In a room (6*5*4 m), if you have a thermal mass in a concrete floor with a thickness of 15 cm (concrete density = 2,250 kg/m3 and SHC= 0.21 kCal/oC.kg), knowing that the ∆Tswing = 4 oC, the occupant gains 3 kWhr/day, the equipment gains =5.5 kWhr/day and the lighting gains = 2.5 kWhr/day, the total heat loss = 30,865 Whr/day. Find the thermal capacity of the floor? What is the quantity of energy we can store in the floor in BTU? What will be the solar gain needed in order to store the previous energy and cover the day requirements?

In a room (654 m), if you have a thermal mass in a concrete floor with a thickness of 15 cm (concrete density = 2,250 kg/m3 and SHC= 0.21 kCal/oC.kg), knowing that the ∆Tswing = 4 oC, the occupant gains 3 kWhr/day, the equipment gains =5.5 kWhr/day and the lighting gains = 2.5 kWhr/day, the total heat loss = 30,865 Whr/day. Find the thermal capacity of the floor? What is the quantity of energy we can store in the floor in BTU? What will be the solar gain needed in order to store the previous energy and cover the day requirements?

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.4P: A plane wall 15 cm thick has a thermal conductivity given by the relation k=2.0+0.0005T[W/mK] where...

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Question

In a room (6*5*4 m), if you have a thermal mass in a concrete floor with a thickness of 15 cm (concrete density = 2,250 kg/m³ and SHC= 0.21 kCal/^oC.kg), knowing that the ∆T_swing = 4 ^oC, the occupant gains 3 kWhr/day, the equipment gains =5.5 kWhr/day and the lighting gains = 2.5 kWhr/day, the total heat loss = 30,865 Whr/day.

Find the thermal capacity of the floor?
What is the quantity of energy we can store in the floor in BTU?
What will be the solar gain needed in order to store the previous energy and cover the day requirements?

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