Consider the air cooling system and conditions

Assignment Help Mechanical Engineering

Reference no: EM13946060

Consider conditions for which there is a uniform heat transfer rate per unit length, qi'= 1.25 X 105 W/m, from the exhaust gases to the pipe inner surface, while air flows through the annular passage at a rate of m· a = 2.1 kg/s. The thin-walled inner pipe is of diameter Di = 2 m, while the outer pipe, which is well insulated from the surroundings, is of diameter Do = 2.05 m. The air properties may be taken to be cp = 1030 J/kg · K, µ, = 270 X 10-7 N · s/m2, k = 0.041 W/m · K, and Pr = 0.68.

(a) If air enters at Ta,1 = 300 K and L = 7 m, what is the air outlet temperature Ta,2?

(b) If the airflow is fully developed throughout the annular region, what is the temperature of the inner pipe at the inlet (Ts,i,1) and outlet (Ts,i,2) sections of the device? What is the outer surface temperatureTs,o,1 at the inlet?

Reference no: EM13946060

Questions Cloud

Find the employee details on the basis of salary : Find the employee details on the basis of salary?

Where are the chromosomes located in a nucleus : Where are the chromosomes located in a nucleus? Viruses? Prokaryotes? Eukaryotes?

Differentiate between the presenting signs of symptoms : Differentiate between the presenting signs of symptoms of a 55-year-old suffering from acute bronchitis and a 55-year-old suffering from pneumonia. In your response, discuss the most typical community-acquired pathogens involved with each of these il..

Detailed description of a business situation : Your description of a business situation that presents a legal and ethical issue is clear and concise. You thoroughly addressed why your business situation is important for study using exceptional supporting ideas.

Consider the air cooling system and conditions : Consider conditions for which there is a uniform heat transfer rate per unit length, qi'= 1.25 X 105 W/m, from the exhaust gases to the pipe inner surface, while air flows through the annular passage at a rate of m· a = 2.1 kg/s.

What is the optimal number of warehouses for the firm : Suppose that the current market size is 250,000 customers, spread out over an area of 600 square miles. What is the optimal number of warehouses for the firm to operate?

What is the inner tube sur- face temperature : If the inner tube wall is heated electrically at a rate (per unit length) of q'= 4000 W/m, while the outer tube wall is insulated, how long must the tubes be for the water to achieve an outlet temperature of 85°C? What is the inner tube sur- f..

What is the cost variance, schedule variance and cpi : Use the CPI to calculate the estimate at completion (EAC) for this project. Is the project performing better or worse than planned?

Analyze the above statement in the context of singapore : Critically examine the above statement. Enumerate the general powers of Regulators and courts of law citing recent cases where action has been taken against firms in Singapore and elsewhere.

User Account

All Pages