Development and Application of a New High-Efficiency Sparse Linear System Solver in the Thermal-Hydraulic System Analysis Code

Table 1

The comparisons of the two matrix solvers for cases 1 and 2.

Case number	1	2
Description	Simple parallel pipes	Small modular power plant
Order	14	424
Nonzero number	40	1317
Original matrix solver’s fill-ins	48	1635
NRLU solver’s fill-ins	18	642
Original matrix solver’s matrix calculation time (s)	6	18
NRLU solver’s matrix calculation time (s)	4	10
Speed ratio	1.5	1.8