Answer:
No
Explanation:
Heat engines are used for converting the heat into mechanical energy which is used for doing mechanical work.
The efficiency of heat engine is the fraction of mechanical energy to the thermal energy. The efficiency can not be 100% as some of the energy always loss due to friction and motion of the body parts of the heat engine.
Answer:
<em><u>Hii</u></em><em><u> </u></em><em><u>Dear</u></em><em><u> </u></em><em><u>!</u></em><em><u>!</u></em><em><u>!</u></em><em><u> </u></em>
<em><u>How</u></em><em><u> are</u></em><em><u> you</u></em><em><u> </u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
<em><u>I</u></em><em><u> </u></em><em><u>hop</u></em><em><u>e</u></em><em><u> </u></em><em><u>That</u></em><em><u> </u></em><em><u>you</u></em><em><u> are</u></em><em><u> </u></em><em><u>Fine</u></em><em><u> </u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
Explanation:
<em><u>So</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>_</u></em><em><u>_</u></em><em><u>d</u></em><em><u>o</u></em><em><u>e</u></em><em><u>s</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em>
Answer:
A) i) 984.32 sec
ii) 272.497° C
B) It has an advantage
C) attached below
Explanation:
Given data :
P = 2700 Kg/m^3
c = 950 J/kg*k
k = 240 W/m*K
Temp at which gas enters the storage unit = 300° C
Ti ( initial temp of sphere ) = 25°C
convection heat transfer coefficient ( h ) = 75 W/m^2*k
<u>A) Determine how long it takes a sphere near the inlet of the system to accumulate 90% of the maximum possible energy and the corresponding temperature at the center of sphere</u>
First step determine the Biot Number
characteristic length( Lc ) = ro / 3 = 0.0375 / 3 = 0.0125
Biot number ( Bi ) = hLc / k = (75)*(0.0125) / 40 = 3.906*10^-3
Given that the value of the Biot number is less than 0.01 we will apply the lumped capacitance method
attached below is a detailed solution of the given problem
<u>B) The physical properties are copper</u>
Pcu = 8900kg/m^3)
Cp.cu = 380 J/kg.k
It has an advantage over Aluminum
C<u>) Determine how long it takes a sphere near the inlet of the system to accumulate 90% of the maximum possible energy and the corresponding temperature at the center of sphere</u>
Given that:
P = 2200 Kg/m^3
c = 840 J/kg*k
k = 1.4 W/m*K
You can pick the song Cover me in sunshine- By pink
- <em>This</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>very</em><em> </em><em>beautiful</em><em> </em><em>song</em><em> </em><em>that</em><em> </em><em>describes</em><em> </em><em>happiness</em><em>.</em>
- <em>I</em><em> </em><em>feel</em><em> </em><em>happy</em><em> </em><em>when</em><em> </em><em>I</em><em> </em><em>listen</em><em> </em><em>to</em><em> </em><em>this</em><em> </em><em>song</em><em> </em><em>because</em><em> </em><em>it</em><em> </em><em>shows</em><em> </em><em>the</em><em> </em><em>connection</em><em> </em><em>between</em><em> </em><em>a</em><em> </em><em>mother</em><em> </em><em>and</em><em> </em><em>daughter</em><em>.</em>
- <em>Also</em><em>,</em><em> </em><em>The</em><em> </em><em>song</em><em> </em><em>compares</em><em> </em><em>Sunshine</em><em> </em><em>with</em><em> </em><em>Happiness</em><em>.</em>
Given:
Pressure, = 1300 kPa
Temperature, =
= 100 kPa
velocity, v = 40 m/s
A = 1
Solution:
For air propertiess at
= 1300 kPa
=
= 793kJ/K
=
and also at
= 100 kPa
= 401 KJ/K
=
a) Mass flow rate is given by:
Now,
= 46.51 kg/s
b) for the power produced by turbine,
= 18.231 MW