Lecture36_Notes_S

Lecture36_Notes_S - Week 13 - Lecture 36 Introduction...

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Introduction Content Notes Suggested reading: SMITH, J.M. VAN NESS, H.C. and ABBOTT, M.M., Introduction to Chemical Engineering Thermodynamics , 7 th edition, McGraw-Hill Chapter 8 – pp. 290-296 How do we apply the 2 nd Law of Thermodynamics to heat engines? Definition of the system A very important source of power comes from the energy of chemical fuels. In conventional power plant, the molecular (chemical) energy of fuel is released by a combustion process. The function of the work- producing device is to convert part of the heat of combustion into mechanical energy. The steam power plant is a large-scale heat engine in which the working fluid (H 2 O) is in steady-sate flow successively through a pump, a boiler, a turbine and a condenser. The fluid goes through a cyclic process as shown by the following diagram. DIAGRAM : Description of the actual process steps : o Liquid water from a condenser is pumped into a boiler at elevated pressure o Heat from a fuel is transferred in the boiler to the water, converting it to high-temperature steam at the boiler pressure
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Lecture36_Notes_S - Week 13 - Lecture 36 Introduction...

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