Horace and John Dodge founded the Dodge Brothers Company in Detroit in 1900, and quickly found work manufacturing precision engine and chassis components for the city's growing number of automobile firms. Chief among these customers were the established Olds Motor Vehicle Company and the new Ford Motor Company.
The effectiveness for a heat exchanger is 0.6428.
<u>Explanation:</u>
a) Sketch the temperature profiles for a 50% and 80% effectiveness heat exchanger.
The heat transfer type was not mentioned.
Assume the heat exchanger which is counter flow and the heat exchanger performance is high.
In the cold fluid stream, the 80% of effective heat exchanger compares the 50% of heat exchanger.
The diagram was attached below.
b) The effectiveness for a heat exchanger is calculated.
Given data
= 2 lb/s
= 160 F
= 4 lb/s
= 110 F
= 20 F
ε =
From tables,
= 1.001 Btu / lb ° F
×
= 1.001 × 2
= 2.002
= 0.24 Btu / lb ° F
= ×
= 0.24 × 4
= 0.96
ε =
=
ε = 0.6428
Answer:
Final mass of Argon= 2.46 kg
Explanation:
Initial mass of Argon gas ( M1 ) = 4 kg
P1 = 450 kPa
T1 = 30°C = 303 K
P2 = 200 kPa
k ( specific heat ratio of Argon ) = 1.667
assuming a reversible adiabatic process
<u>Calculate the value of the M2 </u>
Applying ideal gas equation ( PV = mRT )
P₁V / P₂V = m₁ RT₁ / m₂ RT₂
hence : m2 = P₂T₁ / P₁T₂ * m₁
= (200 * 303 ) / (450 * 219 ) * 4
= 2.46 kg
<em>Note: Calculation for T2 is attached below</em>