analysis of heat exchanger by lmtd method
TRANSCRIPT
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ANALYSIS OF HEAT
EXCHANGER BY LMTD METHOD
PREPARED BY:-Urvesh Dungarani 140050119506
GUIDED BY:-Chetan K Gohil
BITS EDU CAMPUS
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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.
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Logarithmic mean temperature difference for “parallel flow”
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And 𝟏𝑪𝒄
=𝒕𝒄 𝟐−𝒕𝒄𝟏
𝑸
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∆ 𝑡𝑚=𝜃𝑚 𝑖𝑠 called the logarithmic meantemperature difference (LMTD)
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Logarithmic Mean Temperature Difference for “Counter Flow”
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=…………(2)
Equation (2) represents equation for LMTD for counter flow Heat exchanger.
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