h thermal
off
gan
=
Source
⑪ Th
= QH =
Coeff of performance w He =W
EQ Ew
Ref
=
W
the better . h
larger =
QH
Q Q
b
>
-
Little work needed + w = +
Copp
to
produce Q
⑭ Sink
=
6
W
⑭
= Qout- Qin
Qin =
Qout-w
-31w closed
4
Qin
Pg Pla
G
=
COP
I
=
Wir
⑮ > system
o
I
* Prace =
Pa
closed
-
bac
system returns to start
cycle
*T
>
-
in
going
-
no mass
0
fu uz uz 0
= = =
only energy xu
-
g w
= -
2
Specific
- *
ref cycle * & Q =
QH Q =W
-M
-
-
no work out
YQH Q = W
Total
-
refrigeration de QH =
W + Q
net work is () =>
cy
P bar
,
③
Thermodynamic Cycle 3
process
=
chemefengine t
*
L
S ⑧ ② expansion
-
-
- (7) I-
isobaric
put
M
work
Pg A
in =
>
- =
compression
,
o
I
.
DV 0
WFQH
=
isovolumetric 100% psi
=
>
-
O
not possible
I ↳ Compression Wie =
=mu
m3
O when
objecta highest p . .
(t)kJ Qi2 =
14 , 2 Wiz KE = PE
Wexp
= +
Q23 =
Al23 + Was
= W Consi
of energy -k2 + xPE 0
=
Whet + +
Wa . Dual =
Qui -
Was ·
=
Par Dur Aes Anzi (pdv Pau = = + + = o
KE ,
+
Pg ,
+ PEe ,
+ PEs ,
=
KEz +
P
/parEPatriaa
at
specific pt. a
V == = specific Val. if assume
& const
W
·
= Piston-cylinder Th
2=
I
density Exponent Q2 =
Du + Wiz
m -Find
PV-PV
=
,
1 -
n Wiz + Was + Wal
Pr
P
=Cim (Fras
Pow
(n(p) n(n))
PV &
=
Qin
un Wayce
=
em
(n(P2/P)
i
i
-H (n (v/vz)
(PV) ⑭
=
lemp 2 =
find w- plug into Q = Bu+ W Heat Transfer H
An =
X(Tz Ti -
Qout =
Qin+ Win
property Bhu/lb Q
*
state process >
-
R = W + man
, ,