Internal temperature of the sphere

Assignment Help Chemical Engineering

Reference no: EM13943813

QUESTION - 6 A Hollow steel sphere contains 100 watt electrical filament inside it for heating. The other relevant data are as follows-
Internal and external radius of the sphere = 0.24 and 0.32 m respectively.
Inner and outer surface film coefficient = 30 and 10 kcal /hr .m² .^oc respectively.
Thermal resistance of the metal is negligible and steady heat transfer to be assumed.

Find out the
Part -a - internal temperature of the sphere, if its outside temperature is 22 ^oc.
Part - b - increase in inside temperature of the sphere, if it is lagged by 0.025 m thick magnesia of thermal conductivity 0.055 kcal /hr.m .^oc while the surface film heat transfer co-efficient remain unchanged.

Reference no: EM13943813

Questions Cloud

Compute the amount of cash collected from customers : Singleton Inc. had accounts receivable of $365,000 at January 1, 2009, and $410,000 at December 31, 2009. Compute the amount of cash collected from customers.

Determine the rotation angle of the second degree of freedom : Determine the rotation angle of the second degree of freedom, theta2, that must be used to bring the effector to the specified configuration.

Compute the amount of cash payments to suppliers : Blackmon Company reported net income of $805,000 and cost of goods sold of $1,525,000 on its 2009 income statement. Compute the amount of cash payments to suppliers.

Examine the website and locate treatment plans : Conduct an Internet search using the words addiction treatment plan. Reference your state's department of health and human services. Examine the website and locate treatment plans, sometimes abbreviated as ITPs (individual treatment plans)

Internal temperature of the sphere : A Hollow steel sphere contains 100 watt electrical filament inside it for heating. The other relevant data are as follows- Internal and external radius of the sphere = 0.24 and 0.32 m respectively.

Compute the amount of cash payments for operating expenses : Luna Inc. reported operating expenses of $130,000, excluding depreciation expense of $36,000 for 2009. Compute the amount of cash payments for operating expenses.

Heat loss per hour per meter run of pipe : A horizontal steel pipe having inner and outer diameter as 150 and 180 mm respectively is lagged with 50 mm thickness of 85% magnesia insulation inside ,which has flue gas flowing at 260oc

Complete the following tasks for this project : Before you begin, open the Sweatshirt.doc document and review it. Notice that data has been added indicating what size t-shirt is needed for each individual attending the high school reunion.

Recreate journal entries necessary to record the transaction : Recreate the journal entries necessary to record the transactions. Indicate whether each transaction increased cash, decreased cash, or had no effect on cash.

User Account

All Pages