10TA Service Manual
TABLES & CHARTS
5/27/14
11-7
REFERENCE INFORMATION
CONVERSION FACTORS: English to Metric
To Convert From To Multiply by
Area ft
m
9.2903e-2
in
m
6.416 e-4
Energy BTU Joule (J) 1054.48
hp BTU/Hr 2546.2
kW hp 1.34
Length ft. m. 0.3048
in. m. 0.0254
Pressure lbf/ft
Paschals 47.88
lbf/in
(psi) Paschals 6894.76
in. Hg psi 0.491
in H
O psi 0.03612
Temperature
F
C
T
C
=5/9*(T
F
- 32)
C
F
T
F
=(9/5*T
C
) + 32
Volume ft
m
2.8317e-2
gal(U.S.) m
3.7854e-3
ft
gal(U.S.) 7.48
TABLE 11-8
CONSTANTS
Specific heat of Water
1 BTU/(lbm
F)
Specific heat of Air
4.19 kJ/(kg
C)
0.24 BTU/(lbm
F)
Tube-Ice Density 32-35 lbs/ft
Ice Latent Heat 144 BTU/hr
Water Sensible Heat
1 BTU/(lb
F)
Ice Melting Effect (IME)
1 Ton Refrigeration 12,000 BTU/hr
Atmospheric pressure 14.7 psia
Weight of Water 62.4 lbs/ft
8.33 lbs/gal
1 gpm water 12013 lb/day
Weight of air 0.0749 lbs/ft
0.0100 lbs/gal
1 Horsepower 2545.6 BTU/hr
1 Kilowatt 1.34 horsepower
Gravitational accel. 9.81 m
/sec
TABLE 11-9