in this prsentation i derived heat exchanger by using LMTD mrthod with counter flow and parallel flow

1. ANALYSIS OF
HEAT
EXCHANGER BY
LMTD METHOD
PREPARED BY:-
Urvesh Dungarani 140050119506
GUIDED BY:-
Chetan K Gohil
BITS EDU CAMPUS

2. LOGARITHMIC MEAN TEMPERATURE
DIFFERENCE(LMTD)
• Defination:Logarithmic mean temperature
difference is define as that temperature
difference which,if constant,would give the
same rate of heat transfer as actually occur
under variable condition of temperature
difference.
• With help of LMTD ,the value of temperature
at any length of heat exchanger or vice versa
is easily available.

3. Logarithmic mean temperature
difference for “parallel flow”

6. And
𝟏
𝑪 𝒄
=
𝒕 𝒄𝟐 − 𝒕 𝒄𝟏
𝑸

7. ∆𝑡 𝑚= 𝜃 𝑚 𝑖𝑠 called the logarithmic mean temperature difference (LMTD)

8. Logarithmic Mean Temperature
Difference for “Counter Flow”

11. 𝜃 𝑚=
𝜃2−𝜃1
ln(
𝜃2
𝜃1
)
=
𝜃1−𝜃2
ln(
𝜃1
𝜃2
)
…………(2)
Equation (2) represents equation for LMTD for counter flow Heat exchanger

12. THANK
YOU