York YCAS0130 Technical Data, Glycol Correction Factors, Flow Rate And Pressure Drop Charts, 0200

Technical Data

FORM 201.19-NM1 (204)

TECHNICAL DATA

FLOW RATE AND PRESSURE DROP CHARTS

EVAPORATOR WATER PRESSURE DROP

(ENGLISH UNITS)

YCAS0130 - 0230

EVAPORATOR WATER PRESSURE DROP (SI UNITS)

YCAS0130 - 0230

100.00

Ft H2O
Drop,Press	10.00

D

C

B

A

1000.00

Drop, kPA	100.00
			D
Press		C
	10.00
		B
	1.00	A

1.00
100		500		1000
	Flow, GPM			LD09230A
MODEL NUMBER YCAS			EVAPORATOR
0130, 0140				A
0150, 0160, 0170, 0180,				B
0200, 0210,				C
0230				D

Pressure Conversion : Ft H20 = 2.3 x PSI

10.00	50.00	100.00
Flow, L/S		LD04482A
MODEL NUMBER YCAS	EVAPORATOR
0130, 0140	A
0150, 0160, 0170, 0180,	B
0200, 0210,	C
0230	D

FIG. 15 – FLOW RATE AND PRESSURE DROP CHARTS

GLYCOL CORRECTION FACTORS

The evaporator is designed in accordance with ARI-590- 92 which allows for an increase in pressure drop of up to 15% above the design value given above. Debris in the water may also cause additional pressure drop.

When using glycol solutions, pressure drops are higher than with water (see correction factors to be applied when using glycol solutions).

A = Correction Factor

B = Mean Temperature through Evaporator (°C) C = Concentration W/W (%)

Excessive flow, above the max GPM, will damage the evaporator.

GLYCOL CORRECTION EXAMPLE: (With YCAS0140)

•RWT = 36°F LWT = 28°F

•Average Water Temperature = 32°F (= 0°C)

•For 30% Propylene Glycol: From Graph, Find Correction Factor =

1.3@ 0°C and 30%

•Actual Measured ∆P = 12' H20

•Corrected ∆P = 12'/1.3 = 9.2' H20

•From Flow Rate and Pressure Drop Chart, locate flow @ 9.2' ≈ 300 GPM

48

ETHYLENE GLYCOL

	1.45
	1.40
	1.35
	1.30
A	1.25									50%
	1.20									40%
	1.15									C
										30%
	1.10									20%
	1.05									10%
	-10	-8	-6	-4	-2	0	2	4	6	8
					°C	B
	1.8			PROPYLENE GLYCOL
	1.7
	1.6
	1.5
A	1.4									50%
	1.3									40%
	1.2									C
										30%
	1.1									20%
										10%
	1.0
	-10	-8	-6	-4	-2	0	2	4	6	8
					°C	B			LD03504

FIG. 16 – GLYCOL CORRECTION FACTORS

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