1. Engineering
  2. Mechanical Engineering
  3. under conditions for which the same room temperature is maintained...

Question: under conditions for which the same room temperature is maintained...

Question details

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. Consider a room whose air temperature is maintained at 18°C throughout the year, while the walls of the room are nominally at 28°C and 16°C in the summer and winter, respectively. The exposed surface of a person in the room may be assumed to be at a temperature of 32°C throughout the year and to have an emissivity of 0.90. The coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 W/m2.K. Calculate the following Heat flux due to convection: 7conv Heat flux due to radiation in the summer: W/m2 W/m2 Heat flux due to radiation in the winter: W/m2

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution