Ground cherry seeds need to be planted at a depth of 1-cm below the surface and will only germinate if their surrounding soil is at a temperature of 24-30°C. Farmer Joe wants to know whether adding straw mulch (mulch = 0.05 W/m K, Lmulch = 10 cm) on top of his soil will increase the odds of germination. The topsoil in Deleware is sandy loam (2soil = 0.5 W/m-K), with a thickness of 1 m. Immediately beneath the topsoil is the subsoil, which is at a constant temperature of Tsubsoil = 10°C. You can assume that the air in Deleware is fairly calm, with a heat transfer coefficient of h = 10 W/m².K. deleware (a) Sketch the system (with and without mulch), labeling all temperatures, dimensions, and proportionality constants. You may assume that the subsoil, topsoil, mulch, and air are at steady state. You should have two sketches.

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Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.3DP
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On separate graphs, sketch the heat flux and temperature as a function of position (from
the air to the subsoil), with and without mulch. Make sure that your sketches reflect that
the system is at steady-state and account for the relative magnitudes of the thermal
and heat transfer coefficient. You don't need to calculate any
for these graphs.
17
conductivities
temperatures
Transcribed Image Text:On separate graphs, sketch the heat flux and temperature as a function of position (from the air to the subsoil), with and without mulch. Make sure that your sketches reflect that the system is at steady-state and account for the relative magnitudes of the thermal and heat transfer coefficient. You don't need to calculate any for these graphs. 17 conductivities temperatures
- Ground cherry seeds need to be planted at a depth of 1-cm below the surface and will only
germinate if their surrounding soil is at a temperature of 24-30°C. Farmer Joe wants to know
whether adding straw mulch (Amulch = 0.05 W/m K, Lmulch = 10 cm) on top of his soil will
increase the odds of germination.
The topsoil in Deleware
is sandy loam (soil = 0.5 W/m K), with a thickness of 1 m.
Immediately beneath the topsoil is the subsoil, which is at a constant temperature of Tsubsoil =
10°C. You can assume that the air in Deleware
is fairly calm, with a heat transfer coefficient
of h
= 10 W/m².K.
deleware
(a) Sketch the system (with and without mulch), labeling all temperatures, dimensions, and
proportionality constants. You may assume that the subsoil, topsoil, mulch, and air are at
steady state. You should have two sketches.
Transcribed Image Text:- Ground cherry seeds need to be planted at a depth of 1-cm below the surface and will only germinate if their surrounding soil is at a temperature of 24-30°C. Farmer Joe wants to know whether adding straw mulch (Amulch = 0.05 W/m K, Lmulch = 10 cm) on top of his soil will increase the odds of germination. The topsoil in Deleware is sandy loam (soil = 0.5 W/m K), with a thickness of 1 m. Immediately beneath the topsoil is the subsoil, which is at a constant temperature of Tsubsoil = 10°C. You can assume that the air in Deleware is fairly calm, with a heat transfer coefficient of h = 10 W/m².K. deleware (a) Sketch the system (with and without mulch), labeling all temperatures, dimensions, and proportionality constants. You may assume that the subsoil, topsoil, mulch, and air are at steady state. You should have two sketches.
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