Dissipates heat by free convection

Assignment Help Mechanical Engineering
Reference no: EM13719873

A thin long electric heater of width 20 cm is placed with its width oriented vertically. It dissipates heat by free convection from both sides of its surface into air at 20C. If the heater should not exceed 225C, determine the length of the heater in order to dissipate 1000 W safely

Reference no: EM13719873

Questions Cloud

What is the mass flow rate of steam through the turbine : Consider a small simple Rankine Power cycle which produces 600kW power from an electric generator with an efficiency of 95%. The steam leaves the boiler at 1250psia as superheated steam and leaves the turbine at 2 psia with a quality of 90%.
Vapor compression refrigeration cycle : A vapor compression refrigeration cycle has a theoretical COP of 4.8 and provides 120,000 btu/h of cooling (same as 10 tons of cooling). The compressor is driven by a motor with an efficiency of 92%. Estimate the theoretical kW electrical demand that..
Dam is to be built such that the estimated average flow : The dam is to be built such that the estimated average flow over its crest will be Q = 3000 m^3/s. Determine the required flow over the crest of a model built to a scale of 1/25
What is the entropy generation in the process : A thermodynamicist is attempting to model the process of balloon inflation by assuming that the elastic casing behaves like a spring opposing the expansion as presented in the figure. As air is admitted, the spring is compressed.
Dissipates heat by free convection : A thin long electric heater of width 20 cm is placed with its width oriented vertically. It dissipates heat by free convection from both sides of its surface into air at 20C. If the heater should not exceed 225C, determine the length of the heater in..
The total heat transfer rate from the plate to the air : Air at 40C flows over a 2m long flat plate with a free stream velocity of 7 m/s. Assume the width of the plate (into the paper) is 0.5m. If the plate is at constant temperature of 100C,
Air undergoes an isentropic process : Air undergoes an isentropic process from P_1 = 100 kPA and T_1 = 300 K to a final state where the temperature is 700 K. Assuming an ideal gas, find P_2 in kPa using both the ideal gas tables and assuming a constant specific heat ratio at the average ..
What could be done to limit or deny these lawsuits : In the prison system of today, inmates are overburdening the courts with lawsuits. What could be done to limit or deny these lawsuits?
Explain the development of prisons used criminal offenders : Before the development of prisons, physical punishments were commonly used on criminal offenders. Discuss if corporal punishments would again serve a purpose in dealing with some of today's offenders. Give examples

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  Find the magnitude of the acceleration

Find the magnitude of the acceleration at ((x,y,z,t=(-2,-1,1,0) Assume that u=0, v=0, find the position of the fluid particle along the z-axis as a function of time, what would be the position at time t=infinity?

  The plate centered directly on top of the pedestal the

a flat plate of 15x39 and 0.125 thick sits on an a pedestal that has a surface area of 80 in2 10x8. the plate centered

  Compute the energy equation flux of the gas

A specific point during the re-entry flight of the Space Shuttle has the following condition: Mach number of 15.93, static pressure of 20 Pa, and static temperature of 245 K. Assuming that air is a calorically perfect gas and that this condition is s..

  The nuts are tightened untill the comppressive force in the

a steel rod 20mm diameter is passesthrough a brass tube 25mm internal diameter and 30mm external diameter. the tube is

  Consider hydrogen to be ideal gas with constant specific

hydrogen gas at 35ordmc and unknown pressure state 1 enters a steady insulated system which has no work interaction

  When loaded the gages read 1900 -700 and 240 300

an equiangular strain gage rosette is mounted on a free and unloaded surface of a part made of steel. when loaded the

  Find the exit temperature and the energy destruction

A flow of 1 kg/s air at 300 K is mixed with a flow of 2 kg/s air at 1500 K in an insulate pipe junction at a pressure of 100 kPa. Find the exit temperature and the energy destruction.

  Is there an economic case for renewable energy

Is there an economic case for renewable energy? This issue was recently a "hot topic" in the news, and you are referred to the following newspaper article for a representation from the media.

  Determine the time taken for the crate to come to a rest

Determine the time taken for the crate to come to a rest and the distance travelled if the coefficient of dynamic friction is 0.4

  An ice chest is constructed of 04 mm thick plain-carbon

an ice chest is constructed of 0.4 mm thick plain-carbon steel plate a 1.9 cm thick layer of styrofoam k0.033 wm c and

  Heat in the amount of 100 kj is transferred directly from a

1. air is compressed by a 30 kw compressor from p1 to p2. the air temperature is maintained constant at 25 oc

  The potential across the unit is 0800 v the heat input to

a thermoelectric generator consists of a series of semiconductor elements heated on one side and cooled on the other.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd