Superheated steam at an average temperature 200°Cis transported through a steel pipe (k = 50 W/m·K, Do 5 8.0cm, Di = 6.0 cm, and L = 20.0 m). The pipe is insulated with a4-cm thick layer of gypsum plaster (k = 0.5 W/m·K). Theinsulated pipe is placed horizontally inside a warehousewhere the average air temperature is 10°C. The steam andthe air heat transfer coefficients are estimated to be 800 and200 W/m2·K, respectively. Calculate (a) the daily rate of heattransfer from the superheated steam and (b) the temperatureon the outside surface of the gypsum plaster insulation.
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.
Superheated steam at an average temperature 200°C
is transported through a steel pipe (k = 50 W/m·K, Do 5 8.0
cm, Di = 6.0 cm, and L = 20.0 m). The pipe is insulated with a
4-cm thick layer of gypsum plaster (k = 0.5 W/m·K). The
insulated pipe is placed horizontally inside a warehouse
where the average air temperature is 10°C. The steam and
the air
200 W/m2·K, respectively. Calculate (a) the daily rate of heat
transfer from the superheated steam and (b) the temperature
on the outside surface of the gypsum plaster insulation.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 4 images
