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mars1129 [50]
3 years ago
10

A 600-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 56 percent. Determine the rate of hea

t transfer to the river water. Will the actual heat transfer rate be higher or lower than this value?
Engineering
1 answer:
Agata [3.3K]3 years ago
4 0

Answer:

471.43MW

Explanation:

the rate of heat transfer to the power plant is determined from the thermal efficiency equation

Qh = \frac{Wout}{nth}

Qh = 600 MW / 0.56

Qh =1071.43MW

The rate of heat transfer to the river is determined from the first law related to heat engine

QL = Qh - Wout

= 1071.43 - 600

= 471.43MW

the heat will be lost to the surrounding air as it passes through pipes and other surrounding components

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If the open circuit voltage of a circuit containing ideal sources and resistors is measured at 6 V, while the current through th
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Given Information:

Current of Ideal source = Is = 100 mA = 0.100 A

Open circuit voltage = Voc = 6 V

Short circuit current = Isc = 200 mA = 0.200 A

Required Information:

Power absorbed by idea current source = ?

Answer:

Power absorbed by idea current source = 0.3 Watts

Explanation:

Ideal Current Source:

An ideal current source doesn't have internal resistance and provides constant current regardless of the voltage supplied to the circuit.

The power absorbed by the ideal source can be found using

P = Is²R

Where Is is the ideal source current and R can be found using

R = Voc/Isc

Where Voc is the open circuit voltage and Isc is the short circuit current.

R = 6/0.200

R = 30 Ω

Therefore, the power absorbed by the ideal current source is

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P = (0.100)²*30

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You receive the bill for servicing your diesel engined car. As a good engineer you immediately notice that one of the items on b
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Answer:

b. spark plugs

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Illinois furniture , Inc produces all types of coffee furniture the executive secretary is a chair that has been designed using
o-na [289]

This question is incomplete, the complete question is;

Illinois furniture , Inc produces all types of office furniture. The "Executive Secretary" is a chair that has been designed using ergonomics to provide comfort during long work hours the chair sells for $130. There are 480 minutes available during the day and the average daily demand has been 50 chairs. There are eight tasks.

TASK     PERFORMANCE TIME( MIN )     TASK MUST FOLLOW TASK LISTED

A                            4                                                     ---------

B                            7                                                     ----------

C                            6                                                        A,B

D                            5                                                          C

E                            6                                                          D

F                            7                                                           E

G                            8                                                          E

H                            8                                                          F,G

1) What is the cycle time for operation?

2) What is the theoretical minimum number of workstation?

Answer:

1) the cycle time for operation is 9.6 min

2) the theoretical minimum number of workstation is 5

Explanation:

Given the data in the question;

production time per day = 480 minutes

average daily demand = 50

Given the data in the question;

1) cycle time for operation

this is simply referred to as the total time for the process from start to finish.

cycle time = production time per day / units demand per day

we substitute

cycle time = 480 min / 50

cycle time = 9.6 min

Therefore, the cycle time for operation is 9.6 min

2) theoretical minimum number of workstation.

theoretical minimum number of workstation = total task time / cycle time

Total task time = ( 4 + 7 + 6 + 5 + 6 + 7 + 8 + 6 ) = 49 min

∴  theoretical minimum number of workstation = 49 min / 9.6 min

theoretical minimum number of workstation = 5.104 ≈ 5

Therefore, the theoretical minimum number of workstation is 5

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Answer:

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MAOP Military Assistance Officer Program (US DoD)

Explanation:

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