Download - 1D-a01 大型冷凍機 - CSJ
Re-examination of refrigeration power of the LHD cryogenic system and the 19th operation in 2017
MITO Toshiyuki, IWAMOTO Akifumi, HAMAGUCHI Shinji, MORIUCHI Sadatomo, OOBA Kouki, TAKAMI Shigeyuki, NOGUCHI Hiroki, TAKAHATA Kazuya, YANAGI Nagato, IMAGAWA Shinsaku NIFS ; KUMAKI Takuya, OBARA Kouji,
NOBUTOKI Minoru (Taiyo Nippon Sanso Corporation) E-mail: [email protected]
LHD
80 K 5.76 kW at 4.4 K20.6 kW at 80 K 650 L/h
1
Fig. 1. Layout of LHD superconducting and cryogenic system
Fig. 2. Equipment layout in the LHD He refrigeration room
Fig. 3. Operation history of the LHD cryogenic system
1. T. Mito, “Long-term operational performance of the LHD cryogenic system,” 2015 TEION KOGAKU J. Cryo. Super. Soc. Jpn. Vol. 50, No. 12, pp. 565-5
0
1,000
2,000
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4,000
5,000
6,000
7,000
1/19
97-8
2/19
983/
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4/20
005/
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6/20
027/
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8/20
049/
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016-
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Stop time (h)Purification / Cool-down/ Warm-up (h)Steady state operation time (h)
Oper
ation
time (
h)
LHD cryostat / superconducting coils
He refrigerator
Superconducting Bus-lines
Power supplies
He compressors
He gas storage tanks
Cold box A
p gCold box B
LN2 storage tank
Fire accident
Position of outer cylinder during maintenance
LHe Dewar 20,000 L ,
He purifier /
Table 1. Comparison of measured refrigeration power
Refrigeration power Measurement on August 5, 2016
Measurement on June 17, 1995
4.4 K refrigeration power (Measured by heater input
in LHe Dewar) 5.67 kW 5.67 kW
4.4 K liquefaction ability (Measured by He level sensor in LHe Dewar)
606 L/h 704 L/h
80 K refrigeration power (Measured by heater input
of LTIC2023) 23.35 kW 20.7 kW
4.4 k equivalent refrigeration power 9.19 kW 9.38 kW
―59― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a01
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3.00
3.10
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Time [hour]
Tem
pera
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[K]
Mas
s flo
w ra
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/s]
―60― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a02
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―61― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a03
Compressor
He bu er tank
Turbine
HX1
HX2
HX3
Cold box
ADS
Safety box
LN2 tank
OS-5
LP line 0.2MPa
1.6MPa
H2 pump
Moderators
ADS: Adsorber HX: Heat exchanger
Oilseparators
―62― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a04
―63― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a05
―64― 第95回 2017年度秋季低温工学・超電導学会
大型冷凍機1D-a06
(,
(
Fig. 1 Cooling power vs heat capacity of regenerator materials in second regenerator column.
―65― 第95回 2017年度秋季低温工学・超電導学会
小型冷凍機1D-a07
―66― 第95回 2017年度秋季低温工学・超電導学会
小型冷凍機1D-a08
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a-axis//Hb-axis//Hc-axis//H
Magnetization
[B/G
d]
Heff [T]
5K
GdTiO3
-14
-12
-10
-8
-6
-4
-2
00 10 20 30 40 50 60 70
5T3T1T
dS [J
/kg
K]
Temperature [K]
GdTiO3
―67― 第95回 2017年度秋季低温工学・超電導学会
小型冷凍機1D-a09
( )
MIYAZAKI Yoshiki, IKEDA Kazuya, WAKI Koichiro (RTRI) E-mail: [email protected]
kW
AMR(Active magnetic regenerator)
60%[1, 2]
[3]
Fig. 1 5 W
(Gd) 23 AMR
11 mm 60 mm (AMR 26 g)100 ~ 150 min-1
5 W/ 26 g = 192 W/kg ( 30 K)
Fig. 2 kW (7.2 kg) kW
30 KkW
2
Fig. 3 25 kW350 kg [4]
Gd 2
MnFe LaFeSi 1
kW
21
290 kg
Fig. 1 Temperature span as a function of the number of
rotation.
Fig. 2 Improvement of the cooling capacity with the
high-speed cycle.
