engineering recuitment GATE ME 2023-24 Test Series Heat Transfer Heat Exchanger Heat Exchanger Analysis
LMTD for a heat exchange is given by, (Where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit)
1
\(\frac{{{\rm{\Delta }}{t_2} - {\rm{\Delta }}{t_1}}}{{\log \left( {\frac{{{\rm{\Delta }}{t_2}}}{{{\rm{\Delta }}{t_1}}}} \right)}}\)
2
\(\frac{{{\rm{\Delta }}{t_2} - {\rm{\Delta }}{t_1}}}{{\log \left( {\frac{{{\rm{\Delta }}{t_1}}}{{{\rm{\Delta }}{t_2}}}} \right)}}\)
3
\(\log\left(\frac{{{\rm{\Delta }}{t_1} - {\rm{\Delta }}{t_2}}}{{\frac{{{\rm{\Delta }}{t_1}}}{{{\rm{\Delta }}{t_2}}}}}\right)\)
4
\(\log\left(\frac{{{\rm{\Delta }}{t_1} - {\rm{\Delta }}{t_2}}}{{\frac{{{\rm{\Delta }}{t_2}}}{{{\rm{\Delta }}{t_1}}}}}\right)\)