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

1 according to rfc 1939 a pop3 session is in one of the

1. According to RFC 1939, a POP3 session is in one of the following four states: closed, authorization, transaction, or update. Draw a diagram to show these four states and how POP3 moves between them. 2. POP3 protocol h ...

The average heat evolved by the oxidation of foodstuffs in

The average heat evolved by the oxidation of foodstuffs in an average adult per hour per kilogram of body weight is 7.20 kJ kg-1 hr -1 . Assume the weight of an average adult is 62.0 kg. Suppose the total heat evolved by ...

A compute the intrinsic gate delay of the nmost given in

(a) Compute the intrinsic gate delay of the nMOST given in the above problem and also in section 661 at the biasing condition given above. (b) Compute the intrinsic power-delay product. (c) Does the load resistor increas ...

What must the bolts in a shear joint do to prevent its

What must the bolts in a shear joint do to prevent its failure? Describe some of the factors that make it difficult to create an exact and predicted amount of clamping force during assembly? How does an external load on ...

A solid circular rod of known radius is twisted in a

A solid circular rod of known radius is twisted in a testing machine with a known torque T. Only one strain gage is available. Does each of the test setups below give us enough information to determine the shear modulus ...

Name at least three reasons why some bolts fail

Name at least three reasons why some bolts fail mechanically? What is the most common cause of bolted joint misbehavior or failure? Name at least two problems that can be caused by overtightening the bolts? What do we me ...

A critical bolted joint in a nuclear power plant requires a

A critical bolted joint in a nuclear power plant requires a specific bolt preload. The access prevents a direct, accurate measurement of the actual bolt preload. It is planned to use a UNF 7/16-20 bolt with a root diamet ...

A for the system of fig 347 the resistance of each line

a. For the system of Fig. 3.47, the resistance of each line cannot exceed 0.006 Ω, and the maximum current drawn by the load is 110 A. What gage wire should be used? b. Repeat (a) for a maximum resistance of 0.003 Ω, d = ...

In the actual combustion of benzene in an engine the af

In the actual combustion of benzene in an engine the A/F ratio was 12/1. Calculate the analysis of the wet products of combustion

1 the hypodermic needle shown below contains a liquid serum

1. The hypodermic needle shown below contains a liquid serum (ρ = 1 g/cm 3 ). If the serum is to be injected steadily at 6 cm 3  /s, how fast should the plunger be advanced (a) if leakage in the plunger clearance is negl ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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