Systems

Question 1

Thermal efficiency

Answer 1

P useful power / Q supplied work

Question 2

m (oil)

Answer 2

Q supplied work/ LHV oil

Question 3

E pot?

Answer 3

m * g (erdbeschleunigung) * z(Höhe)

–> E ist in Joule

Question 4

E kin?

Answer 4

m * (v^2)/2

–> E ist in Joule

Question 5

What charging stations exist for BEV?

Answer 5

AC charging stations: charging unit to convert AC into DC is placed inside the car; car is connected to electricity grid via wallbox

DC charging station: charging unit is placed outside the car and converts AC to DC directly

Induction station: Car battery is charged wirelessly through an electromagnetic field

Question 6

What is mobility?

Answer 6

potential change of location of persons
depends on physical, virtual, spatial conditions and their subjective perception

Question 7

What is traffic?

Answer 7

physical change in space of goods, ppl, and data

Question 8

What is transport volume?

Answer 8

Determined by number and length of ways

Question 9

what is traffic behavior?

Answer 9

of routes, distance and duration

Question 10

By what are thermal engines limited?

Answer 10

by the amount of exergy = carnot efficiency
which is &laquo_space;100%

Question 11

1st law of thermodynamics in an open system?

Answer 11

E2 - E1 = Q12 + W12 + e delta m

Question 12

1st law of thermodynamics in a closed system

Answer 12

E2 - E1 = 0