435


too

400
S  300
^     200

100


,-

~—

—

^~

■^

"—

^~

^■~

^^

^—^

^^

"■"

■""

""

4

s

>

^

N

V

/

S,

/

s^

/

N

^    AVKIAfK   l.f f  -V

--]

—

—

—

—

—

■^

;-

—

—

—

/

"S^

i.il

-\

A

4-

"—

— —

—

—

—

— -

-~"

~~"

•""

A"

.-_

■~"

"""■

~~

"*■"■

^

— ""

"~"

■

>

s,

y

s

AVMAIC

I.H-v

/

Sr

"7

t

•  —

—

^

r—

1



--■■

—/

^

f^

•^

^^

A

0

tATIf  •.
MIIIMtM  Tt  AVCIAfC    1  Tf  1^
MIIIMiy  Tl   MAXiMVy   1  Tf  Lf
AVItAM   Tl  yAXMMI  1  Tf  r.i7

-

.••%           ...           4         V         .           .          «            .*"-4

-

TYPieAL    OAILY   LOAD   OURVC    UHIOM    TCRMINAL    STATIOi     OT.LOOIO.
i


WATU  PiWn  tCiUIIICf  WITH   00   AOXILIAIIY   POWER   00  OTORAOC


MWH


IWATCt

jfiaizci.  S^^^""-


OTORAOC  JNI_AUX III ARY   POWER   REQIIiREO.
RELATION     OF     POWER     8UPPLY     AND     DEMAND

Fig.  267.
Digitized  by


Google


43^  The  Load  Curve.
These  same  conditions  are  shown  both  by  diagram  C,  Fig.  268,
and  diagram  A,  Fig.  269.  In  the  latter,  with  water  power  above
the  average  load  of  the  plant,  the  peak  load  must  be  supplied  by
auxiliary  power,  although  more  water  power  than  would  be  suffi-
cient to  handle  it  is  daily  wasted.
Diagram  B,  Fig.  268,  shows  a  condition  with  low  water  power
no  storage  available,  and  the  power  less  than  the  average  load.  In
this  case  the  water  power  wasted  is  comparatively  small,  and  the
amount,  and  especially  the  capacity,  of  the  auxiliary  power  be-
comes large.
