HEAT TRANSFER CHAPTER 11 Heat Exchangers 们au Heat Transfer Su Yongkang School of Mechanical Engineering
Heat Transfer Su Yongkang School of Mechanical Engineering # 1 HEAT TRANSFER CHAPTER 11 Heat Exchangers
Heat Exchangers. LMTD Method Where we’ ve been.. So far have focused on detailed heat transfer analysis of specific conditions, such as external heat transfer coefficient Where we’ re going: Investigate methods for larger system level anal ysis that combine all these modes of heat transfer in heat exchangers Heat Transfer Su Yongkang School of Mechanical Engineering
Heat Transfer Su Yongkang School of Mechanical Engineering # 2 Heat Exchangers, LMTD Method Where we’ve been …… • So far have focused on detailed heat transfer analysis of specific conditions, such as external heat transfer coefficient Where we’re going: • Investigate methods for larger system level analysis that combine all these modes of heat transfer in heat exchangers
Heat Exchangers. LMTD Method KEY POINTS THIS LECTURE Types of heat exchangers, advantages and di Isad vantages Overall heat transfer coefficient concept of fouling factor Log mean temperature difference Application of lmtd to heat exchanger anal ysis Text book sections: $11.1-11.3 Heat Transfer Su Yongkang School of Mechanical Engineering
Heat Transfer Su Yongkang School of Mechanical Engineering # 3 Heat Exchangers, LMTD Method KEY POINTS THIS LECTURE • Types of heat exchangers, advantages and disadvantages • Overall heat transfer coefficient, concept of fouling factor • Log mean temperature difference • Application of LMTD to heat exchanger analysis • Text book sections: §11.1 – 11.3
Heat Exchanger Types Aout B. Bout 个个个↑ Am山广00 ↑↑↑1 Example B in Heat Transfer Su Yongkang School of Mechanical Engineering
Heat Transfer Su Yongkang School of Mechanical Engineering # 4 Heat Exchanger Types TA,in TA,in TA,out TB,in TB,out TA,out TB,in TB,out TA,in TA,out TB,in TB,out Example:
Heat Exchanger Types(Contd Shell and tube: (common in chemical process industry) B. Shell side Shell and tube A,in(tube side) TBin(shell side) A, in(tube side) A out Shell and Tube out Bin(shell side) Aout Shell and tube A (tubeside) B out Heat Transfer Su Yongkang School of Mechanical Engineering
Heat Transfer Su Yongkang School of Mechanical Engineering # 5 Heat Exchanger Types (Cont’d) TB,out (shell side) TB,in (tube side) TA,in TA,out Shell and Tube: (tube side) TA,in TA,out (shell side) TB,in TB,out Shell and Tube: Shell and Tube: (shell side) TB,in TB,out (tubeside) TA,in TA,out Shell and Tube: (common in chemical process industry)