Determine the instantaneous heat transfer rate

Assignment Help Mechanical Engineering

Reference no: EM13710369

Consider a 1.25 cm diameter carbon steel (1% C, k = 40 W/m-K) sphere to be cooled from 500^oC to 100^oC by a cooling air flow at 25^oC with convection coefficient of 110 W/m2-K.

a) Determine the time required.

b) Determine the instantaneous heat transfer rate 2 minutes after the start of cooling.

c) Estimate the total energy transferred from the sphere during first 2 minutes.

Reference no: EM13710369

Questions Cloud

A slow leak developed in a tire : A slow leak developed in a tire (assume constant volume), in which it takes 3 hr for the pressure to decrease from 30 psig to 25 psig. The air volume in the tire is 0.5 ft3, and the temperature remains constant at 60 oF. The mass flow rate of the air..

Prepare a tax basis balance sheet for the partnership : Depreciated the building strait line over 30 years. The building represents 80% of the above allocation and land represents the remaining 20%. This apartment building was just completed - Jane has not previously operated it or taken any depreciati..

Present worth be better using the cash right : A Car Costs 25,000 dollars. You can buy it for cash for 21000 (right now) or buy it over time with a down payment of 8000 dollars and pay the remaining 17000 over 72 months at 12% interest compounded monthly.

About balloon with camera launched in space : Questions about balloon with camera launched in space... How can the angle with respect to north are measured. How can we make this system rotate physically while at high altitude? How can we measure the altitude of the system?

Determine the instantaneous heat transfer rate : Consider a 1.25 cm diameter carbon steel (1% C, k = 40 W/m-K) sphere to be cooled from 500oC to 100oC by a cooling air flow at 25oC with convection coefficient of 110 W/m2-K.

Entered and the pressure of the steam in the supple line : A 2-m^3 rigid insulated tank initially containing saturated water vapor at 1 MPa is connected through a valve to a supply line that carries steam at 400C. Now the valve is opened, and steam is allowed to flow slowly into the tank until the pressure i..

Determine the modulus of elasticity : For a logarithmic stress strain curve and find the strength coefficient and strain hardening exponent. Determine the modulus of elasticity. Determine the toughness.

Presentation of financial statements : Presentation of financial statements - Approaches to cost control: beyond budgeting

Dry saturated steam and super heated steam : Write a description of the generation of the following with reference to diagrams. Dry saturated steam. Super heated steam.

User Account

All Pages