. sider the composite solid shown. Solid A is a ther mally conductive material that is 0.5-cm thick and has a thermal conductivity, KA = 50 W/m K. The back side of solid A (x = 0) is thermally insulated. Electrical current is applied to solid A such that 20 W per cm³ is generated as heat. Solid B is 0.2-cm thick and has a thermal conductivity of kB = 20 W/m K. The surface of solid B is exposed to air. The surface temperature, Ts, of solid B is 80 C. The bulk air temperature is constant at 30 C. The process is at steady state. . a. What is the heat-transfer rate per unit area (flux) at x = L₂? What is the temperature T₁ at x = L₁, the boundary between solid A and solid B? b. What is the required convective heat-transfer coefficient, h, for the flowing air? C. What is the temperature To at x = 0, the insulating side of solid A?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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please show all steps Q17.30

10,
n-
nd
is
ric
ed
K.
cat
On
es
al.
nd
te
nt
of
ne
gen, and organic nutrients maintained at
30 C. The bottom face of the tissue is thermally insulated. At
present, the specific oxygen consumption of the tissue mass is
0.5 mmol O₂/cm³ cells-hr, and from respiration energetics, the
energy released by respiration is 468 J/mmol O₂ consumed. We
are interested in knowing the temperature at the bottom face of
the tissue next to the insulated boundary. If this temperature
remains below 37 C, the tissue will not die. The thermal
conductivity of the tissue scaffold is k = 0.6 W/m.K.
a.
b.
c.
a.
Using the information given predict the temperature profile
within the tissue slab the slab.
1730 Consider the composite solid shown. Solid A is a ther-
mally conductive material that is 0.5-cm thick and has a thermal
conductivity, kA = 50 W/m K. The back side of solid A (x = 0)
is thermally insulated. Electrical current is applied to solid A such
that 20 W per cm³ is generated as heat. Solid B is 0.2-cm thick and
has a thermal conductivity of kg = 20 W/m K. The surface of
solid B is exposed to air. The surface temperature, Ts, of solid B
is 80 C. The bulk air temperature is constant at 30 C. The
process is at steady state.
What is the heat generated per unit volume of tissue?
Estimate the temperature at x = L (the insulated
boundary).
C.
What is the heat-transfer rate per unit area (flux) at x = L₂?
What is the temperature T₁ at x = L₁, the boundary between
solid A and solid B?
b. What is the required convective heat-transfer coefficient, h,
for the flowing air?
What is the temperature To at x = 0, the insulating side of
solid A?
Transcribed Image Text:10, n- nd is ric ed K. cat On es al. nd te nt of ne gen, and organic nutrients maintained at 30 C. The bottom face of the tissue is thermally insulated. At present, the specific oxygen consumption of the tissue mass is 0.5 mmol O₂/cm³ cells-hr, and from respiration energetics, the energy released by respiration is 468 J/mmol O₂ consumed. We are interested in knowing the temperature at the bottom face of the tissue next to the insulated boundary. If this temperature remains below 37 C, the tissue will not die. The thermal conductivity of the tissue scaffold is k = 0.6 W/m.K. a. b. c. a. Using the information given predict the temperature profile within the tissue slab the slab. 1730 Consider the composite solid shown. Solid A is a ther- mally conductive material that is 0.5-cm thick and has a thermal conductivity, kA = 50 W/m K. The back side of solid A (x = 0) is thermally insulated. Electrical current is applied to solid A such that 20 W per cm³ is generated as heat. Solid B is 0.2-cm thick and has a thermal conductivity of kg = 20 W/m K. The surface of solid B is exposed to air. The surface temperature, Ts, of solid B is 80 C. The bulk air temperature is constant at 30 C. The process is at steady state. What is the heat generated per unit volume of tissue? Estimate the temperature at x = L (the insulated boundary). C. What is the heat-transfer rate per unit area (flux) at x = L₂? What is the temperature T₁ at x = L₁, the boundary between solid A and solid B? b. What is the required convective heat-transfer coefficient, h, for the flowing air? What is the temperature To at x = 0, the insulating side of solid A?
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