KAESER ESD.2C - Page 409

Helium unit
Measurement record
for helium screw compressor units
Compressor unit Type/Serial-No.: ESD 442 SFC 14,0 bar(a) HE a.c. /480V 60Hz / 1205 - Linde CH, Proj. Florence12, USA
Mat.No.: ESD.2C Equipment-No.: 4824071
Airend Type/Serial-No.: Sigma 38 Helium / 1014 EQ.-No. 788085
Motor Type/Serial-No.: Make: Siemens
Rated power [kW]: 250
Speed [min
-1
]:
Warranty terms
Suction temperature T
A
:
298 K
Suction pressure p
A
:
1,05 bar (abs) Rate of mass flow m: 31,1 g/s
Tol.:
+5 / -2 %
Unit outlet pressure p
e
:
14,0 bar (abs)
Power input P
IN
:
111,6 kW
Tol.:
+/- 3 %
Measurement results
Ambient pressure p
U
:
0,984 bar (abs)
Ambient temperature T
U
:
298 K
Suction temperature T
A
:
299,6 K
Discharge temp. T
(END)
:
327 K
Unit outlet temperature T
(OUT)
:
--- K
Gas meter inlet temperature T
B1
:
299,1 K
Gas meter outlet temp. T
B2
:
--- K
Suction pressure p
A
:
1,05 bar (abs)
Unit outlet pressure p
e
:
14,0 bar (abs)
Gas meter working pressure p
B
:
5,74 bar (abs)
Gas meter working volume V
B
:
10,0 m³
Duration of measurement t:
5,18 min
Compressor speed n
K
:
595
min
-1
Deviation
Package power input P
IN
:
108,2 kW
20 Hz
-3,05
%
Pressure ratio:
5,74
5,467
1,05
Free gas delivery (referring to inlet conditions ) [m³/min]
10,0 299,60
5,467
10,571
5,18 299,10
Density at inlet conditions [kg/m³]
273,15 1,05
0,1785
0,1687
299,60 1,013
Rate of mass flow [g/s]
10,571 0,1687
29,72
Remarks: Deviation
For T
A
=
298,0 K and res. ρA = 0,1696 mass flow will result in approx. m = 29,88 g/s
-3,93
%
Date: Name: M. Skrobek
1LG6318-4AA96-Z
30.08.13
V
A
=
t
=
V
B
T
B
T
A
Z
x x
=
x x
=x x
ρ
A
=
=
p
N
p
A
x x
ρ
N
T
A
T
N
=
x
m =
=
x
x
60
1000
V
A
ρ
A
x
60
1000
Z =
p
A
p
B
=
=