![York YS Скачать руководство пользователя страница 56](http://html2.mh-extra.com/html/york/ys/ys_owners-manual_4772859056.webp)
Form 160.80-eG1 (708) Supersedes 160.80-eG1 (900)
Printed on recycled paper
© 2008 Johnson Controls, Inc. P.O. Box 423, Milwaukee, WI 53201 Printed in USA
www.johnsoncontrols.com
Metric Conversion Tables
MeASUReMeNT
MULTIpLY THIS
BY
TO OBTAIN THIS
eNGLISH VALUe
MeTRIC VALUe
CApACITY
TONS ReFRIGeRANT eFFeCT (ton)
3.516
KILOwATTS (kw)
pOweR
KILOwATTS (kw)
NO CHANGe
KILOwATTS (kw)
HORSepOweR (hp)
0.7457
KILOwATTS (kw)
FLOw RATe
GALLONS / MINUTe (gpm)
0.0631
LITeRS / SeCONDS (L/s)
LeNGTH
FeeT (ft)
304.8
MILLIMeTeRS (mm)
INCHeS (in)
25.4
MILLIMeTeRS (mm)
weIGHT
pOUNDS (lb)
0.4536
KILOGRAMS (kg)
VeLOCITY
FeeT / SeCOND (fps)
0.3048
MeTeRS / SeCOND (m/s)
pReSSURe DROp
FeeT OF wATeR (ft)
2.989
KILOpASCALS (k pa)
pOUNDS / SQ. INCH (psi)
6.895
KILOpASCALS (k pa)
Temperature
To convert degrees Fahrenheit (°F) to degrees Celsius (°C),
subtract 32° and multiply by 5/9 or 0.5556.
To convert a temperature range (i.e., 10°F or 12°F chilled
water range) from Fahrenheit to Celsius, multiply by 5/9
or 0.5556.
Efficiency
In the English I-P system, chiller efficiency is measured
in kw / ton:
kw / ton =
kw input
tons refrigerant effect
In the SI Metric system, chiller efficiency is measured in
Coefficient of Performance (COP).
COp =
kw refrigeration effect
kw input
kw / ton and COp are related as follows:
kw / ton =
3.516
COp
COp =
3.516
kw / ton
Integrated part Load Value (IpLV)
In the english I-p system, IpLV is calculated by the following
formula. A full explanation is shown on page 4:
1
IpLV* =
0.01 + 0.42 + 0.45 + 0.12
A
B
C
D
where: A = kw / ton at 100% Load @ 85°F eCFT
B = kw / ton at 75% Load @ 75°F eCFT
C = kw / ton at 50% Load @ 65°F eCFT
D = kw / ton at 25% Load @ 65°F eCFT
In SI Metric, the formula is:
IpLV* = 0.01A + 0.42B + 0.45C + 0.12D
where: A = COp at 100% Load @ 29.4°C eCFT
B = COp at 75% Load @ 23.9°C eCFT
C = COp at 50% Load @ 18.3°C eCFT
D = COp at 25% Load @ 18.3°C eCFT
* NOTe: The Non-Standard part-Load Value (NpLV) uses
the IpLV formula with the following exceptions: the eCFT
for part-load points varies linearly from the selected eFT to
65°F (18.3°C) from 100% to 50% loads, and fixed at 65°F
(18.3°C) for 50% to 0% loads.
FOULING FACTOR
eNGLISH I-p
eQUIVALeNT SI MeTRIC
(ft
2
°F hr/BTU)
(M
2
K/kw)
0.0001
0.018
0.00025
0.044
0.0005
0.088
0.00075
0.132