Air enters a pipe at 65°C and 200 kPa and leaves at 60°C and 175 kPa. It is estimated that heat is lost from the pipe in the amount of 3.3 kJ per kg of air flowing in the pipe. The diameter ratio for the pipe is D1/D2 5 1.4. Using constant specific heats for air, determine the inlet and exit velocities of the air.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Air enters a pipe at 65°C and 200 kPa and leaves at
60°C and 175 kPa. It is estimated that heat is lost from the
pipe in the amount of 3.3 kJ per kg of air flowing in the pipe.
The diameter ratio for the pipe is D1/D2 5 1.4. Using constant
specific heats for air, determine the inlet and exit velocities
of the air.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 5 images
