Feed condition Value of q Subcooled liquid >1 • q: ratio of the increase in molar reflux rate across the feed > 1 Bubble-point liquid 1 Partially vaporized L F /F reflux rate across the feed stage to the molar feed rate L L V V Dew-point vapor 0 Superheated vapor < 0 F q F V V q 1

Subcooled flow boiling has various applications in industrial processes, which includes the regasification of liquefied natural gas at the gas terminal. As subcooled liquid enters the inlet, it is heated up by a constant heat flux applied to the wall surface. The model consists of an inlet region, a heating region, and an outlet region

DETAILS OF q-LINE : ; 0-1, -ve inclined between saturated liquid and saturated vapor line, Feed is a mixture of saturated vapor and saturated liquid ; >1, +ve 

of the column, that is in rectifying section we have one liquid flow rate one the sub cooled liquid, this is q line for the saturated liquid this is for 

Draw the q-line for the following conditions: a) Feed is 30 mole % methanol and is a saturated liquid. b) Feed is 30 mole % methanol and is a two phase mixture that is 30% vapor . Subcooled liquid, q= (Ḹ - L)/F = ((F+F/5 +L)-L)

subcooled liquid Position B: q = 1.0 saturatedliquidsaturated liquid Position C: 0 < q <: 1 mixture of saturated vapor and liquid PositionD:Position D: q = 0 saturated vapor Position E: operating line after crossing the q-line, estimating the last stage if necessary.

There is no “ideal feed condition” for distillation tower design. · Let us check out the cases: · Sub Cooled Feed (q>1): · Well, a sub cooled feed at the feed tray 

A quality of 0 corresponds to a vapor feed ( ) at its dew point and a quality of 1 corresponds to a liquid feed ( ) at its bubble point; the 

How many degrees is the liquid subcooled in the condenser? Therefore, the liquid must be subcooled to at least 97 degrees to prevent liquid line flash gas. This means the system would need at least 8 degrees (105 degrees - 97 degrees) of condenser subcooling to prevent liquid line flashing before getting the metering device.

The y-intercept of the q-line for a subcooled liquid feed is negative O zero positive ; Question: The y-intercept of the q-line for a subcooled liquid feed is negative O zero positive . This problem

So, can we have a condition in which we have subcooled liquid from the receiver flowing into the liquid line? Subcooled liquid and receivers. This question is generally answered as follows: No, except for the minor amount of subcooling generated by static pressure due to the liquid level in the receiver. For example, R-404A liquid will generate

subcooled liquid. Position B: q = 1.0 saturated liquid saturated liquid. Position C: 0 < q <: 1 Saturated Vapor: Slope of the q line is zero.

If feed is a subcooled liquid, q>1 (i.e., L' augmented by vapor condensation), "slope" of feed equation is positive; If feed is a superheated vapor, q<0 (i.e., L' decreased evaporation), "slope"

If the feed is a mixture if liquid and vapor, "q" is the fraction that is liquid, i.e. q = 1-y, where y is molar fraction of vapor phase in the 

Step 6: Draw the line with slope 0.5 which is the rectifying section OL. Step 7. Draw the stripping section operating line from the Bottoms composition to the intersection of the rectifying section OL and the q-line. y drawing a x Solution: Step 1: From x D locate x 1 and y 1 horizontal line to the equilibrium condition for stage 1. Step 2

If the feed is a vapor— liquid mixture, q is a fraction. Values of q greater than 1 indicate subcooled liquid feed. Values of q less than 0 indicate superheated vapor feed. Now let us look at the intersection points (x„ y,) of the stripping and rectifying operating lines. Use of equations (2.28) and (2.30) gives:

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Slope of the q-line is: Answer (a) V/F denotes the vapor fraction, hence the liquid fraction is=(1-0.37)=0.63 Slope of q-line: Feed is 50% ethanol and is a subcooled liquid. One mole of vapor must be condensed to heat 12 moles of feed to their boiling point. f. Feed is 20% ethanol, and 70% is vaporized in a flash distillation system.

May 22,  · If the temperature of the liquid is lower than the saturation temperature for the existing pressure, it is called either a subcooled liquid or a compressed liquid. The term

Apr 15,  · The term Subcool refers to any temperature that is below the saturation condensing point of the refrigerant. Let’s say I have a saturation temperature of eighty degrees and the line temperature is at seventy-seven degrees. We now know that we have a three degree Subcool. The efficiency of your system depends on how much liquid refrigerant is

used for the distillation of subcooled liquid ( or superheated vapor) feed. There is also the q-1. (10). This is known as the equation of the feed line.

vapor) or greater than unity (subcooled liquid). The slope of the q-line is q/(q – 1). The construction of the two operating lines and the.

Plotting the q-line. (21.3) \begin{displaymath} F=L_F+V_F \end{displaymath}. (21.4) \begin{equation*} q=\frac{(\overline L -. For sub-cooled liquid, q > 1.

For example, when a subcooled liquid with mole fraction of A=0.4 (point A) is about the condition of the feed mixture, then we can construct the q-line 

The y-intercept of the q-line for a subcooled liquid feed is negative O zero positive ; Question: The y-intercept of the q-line for a subcooled liquid feed is negative O zero positive . This problem has been solved! See the answer See the answer See the

Oct 03,  · Adding the material balance (Q-line) to the y-x diagram