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TOPIC: HEAT ENGINE
1
CONTENTS
• INTRODUCTION OF HEAT ENGINE
• EXPLANATION OF HEAT ENGINE
• EFFICIENCY OF HEAT ENGINE
• CLASSIFICATION OF ENGINE
• 3D MODEL OF STEAM ENGINE
• CARNOT ENGINE
• CARNOT CYCLE
• CARNOT EFFICIENCY
2
EXPLANATION OF HEAT ENGINE:
Let,
Q1= Heat transferred to the system
Q2= Heat rejected from the system
W1= Work done upon the system
W2= Work done by the system
The net heat transfer in a cycle to the Heat engine
Qnet = Q1-Q2
And net work transfer
Wnet = W2-W1
By the first law of thermodynamics
∑Q=∑W ……. For a closed cycle
Qnet = Wnet
or
Q1-Q2 = W2-W1
INTRODUCTION: HEAT ENGINE
• A heat engine cycle is a thermodynamic cycle in which there is a net heat
transfer to the system and a net work transfer from the system. The
system which executes a heat engine cycle is called a heat engine.
• It takes heat from a reservoir then does some work like moving a piston,
lifting weight, etc and finally discharges some heat energy into the sink.
A
GINE
k done by the
must be supplied to
le/total heat input
A
A
A
3
4
3D MODEL OF STEAM ENGINE
CARNOT ENGINE
• The efficiency of a typical automobile engine is
less than 30%.
• This seems to be wasting a lot of energy.
• What is the best efficiency we could achieve?
• What factors determine efficiency?
• The cycle devised by Carnot that an ideal engine
would have to follow is called a Carnot cycle.
• An (ideal, not real) engine following this cycle is
called a Carnot engine.
5
• Carnot engine is a theoretical thermodynamic
cycle proposed by Leonard Carnot.
• It gives the estimate of the maximum possible
efficiency that a heat engine during the
conversion process of heat into work and
conversely, working between two reservoirs, can
possess.
6
CARNOT EFFICIENCY

eC 
TH  TC
TH
7
Carnot’s Theorem & Carnot Cycle
8
MODEL
9
Model Video
10
REFERENCES:
11
Thank-You for your Valuable Time
and Attention
12

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Thermodynamics heat engine

  • 2. CONTENTS • INTRODUCTION OF HEAT ENGINE • EXPLANATION OF HEAT ENGINE • EFFICIENCY OF HEAT ENGINE • CLASSIFICATION OF ENGINE • 3D MODEL OF STEAM ENGINE • CARNOT ENGINE • CARNOT CYCLE • CARNOT EFFICIENCY 2
  • 3. EXPLANATION OF HEAT ENGINE: Let, Q1= Heat transferred to the system Q2= Heat rejected from the system W1= Work done upon the system W2= Work done by the system The net heat transfer in a cycle to the Heat engine Qnet = Q1-Q2 And net work transfer Wnet = W2-W1 By the first law of thermodynamics ∑Q=∑W ……. For a closed cycle Qnet = Wnet or Q1-Q2 = W2-W1 INTRODUCTION: HEAT ENGINE • A heat engine cycle is a thermodynamic cycle in which there is a net heat transfer to the system and a net work transfer from the system. The system which executes a heat engine cycle is called a heat engine. • It takes heat from a reservoir then does some work like moving a piston, lifting weight, etc and finally discharges some heat energy into the sink. A GINE k done by the must be supplied to le/total heat input A A A 3
  • 4. 4 3D MODEL OF STEAM ENGINE
  • 5. CARNOT ENGINE • The efficiency of a typical automobile engine is less than 30%. • This seems to be wasting a lot of energy. • What is the best efficiency we could achieve? • What factors determine efficiency? • The cycle devised by Carnot that an ideal engine would have to follow is called a Carnot cycle. • An (ideal, not real) engine following this cycle is called a Carnot engine. 5
  • 6. • Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. • It gives the estimate of the maximum possible efficiency that a heat engine during the conversion process of heat into work and conversely, working between two reservoirs, can possess. 6
  • 8. Carnot’s Theorem & Carnot Cycle 8
  • 12. Thank-You for your Valuable Time and Attention 12