What is the maximum allowable electric current i

Assignment Help Mechanical Engineering

Reference no: EM131151026

An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter 1mm, electrical resistivity 10-6 O m, k=25 W/m K and e=0.2. The heater is designed to deliver air at a temperature of 50°C under flow conditions that provide a convective coefficient of 250 W/m2K for the wire. The temperature of the housing that encloses the wire and through which the air flows is 50°C if the maximum allowable temperature of the wire is 1200°C, what is the maximum allowable electric current I? If the maximum available voltage if 110 V, what is the corresponding length of the wire that may be used in the heater and the power rating of the heater? Assume negligible temperature variations within the wire.

Reference no: EM131151026

Questions Cloud

Determine the force-couple system with the force : The table can be lifted without tilting by applying the 100-N force at pointO, the center of the table. Determine the force-couple system with the force acting at cornerAthat will produce the same result.

How union pacific will be affected by external factors : Union Pacific Corporation" Please respond to the following: Describe how Union Pacific will be affected by each of these external factors

What was sub cos total net income for the year : How much was Parent Co.'s share of Sub Co.'s net income for the year? How much was Parent Co.'s share of Sub Co.'s dividends for the year? What was Sub Co.'s total net income for the year? What was Sub Co.'s total dividends for the year?

Determine the number of fins that needs to be attached : If it is desired to triple the rate of heat transfer from the bare hot surface, determine the number of fins that needs to be attached.

What is the maximum allowable electric current i : what is the maximum allowable electric current I? If the maximum available voltage if 110 V, what is the corresponding length of the wire that may be used in the heater and the power rating of the heater? Assume negligible temperature variations w..

Explain six competencies of leadership described in article : Describe how Maidique and others gathered the information for this article. In your own words, outline and explain the six competencies of leadership described in the article as you understand them

Review the concept and details of computing gdp : Review the concept and details of computing GDP (GDP.pptx). Then listen to an excellent discussion of GDP and a variety of issues involved in computing GDP, including ones that are part of this week's discussion: GDP Discussion.

Create a design for change proposal : Create a Design for Change proposal inclusive of your PICO and evidence appraisal information from Capstone Project Milestone.

What is the most recent rate of growth of the country : What is the most recent rate of growth of the country and how does it compare to the economic growth rate for the same year in the United States?

User Account

All Pages