Answer to Question #344466 in Mechanical Engineering for Eyaaaah

Question

A rice hull furnace is to be designed to consume rice hull

at a rate of 5 sack/hour (10 kg/sack). If the furnace has an

outside dimension of 1 m wide x 1.5 m long x 1.2 m high,

what is the percentage heat loss by conduction from the

wall of the furnace? The wall is insulated by 8 in. thick brick

material. Inside and outside temperature are 400℃ and

40℃ , respectively.