Calculate the heat loss from a double-pane glass window consisting of two pieces of glass, each having a thickness of 10 mm with a thermal conductivity of k = 1.3 W/m.K . The two glass panes are separated by an air gap of 7 mm. Assume thermal conductivity of air to be k = 0.022 W/m.K .

Question 3.3 When the air with a pressure of 0.1 MPa and a specific volume of 0.8 m³/kg was provided into a compressor at a flow rate of 0.25 kg/s, its pressure became 0.7 MPa and its specific volume became 0.2 m³/kg. Through the compression, the specific internal energy was increased by 80 kJ/kg, and there was heat loss of 50 kJ/s to the environment. In this case, calculate the work [k]/s = kW] that the compressor did in unit time. Potential energy and kinetic energy can be negligible.

2) The temperature distribution in the square chimney is to be analyzed by the finite difference method. Determine the temperature at the nodes of the grid shown. T120 °C T-400 °C 6 cm 12 cm 18 cm