of a dam. The top edge of the gate is 8 m below the water surface. Determine the resultant force of the water on the gate, and the point through which it acts. 2. ...

The solution to problem isshow that bernoullis equation

The solution to Problem is Show that Bernoulli's equation applied between sections 1 and 2 does not give this result. Derive all expressions for the change in total head across a hydraulic jump. Problem:- As can often be ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen