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3 years ago

Define extensive and intensive properties of thermodynamic system.

Engineering

2 answers:

Flura [38]3 years ago

7 0

Answer:

An intense property is a physical attribute of a system that is independent of the size of the system or the quantity of material it contains. An extensive property of a system, on the other hand, is dependent on the size of the system or the amount of material in it.

Explanation:

kow [346]3 years ago

3 0

Thermodynamic properties can be divided into two general classes, intensive and extensive properties. An intensive property is independent of the amount of mass. The value of an extensive property varies directly with the mass. Thus, if a quantity of matter in a given state is divided into two equal parts, each part will have the same value of intensive property as the original and half the value of the extensive property. Temperature, pressure, specific volume,and density are examples of intensive properties. Mass and total volume are examples of extensive properties.

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A treatment plant being designed for Cynusoidal City requires an equalization basin to even out flow and BOD variations. The ave

sineoko [7]

Answer:

The size of equalization basin is 6105.6 m³

Explanation:

The average flow is:

flow = ∑flow/n = 9.788/24 = 0.408 m³/s

Where n is the number or observations.

The inflow volume is:

$V_{inflow} =Q*t$

where t is the time interval

$V_{inflow} =0.446(1*3600)=1605m^{3}$

in the same way it is calculated the inflow volume for each observation

The outflow volume is:

$V_{out} =Q_{out} *t=0.4*(1*3600)=1400m^{3}$

The volume of flow is:

$ds=V_{inflow} -V_{out} =1605-1400=205m^{3}$

in the same way it is calculated the volume of flow for each observation. According to the file attach, the highest volume is 6105.6 m³

Download pdf

6 0

3 years ago

What is the thermal efficiency of this reheat cycle in terms of enthalpies?

schepotkina [342]

Answer:

$\eta =\dfrac{\left (h_3-h_4\right )+(h_5-h_6)-(h_2-h_1)}{(h_3-h_2)+(h_5-h_4)}$

Explanation:

For close gas turbine:

Gas turbine works on Brayton cycle.Gas turbine have lots of applications like ,it is use in aircraft,in land applications etc.

Reheating is the method to improve the efficiency of the gas turbine.In reheating gas is expanding in two turbine instead of one turbine alone.Two turbine like high pressure turbine and low pressure turbine are used for expansion.

In the above diagram 1-2 is a compressor,2-3 heat addition,3-4 high pressure turbine,4-5 reheating of cycle 5-6 low pressure turbine,6-1 heat rejection,

We know that $\eta =\frac{W_{net}}{Q_{s}}$

Now take $h_{1},h_{2},,h_{3},h_{4},h_{5},h_{6}$ represent the enthalpy of point 1,2,3,4,5,6 in the cycle respectively.

So total heat supplied $Q_S$ =

$\left (h_3-h_2\right )+\left (h_5-h_4\right )$

Net work out put

$W_{net}$ = $\left (h_5-h_6\right )-\left (h_2-h_1\right )$

So efficiency $\eta =\frac{W_{net}}{Q_{s}}$

$\eta =\dfrac{\left (h_3-h_4\right )+(h_5-h_6)-(h_2-h_1)}{(h_3-h_2)+(h_5-h_4)}$

5 0

4 years ago

Key length is designed to provide desired factor of safety<br> a. True<br> b. False

zhuklara [117]

Answer: true

Explanation:

A key is a machine element that us used to connect the element of a rotating machine to a shaft. It should be noted that the key hinders the relative rotation that may take place between the two parts.

Key length is designed to provide desired factor of safety. It should also be noted that the factor of safety shouldn't be much and the key length is typically limited to the hub length.

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3 years ago

Which option identifies the step represented in the following scenario?

Zolol [24]

Answer:

Solve the problem

Explanation:

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price of the tablet.

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3 years ago

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tatyana61 [14]

Answer:

Explanation:

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3 years ago