5.16 A thermal energy storage unit consists of a large rectan- gular channel, which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage. Storage material Hot gas T, h Each layer of the storage material is an aluminum slab of width W = 0.05 m, which is at an initial temperature of 25°C. Consider conditions for which the storage unit

5.16 A thermal energy storage unit consists of a large rectan- gular channel, which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage. Storage material Hot gas T, h Each layer of the storage material is an aluminum slab of width W = 0.05 m, which is at an initial temperature of 25°C. Consider conditions for which the storage unit

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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.

Question

5.16 A thermal energy storage unit consists of a large rectan-
gular channel, which is well insulated on its outer
surface and encloses alternating layers of the storage
material and the flow passage.
Storage
material
Hot gas
Te, h
Each layer of the storage material is an aluminum slab
of width W = 0.05 m, which is at an initial temperature
of 25°C. Consider conditions for which the storage unit
is charged by passing a hot gas through the passages,
with the gas temperature and the convection coefficient
assumed to have constant values of T = 600°C and
h = 100 W/m? · K throughout the channel. How long
will it take to achieve 75% of the maximum possible
energy storage? What is the temperature of the alu-
minum at this time?

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