1. a) A furnace wall is composed of 220 mm of fire brick, 150 mm of common brick, 50 mm of 85% magnesia and 3 mm of steel plate on the outside. If the inside surface temperature is 1500°C and outside surface temperature is 90°C, estimate the temperatures between layers and calculate the heat loss in kW/h.m². Given, k (for fire brick) = 4kJ/m.hr.K k (for common brick) = 2.8 kJ/m.hr.K k (for steel) = 240 kJ/m.hr.K k (for 85% magnesia) = 0.24 kJ/m.hr.K

1. a) A furnace wall is composed of 220 mm of fire brick, 150 mm of common brick, 50 mm of 85% magnesia and 3 mm of steel plate on the outside. If the inside surface temperature is 1500°C and outside surface temperature is 90°C, estimate the temperatures between layers and calculate the heat loss in kW/h.m². Given, k (for fire brick) = 4kJ/m.hr.K k (for common brick) = 2.8 kJ/m.hr.K k (for steel) = 240 kJ/m.hr.K k (for 85% magnesia) = 0.24 kJ/m.hr.K

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.68P

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

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