Performance Data

FINNED ELEMENT SINGLE / DOUBLE / QUADRUPLE		OUTPUT WATT / M	TUBE DIA mm	TRENCH WIDTH mm	TRENCH HEIGHT mm
35 mm x 75 mm	SINGLE	204	22	140	80
35 mm x 75 mm	DOUBLE	387	22	250	80
75 mm x 75 mm	SINGLE	520	22	150	150
75 mm x 75 mm	DOUBLE	970	22	250	150
75 mm x 75 mm	QUADRUPLE	1605	22	250	225
108 mm x 108 mm	SINGLE	655	22	225	200
108 mm x 108 mm	DOUBLE	1294	22	350	200
108 mm x 108 mm	QUADRUPLE	2193	22	350	300

Outputs in watts per metre of finned element are based on LTHW 80 °C M.W.T, 20 °C E.A.T and 1 metre/second water velocity. The above WIDTH and HEIGHT dimensions are a guide and can be altered to suit individual requirements. For higher heat outputs, multiple finned elements can be used in a deeper trench heater body, Please contact TRENCH HEATING LTD for advice.

THE CORRECTION FACTORS FROM THE TABLE BELOW MUST BE USED TO ESTABLISH THE ACTUAL OUTPUT IN WATTS/M.

WATER VELOCITY METRES/SECOND	CORRECTION FACTOR	MWT-EAT °C	CORRECTION FACTOR
0.08	0.90	35	0.47
0.10	0.91	40	0.57
0.15	0.92	45	0.67
0.25	0.93	50	0.77
0.28	0.94	55	0.88
0.30	0.95	56	0.90
0.35	0.96	57	0.93
0.50	0.97	58	0.95
0.75	0.99	59	0.98
1.00	1.00	60	1.00
1.35	1.02	65	1.12
2.00	1.03	70	1.24

Heating elements

Heating elements comprise of seamless copper tube to BS 2871 mechanically expanded into 0.5 mm aluminium fins.

The copper tube outside diameter is 22 mm after expansion.

The aluminium fins are available in various configurations to offer a range of heat outputs and trench sizes. (see heat output chart)

Finned elements are manufactured to customized lengths and tested to 10 bar in our factory.

Select Page

Close Navigation

Performance Data

Heating elements