Heat Transfer Simulation and Temperature Rapid Prediction for Trench Laying Cable

Table 3

Cable maximum temperature and electromagnetic loss with different computational grids (T_sur = 293.15 K, I = 800 A, and f = 50 Hz).

Cable model	Grid	Region	Maximum grid size (m)	Minimum grid size (m)	Total element number	Tmax (K)	Φloss (W)
Flat-type trench laying cable	Grid 1	Zone 1	0.0097	0.0024	10,881	336.520	190.65
		Zone 2	0.2971	0.0049
		Zone 3	0.3192	0.0199
		Zone 4	3.1044	0.2489
	Grid 2	Zone 1	0.0057	0.0017	18,070	333.742	183.38
		Zone 2	0.1137	0.0049
		Zone 3	0.1815	0.0181
		Zone 4	2.1844	0.1411
	Grid 3	Zone 1	0.0043	0.0015	27,610	333.708	182.55
		Zone 2	0.0938	0.0042
		Zone 3	0.1515	0.0117
		Zone 4	1.8306	0.1117
	Grid 4	Zone 1	0.0024	0.0013	50,188	333.541	182.25
		Zone 2	0.0682	0.0020
		Zone 3	0.1256	0.0117
		Zone 4	0.9978	0.0951
Trefoil-type trench laying cable	Grid 1	Zone 1	0.0060	0.0015	14,408	342.287	190.67
		Zone 2	0.1140	0.0013
		Zone 3	0.1815	0.0260
		Zone 4	2.5112	0.1411
	Grid 2	Zone 1	0.0059	0.0015	22,618	343.014	189.69
		Zone 2	0.0911	0.0012
		Zone 3	0.1457	0.0227
		Zone 4	1.7810	0.1088
	Grid 3	Zone 1	0.0047	0.0011	27,798	341.779	188.69
		Zone 2	0.0885	0.0012
		Zone 3	0.1173	0.0127
		Zone 4	0.9868	0.1031
	Grid 4	Zone 1	0.0033	0.0011	53,290	341.411	188.71
		Zone 2	0.0877	0.0011
		Zone 3	0.1093	0.0103
		Zone 4	0.4872	0.0748