A. Main Components
1) Thermoelectric Module (TEG)
A TEG module (model TEP 12641.5) is used in the system. The purpose of using this is to convert heat energy into electrical energy.
Fig. 5. Thermoelectric Module TEP 1264-1.5
It has the following features shown in the table below:
TABLE I
Specification of the TEG module (TEP1-1264-1.5)
Features Ratings
Hot Side Temperature (˚C) 300
Cold Side Temperature (˚C) 30
Open Circuit Voltage (˚C) 9.4
Matched Load Resistance (ohms) 2.8
Matched load output voltage (V) 4.7
Matched load output current (A) 1.56
Matched load output power (W) 7.3
Heat flow across the module(W) ≈ 152
Heat flow density(W cm-2) 9.5
AC Resistance(ohms) Measured under 27 ˚C at 1000Hz ~ 1.8
2) DC-DC Converter
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The MAX756 takes a positive input voltage to a minimum of 0.7V, and converts it to a higher pin –selectable output voltage of 3.3V or 5V. The MAX757 is an adjustable version that takes an input voltage down to 0.7V and generates a higher adjustable output voltage in the range from 2.7V to 5.5V. Both of the IC is used in the designed system: one to be turn on a fan in order to minimize the temperature of the cold side of the TEG module, and another to have the output USB port to charge up the mobile phone.
Along with the IC other components such as capacitors, inductors, potential meter, diode, resistors, led light, and output USB connector are used in order to make it function like a dc-dc voltage step up regulator.
B. Basic Components
1) Gas Burner
A gas burner is used as a heat source. A gas burner is chosen mainly because it will effectively charge the TEG module (TEP 12641.5) which requires a certain amount of heat to successfully develop a voltage. It can give a temperature of 270ºC hot side and 120ºC cold side.
2) Heat Sink
A heat sink is a passive heat exchanger that cools a device by dissipating heat into the surrounding medium. The hot side of the TEG module will be facing the heat. The cold side of the TEG module will be facing the heat sink in which the heat will be dispersed and there will be a fan on top which will help keep the cooling sides cool.
3) Aluminium
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