2. IND
EX
HEAT ENGINES
HEAT ENGINE
CYCLES
CARNOT CYCLE
RANKINE CYCLE
OTTO CYCLE
DIESEL CYCLE
3. A heat engine is a
system that converts
heat or thermal
energy and chemical
energy to mechanical
energy, which can
then be used to do
mechanical work. It
does this by bringing
a working substance
from a higher state
temperature to a
lower state
temperature.
6. 1. Working fluid is the perfect gas.
2. Piston cylinder arrangement is weightless and does not
produce friction during motion.
3. The walls of cylinder and piston are considered as
perfectly insulated .
4. Compression and expansion are reversible.
5. The transfer of heat does not change the temperature of
source or sink.
10. 1. All the devices are teats as steady flow energy device.
2. Kinetic and potential energy changes are neglected.
3. Expansion in turbine and pump are assume as reversible
adiabatic process/ isentropic process.
11. Reversible adiabatic expansion
0f steam in turbine (1-2)
Heat rejection at p=C in
condenser (2-3)
Reversible adiabatic expansion
of liquid in pump (3-4)
Heat supplied at p=C in boiler
(4-1)