TEC Undervolting

From TPU Reference

(This page has been reproduced from here with the full permission of myself, the original author. I have taken the liberty to edit this reproduction for factual, visual, and grammatical accuracy and invite others to do the same. --XooM 23:45, 23 December 2006 (EST))

Since peltier cooling power is nonlinear, calculating cooling power at voltages other than VMax can be difficult. To make life easy, I've assembled a chart of cooling powers for some standard TECs using ohm's law, though I am unsure as to whether or not this is the correct method. First, I derive the resistance from the manufacturer-provided numbers. then, using these, i make I x and get the wattages for each amp. Here is the exact setup used, as appears on my TI-83: \y1=(((x/16.1*8.0))^2)*(80/(8.0^2))

thats how it would look for the 80watt TEC listed below.

Keep in mind, these numbers are "rough guidelines" at best! Don't follow them too closely. This has not been factually verified in any manner beyond the original calculating and research! I would like to be able to verify some or any of this myself, or at least get third-party verification, but have been unable to do so since its original write in July of 2005.

1 TEC Charts
2 Sources and References

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TEC Charts

[edit]

80 watt / 16.1 VMax / 8.0 IMax

Volts	Watts	amps
5	5.7	2.48
6	8.9	2.98
7	12.8	3.47
8	17.4	3.97
9	22.8	4.47
10	28.8	4.96
11	35.6	5.46
12	43.0	5.96
13	51.2	6.45
14	60.1	6.95
15	69.7	7.45
16	80	7.95

[edit]

120 watts / 24.6 VMax / 7.9 IMax

Volts	Watts	amps
5	3.5	1.60
6	5.5	1.92
7	8.0	2.24
8	10.8	2.56
9	14.1	2.89
10	17.9	3.21
11	22.1	3.53
12	26.7	3.85
13	31.0	4.17
14	36.4	4.49
15	42.2	4.81
16	48.5	5.13
17	55.2	5.45
18	62.3	5.78
19	69.8	6.1
20	77.8	6.42
21	86.2	6.74
22	95.0	7.06
23	104.3	7.38
24	114.0	7.70

[edit]

169 watt / 16.4 VMax / 16.1 IMax

Volts	Watts	amps
5	15.7	4.90
6	22.6	5.89
7	30.8	6.87
8	40.2	7.85
9	50.9	8.83
10	62.8	9.81
11	76.0	10.79
12	90.5	11.78
13	106.2	12.76
14	123.2	13.74
15	141.4	14.72
16	160.9	15.70

[edit]

172 watt / 24.6 VMax / 11.3 IMax

Volts	Watts	amps
5	7.1	2.3
6	10.2	2.8
7	13.9	3.2
8	18.2	3.7
9	23.0	4.1
10	28.4	4.6
11	34.4	5.1
12	40.9	5.5
13	48.0	6.0
14	55.7	6.4
15	64.0	6.9
16	72.8	7.3
17	82.1	7.8
18	92.1	8.3
19	102.6	8.7
20	113.7	9.2
21	125.3	9.6
22	137.6	10.1
23	150.4	10.6
24	163.7	11.0

[edit]

226 watt / 15.2 VMax / 24 IMax

Volts	Watts	amps
5	24.5	7.89
6	35.2	9.47
7	47.9	11.05
8	62.6	12.63
9	79.2	14.21
10	97.8	15.78
11	118.4	17.36
12	140.9	18.94
13	165.3	20.52
14	191.7	22.10
15	220.1	23.68

[edit]

320 watt / 14 VMax / 26 IMax

Volts	Watts	amps
5	40.8	9.3
6	58.7	11.1
7	80	13
8	104.5	14.9
9	132.2	16.7
10	163.3	18.6
11	197.6	20.4
12	235.1	22.3
13	275.9	24.1
14	320	26

This next Peltier has two charts, because I found two sources of conflicting information. Personally, I feel that this first one is more likely to be accurate.

[edit]

437 watt / 26.7 VMax / 32.8 IMax

Volts	Watts	amps
5	15.3	6.14
6	22.1	7.37
7	30.0	8.59
8	39.2	9.82
9	49.7	11.05
10	61.3	12.28
11	74.2	13.51
12	88.3	14.74
13	103.6	15.97
14	120.2	17.19
15	137.9	18.42
16	156.9	19.65
17	177.2	20.88
18	198.6	22.11
19	221.3	23.34
20	245.2	24.56
21	270.3	25.79
22	296.7	27.02
23	324.3	28.25
24	353.1	29.48
25	383.1	30.71
26	414.4	31.94

[edit]

437 watt / 24 VMax / 25 IMax

Volts	Watts	amps
5	19.0	5.2
6	27.3	6.2
7	37.2	7.3
8	48.6	8.3
9	61.5	9.4
10	75.9	10.4
11	91.8	11.5
12	109.3	12.5
13	128.2	13.5
14	148.7	14.6
15	170.7	15.6
16	194.2	16.7
17	219.3	17.7
18	245.8	18.8
19	273.9	19.8
20	303.5	20.8
21	334.6	21.9
22	367.2	22.9
23	401.3	24.0
24	437	25