Table 3 Estimated heat loads on the HTS magnets system and corresponding optimization strategies.

From: An on-board 2G HTS magnets system with cooling-power-free and persistent-current operation for ultrahigh speed superconducting maglevs

Thermal load (W)

Current leads and cryocooler undetached

Current leads and cryocooler detached

Before opt.

After opt.

Opt. strategy

Radiative heat

5.24

2.62

Radiation screens

2.62

Residual air

0.44

0.44

N/A

0.44

Current leads

39.94

7.96

LN2 thermal anchor

0

Access tubes

4.50

3.40

Bellows

3.40

Epoxy resin G10 bars

10.27

4.43

Hollow structure

4.43

Cryocooler (cold head)

8.00

8.00

N/A

0

HTS magnets

2.16

2.16

N/A

0

PCS

17.20

17.20

N/A

0

TOTAL

87.75

46.21

 

10.89