Liquid can lose heat and subcool in the receiver, filter drier, and liquid line before it gets to the metering device. However, if there is any refrigerant vapor in the receiver, the subcooled liquid will not subcool further. The vapor will recondense to a liquid in the receiver. Both the liquid and the vapor will reach a new saturation

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:

Figure 2: Examples of q-line slopes The q-line (depicted in blue in Figure 1) starts at the x = y line and intersects the starting point of the rectifying section operating line. The parameter q is the mole fraction of liquid in the feed, and the slope of the q-line is q / (q - 1).

Subtract the actual liquid line temperature from the condensing temperature. The answer is the degrees of subcooling the system has. Systems that have no receiver, or any special devices to increase subcooling, should have about 10°F subcooled liquid refrigerant. Systems that use regular receivers will have little or no subcooling.

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

At x=0.5 another small line is drawn that represents the feed or `q' line. subcooled liquid the slope of the feed line is even positive, the same for a 

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

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Distillation Column ‼️q-Line‼️ The Feed Line (q-line) The parameter q is the mole fraction of liquid in the feed and the slope of the q-line is q / (q.

The q-values. If the condition of the feed is known to be either saturated liquid or saturated vapour, then the value of q is either 1 or 0.

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6) Subcooled Reflux. 7) Multiple Feeds Rectifying Section: Operating line. Slope=L/V=R/(R+1)<1 q-line reflux and all the exiting liquid as boilup.

is sub-cooled liquid. The feed-line or q-line equation, which is the locus of the intersection of the enriching and stripping operating-line equations, can be derived as follow: yn+1 V = xnL + xDD (4.4-16) ym+1 V = x m L− xBB (4.4-17) At the intersection of the two operating lines y = y

Boiling a liquid with Xa of 0.2 produces a vapour with Ya of 0.57 Subcooled liquid q > 1 q line /; Bubble point liquid q = 1 q line |; Partially 

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" of feed equation is positive.

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.

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.

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Note that qcan be less than zero (superheated 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 q-line is performed in Excel as follows: 1. The rectifying-section operating line is drawn using Eqs. 1 and 2 and the specifi ed values of x D and R.

Feed quality q: q < 0 is superheated vapor; q = 0 is dew point vapor; 0 < q < 1 is a liquid vapor mixture; q = 1 is bubble point liquid; q > 1 is a subcooled 

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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 q-line (depicted in blue in Figure 1) starts at the x = y line and intersects the starting point of the rectifying section operating line. The parameter q is the mole fraction of liquid in the feed,

For sub-cooled liquid, q > 1 and the slope of the feed line is positive but less than infinity. For super-heated vapor, q < 0 and the slope of the feed line is 

subcooled liquid feed on the distillation column performance. All q-lines are parallel and meet the y = x line at the corresponding value of xF, 

The term subcooling refers to a liquid existing at a temperature below its normal boiling point. For example, water normally boils at 100°C (at atmospheric pressure); at room temperature 20°C the water is termed "subcooled". Analogically the subcooling is defined also in nuclear engineering but for another purpose.

Jul 20,  · Here, we walkthrough solving a subcooled liquid problem. Given a liquid at a certain temperature and pressure, this is how you determine how far it is below

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"

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 

Subcooling. The term subcooling (also called undercooling) refers to a liquid existing at a temperature below its normal boiling point. For example, water boils at 373 K; at room temperature (293 K) the water is termed "subcooled". A subcooled liquid is the convenient state in which, say, refrigerants may undergo the remaining stages of a

Mar 30,  · Organized by textbook: https://learncheme.com/Shows how to use mass balances to draw a q-line on a y-x phase diagram for a n-hexane/n-octane mixture. The q-l