It is desired to reduce this by a factor of 100 while

Assignment Help Mechanical Engineering

Reference no: EM13641751

The heat input to a cold box is to be reduced by adding extruded polystyrene sheets (p=55kg m^-3 , k=0.027W m^-1 K^-1 , Cp= 1.21kJ kg^-1 K^-1) to all sides. The box is 3 feet on a side and all sides are in contact with air. When the box is placed in a constant-temperature room which is maintained at 70 degrees F, the heat loss is 40,000Btu h^-1. It is desired to reduce this by a factor of 100 while maintaining the inside temperature at -30 degrees F. Find the appropriate insulation thickness in inches.

Reference no: EM13641751

Questions Cloud

Given the returns and probabilities for the three possible : given the returns and probabilities for the three possible states listed here calculate the covariance between the

If a typical pad is 50cm thick and compresses by 20cm : falls resulting in hip fractures are a major cause of injury and even death to the elderly. typically the hips speed at

Identify three situations where the measured output of a : identify three situations where the measured output of a process has a small variation and three situations where the

Why when dealing with two independent samples where you : why when dealing with two independent samples where you cannot assume the population variances are equal should the

It is desired to reduce this by a factor of 100 while : the heat input to a cold box is to be reduced by adding extruded polystyrene sheets p55kg m-3 k0.027w m-1 k-1 cp

Determine the rotation rate in revolutions per second : the 20-g centrifuge at nasas ames research center in mountain view california is a horizontal cylindrical tube 58 ft

Find the thermal conductivity in wm-1 k-1 and thermal : find the thermal conductivity in wm-1 k-1 and thermal diffusivity m2s-1 for a new insulating material for which the

According to the american cancer society melanoma a form of : 1 according to the american cancer society melanoma a form of skin cancer kills 15 of americans who suffer from the

B determine the maximum velocity attained by the collar a : the system is released from rest in the position shown. the masses of the collar a and the box b are ma 90 kg and mb

User Account

All Pages