A composite wall is made up of 10 cm of common brick against 15cm of concrete with 1.5 cm of plaster on inside of wall. Assume still air in room at 25 °C. The outside air at 40 °C the wind velocity is 25 km/hr. Note: Use standard tables for values of thermal conductivities and film co-efficient. Find: a) The thermal resistance of wall b) The overall heat transfer cop-efficient. c) The steady state heat transfer rate per unit area of wall d) Heat transfer if the outside and inside film resistances are disgraded
A composite wall is made up of 10 cm of common brick against 15cm of concrete with 1.5 cm of plaster on inside of wall. Assume still air in room at 25 °C. The outside air at 40 °C the wind velocity is 25 km/hr. Note: Use standard tables for values of thermal conductivities and film co-efficient. Find: a) The thermal resistance of wall b) The overall heat transfer cop-efficient. c) The steady state heat transfer rate per unit area of wall d) Heat transfer if the outside and inside film resistances are disgraded
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A composite wall is made up of 10 cm of common brick against 15cm of concrete with 1.5 cm of plaster on inside of wall. Assume still air in room at 25 °C. The outside air at 40 °C the wind velocity is 25 km/hr. Note: Use standard tables for values of thermal conductivities and film co-efficient. Find: a) The thermal resistance of wall b) The overall heat transfer cop-efficient. c) The steady state heat transfer rate per unit area of wall d) Heat transfer if the outside and inside film resistances are disgraded
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