Fig. 3 Weight of air-conditioning facility using magnetic heat
pump
[1] Y. Miyazaki, et al.: Abstracts of CSJ Conference, Vol. 91
(2015) p. 193. [2] Y. Miyazaki, et al.: Abstracts of CSJ Conference, Vol. 92
(2015) p. 238. [3] Y. Miyazaki, et al.: Abstracts of CSJ Conference, Vol. 94
(2017) p. 51. [4] S. Shimada, et al.: Railway Cybernetics Symposium, Vol.
39, No. 1 (2002) pp. 523, 1-4.
Tem
pera
ture
spa
n [K
]
Number of rotation [min-1]
3 layered AMR at 100 min-1
(Calculation)
2 layered AMR at 30 min-1
(2014 prototype)
Coo
ling
capa
city
[W]
Temperature span [K]
Wei
ght [
kg]
Compressor Magnetic Heat pumpWith 2nd order material
Magnetic Heat pumpWith 1st order material
Heat exchanger
Fan
Frame / cover
Electric accessory
Others
―68― 第95回 2017年度秋季低温工学・超電導学会
小型冷凍機1D-a10
0 100 2000
1000
2000
3000
4000SUS pipe6.0-200mmP = 400 kPa TB= 21 K
Tsub= 5 K
Flow Velocity 1.38 m/s 2.23 m/s 2.27 m/s 3.75 m/s
Tsat [ K ]
h [
W/(m
2 K)]
0 100 2000
1000
2000
3000
4000SUS pipe6.0-200mmP = 700 kPa TB= 21 K
Tsub= 8 K
Flow Velocity 1.19 m/s 1.36 m/s 2.11 m/s
Tsat [ K ]
h [
W/(m
2 K)]
0 100 2000
1000
2000
3000
4000
5000SUS pipe6.0-200mmP = 1100 kPa TB= 21 K
Tsub= 11 K
Flow Velocity 0.71 m/s 0.90 m/s 2.36 m/s 4.29 m/s
Tsat [ K ]
h [
W/(m
2 K)]
0 1 2 3 4 50
1000
2000
3000Heat Transfer Coefficient at
Tsat = 150 K
h [
W/(m
2 K)]
Flow Velocity [m/s]
400 kPa 700 kPa 1100 kPa
―69― 第95回 2017年度秋季低温工学・超電導学会
熱伝達1D-p01
―70― 第95回 2017年度秋季低温工学・超電導学会
熱伝達1D-p02
1. S. Takada, M. Murakami, et al.: Cryogenics, 49-10 (2009), pp. 576.
2. M.Nozawa, et al.: Cryogenics, 49-10 (2009), pp. 583. 3. M .Murakami, et al.: Adv. Cryo. Engineering, 61A
(2016) pp. 596.
(B) 25289300
Fig. 1 Planar heater and visualization for PIV application.
Fig. 2 Transient record of radial velocity. T=2.1 K, 4.44×E4 W/m2.
Fig. 3 Variation of radial velocity with r. =0° and -52° for T=1.8 K, =0° and -42° for 1.9 K, 4.44×E4 W/m2. a) Variation of time-averaged radial velocity, b) Logarithmic plot of RMS of fluctuating velocity.
―71― 第95回 2017年度秋季低温工学・超電導学会
熱伝達1D-p03
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Temperature (K)Temperature (K)
―72― 第95回 2017年度秋季低温工学・超電導学会
極低温流体計測1D-p04
―73― 第95回 2017年度秋季低温工学・超電導学会
極低温流体計測1D-p05
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CB2B1
A1 A2
―74― 第95回 2017年度秋季低温工学・超電導学会
極低温流体計測1D-p06
Fig.1 Characteristics of Kulite pressure sensor.
Fig. 2 Characteristics of Kyowa pressure sensor.
JST (ALCA)
0 500 1000-3
-2
-1
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Out
putV
olta
ge[m
V]
Pressure[kPa]
y=5.154*10-3*x
KYOWA PHL-A-B-2MPB
at 21 K2.5 mV
0 500 10000
20
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60
80
21K~25K 26K~27K 29K
Pres
sure
Gau
ge V
olta
ge (m
V)
Pressure (kPa)
KULITE CCQ-093
y=0.06*x+2.6
y=0.059*x
―75― 第95回 2017年度秋季低温工学・超電導学会
極低温流体計測1D-p07