A thermal energy storage unit consists of a large rectangular channel. which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage. 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 2 ⋅ K throughout the channel. How long will it take to achieve 75 % of the maximum possible energy storage? What is the temperature of the aluminum at this time?
A thermal energy storage unit consists of a large rectangular channel. which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage. 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 2 ⋅ K throughout the channel. How long will it take to achieve 75 % of the maximum possible energy storage? What is the temperature of the aluminum at this time?
Solution Summary: The author explains the time required to achieve 75% of maximum energy and temperature of aluminium at this time.
A thermal energy storage unit consists of a large rectangular channel. which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage.
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
2
⋅
K
throughout the channel. How long will it take to achieve
75
%
of the maximum possible energy storage? What is the temperature of the aluminum at this time?
A thermal energy storage unit consists of a large rectangular channel, which is wellinsulated on its outer surface and encloses alternating layers of the storage material andthe flow passage.Each layer of the storage material is an aluminum slab of width ? = 0.05 m, which is at aninitial temperature of 25°C. Consider conditions for which the storage unit is charged bypassing a hot gas through the passages, with the gas temperature and the convectioncoefficient assumed to have constant values of ?∞ = 600°C and ℎ = 100 W/m2– Kthroughout the channel. How long will it take to achieve 75% of the maximum possibleenergy storage? What is the temperature of the aluminum at this time?
In a solar collector 1 m wide by 4 m long, the glass cover plate at an average temperature of 29°C is spaced 40 mm from the absorber plate at an average temperature of 75°C. Estimate the convection heat loss coefficient from the absorber plate to the glass when the collector is positioned horizontally. What is the convection heat loss coefficient if the spacing reduced to 10 mm?
If I noticed copied solution I will give dislike.
In a solar collector 1 m wide by 4 m long, the glass cover plate at an average temperature of 29°C is spaced 40 mm from the absorber plate at an average temperature of 75°C. Estimate the convection heat loss coefficient from the absorber plate to the glass when the collector is positioned horizontally. What is the convection heat loss coefficient if the spacing reduced to 10 mm?
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.