Heat and mass transfer, engineering, Other Engineering

1. Air at 1 atm, 90F, and 8 ft/s enters a thin-walled tube of 4-in diameter. The tube surface temperature is maintained at 60F. Air exits the tube at 70F. Determine the length of the tube required to accomplish this process. Work in English units!

2. A box 15-cm by 50-cm at a constant surface temperature of 35C is exposed to ambient air from all sides except the base (50cm by 50 cm in a horizontal plane). The ambient air is 1 atm, 25C. Estimate the natural convection heat loss from the top of the surface as well as the side surface

3. Air at 1 atm, 25C and 8 m/s is to be heated by an in-line tube-bank with 3 rows in the flow direction and 4 tubes in each row. The outside diameter of the tubes is 0.012m with a length of 0.2 m. The surface temperature of the tubes is maintained at 350 C. Taking the air properties at 35C, calculate:

a. The air temperature and heat transfer

b. The air pressure drop across the tube-bank

Posted Date: 3/29/2012 8:33:31 AM | Location : United States







Related Discussions:- Heat and mass transfer, engineering, Assignment Help, Ask Question on Heat and mass transfer, engineering, Get Answer, Expert's Help, Heat and mass transfer, engineering Discussions

Write discussion on Heat and mass transfer, engineering
Your posts are moderated
Related Questions
An investment project provides cash inflows of $730 per year for eight years. What is the project payback period if the initial cost is $3,500? What if the initial cost is $5,000?

Replacement Analysis In the previous chapter we have compared various investment alternatives. Two scenarios were considered: single alternative and a set of mutually exclusive

Ask question #Minimum lkjhbi mbj jhb uy 100 words accepted#

JFET OPERATION Figure shows the operation of a JFET. The JUGFET has a physical structure that can be represented by the diagram shown in Figure. In Figure, if the N-Ty

Write a decision table that specifies the rules for the game of checkers.

A speed control system has an amplifier-motor-control element capable of maintaining a speed of 4000 rpm at the output shaft with no external load and an input of 8 mV to the ampli

Plasma Arc Welding (PAW) is a special form of gas tungsten arc welding in which constricted plasma arc is directed at the weld area. In PAW, a tungsten electrode is contained in a

Phase detector Phase detector (PD) consists of a multiplier and a low pass filter. The output of the PD has a magnitude proportional to V s cos 2 φ  where φ is the phase shif

(a)  Explain briefly any five roadway elements. Include function and current practices used in the design of these elements. (b)  Discuss any three emerging (i.e. 'Intelligent T

I am having difficulty with algebra pertaining toengineering