Power, Energy, Work, And Efficiency

#1Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 979

2.) Joule’s law: P= izr, where P is the rate at which

#2Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 982

3.) The power equation : P0 = ei, where P0 is the

#3Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1140

2. Joule’s law: P = ^^r, where P is the power, or the rate at

#4Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1240

2.) Joule’s law : P= i^r, where P is the rate at which

#5Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1249

The e.m.f. consumed by resistance r is EI = 7r, thus the

#6Four Lectures on Relativity and SpaceLecture 2: Conclusions From The Relativity Theory- line 2367

The kinetic energy of 1 kg. weight of matter, Eq = mc^,

#7Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1274

Thus the alternating current i = IQ since 0 consumes in a resist-

#8Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1317

E = V2 *fn$,

#9Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1326

E = 7 \/2

#10Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1378

the current / = omn = 44.2 amperes effective.

#11Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1385

r = - - -rT^ - ” = 0.71 ohms per circuit.

#12Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1393

(Id = 0.82 cm.), 45 cm. apart, transmitting the output of this

#13Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1414

E = A/2 */ $

#14Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1494

T = e3 = ^T

#15Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1520

e1 = 0.2 E + 2 X

#16Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1527

e2 = 2 ei - 0-3 irE,

#17Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1355

5. In Joule’s law, P = i^r, r is not the true ohmic resistance,

#18Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1446

5. In Joule’s law, P = /^r, r is not the true ohmic

#19Theory and Calculation of Electric CircuitsChapter 6: Magnetism- line 11137

mechanical energy t^o =Fl by (1), and therefrom the mechanical

#20Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1143

3. The power equation: Po = ei, where Po is the power

#21Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1243

3.) The power equation : P^ = ei, where P^ is the

#22Four Lectures on Relativity and SpaceLecture 2: Conclusions From The Relativity Theory- line 2320

This energy, for y = 0, or the mass at rest, becomes:

#23Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1250

power consumed by resistance r is P = 72r.

#24Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1292

Since E0 = 2 irfn$, it follows that

#25Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1425

or, since 0 = 2 irft = 210 t we have,

#26Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1465

ei = 0.8 e;

#27Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1470

ez = | ei = 0.4 ire,

#28Theory and Calculation of Alternating Current PhenomenaChapter 1: Introduction- line 1187

5. In Joule’s law, P = i2r, r is not the true ohmic

#29America and the New EpochChapter 3: The Individualistic Era: From Competition to Co-operation- line 1214

give an annual loss of $40 -$ 33 = $7, or 7 per

#30Four Lectures on Relativity and SpaceLecture 2: Conclusions From The Relativity Theory- line 2345

energy of mass,” is £“00 = mc”-.

#31General Lectures on Electrical EngineeringLecture 3: Light And Power Distribution- line 1259

gives 4 X ; = jg or altogether ^ + ^ = jg of the

#32General Lectures on Electrical EngineeringLecture 3: Light And Power Distribution- line 1440

or glof 4 = 24 » ^^’^ so gives a total copper economy of

#33Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1278

The value / = -7= is called the effective value of the alter-

#34Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1401

effective gives 44.2\/2 = 62.5 amp. maximum.

#35Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1406

3, as 2 $= 0.188 X 106/, or$ = 0.094 X 106/ for each wire.

#36Theory and Calculation of Electric CircuitsChapter 6: Magnetism- line 11272

and since 1 joule = 10^ absolute units, the mechanical work is

#37General Lectures on Electrical EngineeringLecture 16: The Incandescent Lamp- line 9753

16 x .79 = 12.6 c. p., and at an efficiency of 3.1 watts per

#38Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1300

= 4.44 fn& ;

#39Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1355

= 4.44 X 0.333 X 360 X 6.4

#40Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1356

= 3400 volts per circuit.

#41Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1367

= 5900 volts effective.

#42Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1388

X 0.71 = 1400 watts per circuit, or a total of 3 X 1400 = 4200

#43Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1411

$ = 22.3 X 62.5 X 0.094 X 106 = 131 megalines.

#44Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1416

= 4.44 X 0.333 X 131

#45Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1496

= 1.006;

#46Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1523

= 0.6 E.

#47General Lectures on Electrical EngineeringLecture 17: Arc Lighting- line 12171

power of 5 X 10* K. W. Estimating the energy of the discharge,

#48Theory and Calculation of Electric CircuitsChapter 1: Electric Conduction. Soled And Liquid- line 1500

thus must be such that e volts times 1 amp.-sec, or e watt-sec. or

#49Theory and Calculation of Electric CircuitsChapter 6: Magnetism- line 11124

energy produced, + increase of the stored magnetic energy. (1)

#50Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1477

FIG. 8. - E.m.f. of a single conductor, direct-current machine

#51Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1372

1.8 X 10~6, what is the e.m.f. consumed in the machine by the

#52Theory and Calculation of Electric CircuitsChapter 6: Magnetism- line 11423

output, or the efficiency of the electromagnet, thus is, by (22)

#53General Lectures on Electrical EngineeringLecture 3: Light And Power Distribution- line 1471

Fife. 13. Single-Phase Llfehtlnfe and Three-Phnse Power.

#54General Lectures on Electrical EngineeringLecture 16: The Incandescent Lamp- line 9728

life of 500 hours; since obviously any efficiency can be pro-

#55Theory and Calculation of Electric CircuitsChapter 6: Magnetism- line 11458

32.4 gram-cm. pull per volt-ampere suppUed to its terminals.

#56America and the New EpochChapter 3: The Individualistic Era: From Competition to Co-operation- line 1222

cost, to $33, as the loss thereby incurred, of

#57America and the New EpochChapter 3: The Individualistic Era: From Competition to Co-operation- line 1223

7 per cent., is less than the loss in standing idle.

#58General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 1607

LOAD FACTOR AND COST OF POWER 53

#59General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 1884

For instance, Fig. 14 shows an approximate load curve

#60General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 1888

LOAD FACTOR AND COST OF POWER 55

#61General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 2338

shape shown in Fig. 16: fairly constant from the opening

#62General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 2345

LOAD FACTOR AND COST OF POWER 57

#63General Lectures on Electrical EngineeringLecture 4: Load Factor And Cost Of Power- line 2535

LOAD FACTOR AND COST OF POWER 59

#64General Lectures on Electrical EngineeringLecture 17: Arc Lighting- line 12259

Average energy of the discharge: 10,000 K. W. sec., or

#65Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1370

sq. cm. and a mean length of 240 cm. per turn. At a resistivity

#66Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1373

resistance, and what the power consumed at 450 kw. output?

#67Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1381

The resistance of 360 turns of 240 cm. length, 0.22 sq. cm.

#68Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1382

section and 1.8 X 10~6 resistivity, is

#69Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1384

360 X 240 X 1.8 X 10~6

#70Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1405

apart and 0.82 cm. diameter was found in paragraph 1, example

#71Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1500

C, as shown in Fig. 6, to B, E, constant voltage E exists between

#72Theoretical Elements of Electrical EngineeringTheory Section 4: Power and Effective Values- line 1543

rising on a parabolic curve from 0 to E2 during 40 per cent, of

Power, Energy, Work, And Efficiency

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