Compare and contrast the volumetric heat capacity ρCp and thermal diffusivity α of fire clay brick, plain carbon steel, copper, engine oil, water. Which material provides the greatest amount of thermal energy storage per unit volume? Which material would you expect to have the lowest cost per unit heat capacity?

A composite wall consisting of five series layers of materials with different properties. Layer thickness, thermal conductivity of the layers and temperatures are shown on the figure. Based on Fourier's law for conduction, answer the following questions. 1. What are the main assumptions? 2. Drive an equation to calculate the heat transfer rate through the Composite wall? 3. Draw the thermal circuit through composite wall? 4. What are the value Ti? 5. What are the value Tj? 6. What are the value Tr? Givens: KA = 2 W/m. °C KB = 1 W/m.°C Kc= 5 W/m. °C Kp= 4 W/m. °C 100°C Ti 25°C Tj Tr А C D +2cm + 6 cm- -4 cm 4cm

Air at dry ball temperature 80 ° C and RH 4% is passed over the cooling coil so that the air dry bulb temperature becomes 35 ° C. How much heat is released from the air in the process? = ... KJ / Kg