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Basic Concepts of Thermodynamics Notes, Study notes of Thermodynamics

Berry CollegeThermodynamics

Thermodynamics system, properties, Quasi-static process, laws of thermodynamics and concept of entropy

Typology: Study notes

2020/2021

Uploaded on 05/31/2021

judyth
judyth 🇺🇸

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 
   
             
     
  
  
        
   
  
       
           
          
        
         
          

           
             
                
          

        
            
            
           
          
      
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 

=

 (^)  

=

   

                                    

(^)    α       α                    

Pulley Thermometer Pulley

Z

W

Water Adiabatic vessel

Paddle

1

2 W (^) 1-2(In)

Q (^) 2-1(out)

V

P

                        

Σ (^)  (^) = Σ 

                                    

Engine E

Q

Heat source

Q = W

W

Heat source TH

QH

Engine E

Heat sink T 2

Q 2

A Possible Engine

W = Q (^) H – Q 2

An Impossible Engine

High temperature sink

Heat Pump or Refrigerator

W=

System boundary

Low temperature source

Impossible     

 

  ^ ^  

γ −

       

 −  =    (^) −   

       

 ^

 

 

  η = (^)  −   

 ^  

  

− η =



          

η = − = − = − =

       

                    

                               

Hot reservoir T 1

Reversible engine h=60%

100 kJ (^) 80 kJ

Irreversible energy =15% assumed

h

Cold reservior

40 kJ

(assumed) 20 kJ

Reversible engine

Irreversible energy

Cold reservoir T 2

40 kJ 25 kJ

100kJ

H =60 KJ w = 15 kJ

 

    

= (^) ∫  =

T 1

T

T 2

0

2

S1 S

1

S    

                                                            

  

   ^^  

= ×^ −

  

     

   

η =

= 

                    

                                                                        

   

    ^  

    ^  