(Solved): A thin square plate heater (15cm15cm) is placed between two slabs as shown in Figure Q2. Slab ...

A thin square plate heater $$(15\mathrm{cm}\times 15\mathrm{cm})$$ is placed between two slabs as shown in Figure Q2. Slab A with thermal conductivity of $$45\mathrm{W}/\mathrm{m}.\mathrm{K}$$ ) has thickness of $$2.5\mathrm{cm}$$ while slab $$\mathrm{B}$$ is $$1.5\mathrm{cm}$$ thick and thermal conductivity of $$0.2\mathrm{W}/\mathrm{m}.\mathrm{K}$$. The outside convective heat transfer coefficient on side $$\mathrm{A}$$ and $$\mathrm{B}$$ are $$180\mathrm{W}/\mathrm{m}2\mathrm{K}$$ and $$45\mathrm{W}/{\mathrm{m}}^2\mathrm{K}$$, respectively. The temperature of the surrounding air is $$25^{?}\mathrm{C}$$. Based on the specification given by the manufacturer, the power rating of this plate heater is $$1\mathrm{kW}$$. Evaluate: (a) Maximum temperature in the system (b) Outer surface temperature of two slaps (CO2 : PO2 - 15 marks)