CN101118947A - A prototype device for solar low-temperature thermal power generation and its manufacturing method - Google Patents

Abstract

The invention relates to a solar low-temperature heat utilization power generation prototype device and a manufacturing method for low-temperature power generation by utilizing the thermal energy of sunlight. At present, there is no related technology that utilizes the low temperature conversion of solar energy into electrical energy. A P-type lower plate electrode and an N-type lower plate electrode are arranged on the insulating plate material substrate of the present invention, and the p-type Bi ₂ Te ₃ thermoelectric material cylinder and the N-type Bi ₂ Te ₃ thermoelectric material cylinder are respectively connected to the P-type lower plate electrode and N-type lower plate electrodes. The upper plate electrode is arranged on the P-type converter and the N-type converter, and the vanadium-titanium ceramic heat-absorbing plate is arranged on the upper plate electrode. The invention combines the heat-absorbing material with the thermoelectric material, and uses the Bi ₂ Te ₃ thermoelectric material to convert the thermal energy within the range of the low-temperature heat utilization zone of the solar energy into electric energy, realizing the low-temperature power generation by utilizing the thermal energy of sunlight.

Description

A prototype device for solar low-temperature thermal power generation and its manufacturing method

technical field

The invention relates to a solar low-temperature heat utilization power generation prototype device and a manufacturing method for low-temperature power generation by utilizing the thermal energy of sunlight.

Background technique

With the issue of energy shortage becoming the focus of great attention, people are turning their attention to the utilization of renewable solar energy. There are two ways to convert solar energy into electricity, namely thermoelectric conversion and photoelectric conversion. The utilization of solar energy mainly includes low-temperature thermal utilization and solar photovoltaic utilization. The cost of photovoltaic technology of solar energy is relatively high, and it is generally used in solar cells and the like. The low-temperature heat utilization of solar energy is mainly used for heating and supplying hot water, such as solar water heaters. The use of thermoelectric materials to generate electricity is achieved by converting thermal energy into electrical energy through thermoelectric materials. Currently, generating electricity from thermoelectric materials requires very high temperature differences. Thermoelectric materials and devices are currently mainly used in the utilization of waste heat from power plants and automobile exhaust. If thermoelectric materials are combined with low-temperature utilization technology of solar energy to develop low-temperature solar power generation technology, it will greatly promote the utilization of solar energy.

Contents of the invention

The object of the present invention is to provide a prototype device and its manufacturing method for solar energy low-temperature heat utilization power generation. The prototype device can absorb solar radiation heat, increase the temperature of the high-temperature end of the thermoelectric device, and convert it into electrical energy through the thermoelectric device. The device is simple to manufacture and low in cost.

The solar low-temperature thermal power generation prototype device of the present invention includes a substrate, on which a P-type lower plate electrode and an N-type lower plate electrode are arranged, and the P-type converter and the N-type converter are respectively connected to the P-type lower plate electrode and the N-type lower plate on the electrode. The upper plate electrode is arranged on the P-type converter and the N-type converter. The P-type lower plate electrode, the P-type converter, the upper plate electrode, the N-type converter, and the N-type lower plate electrode are electrically connected to form a circuit with the external load. The heat absorbing plate is arranged on the upper plate electrode.

In the present invention, the heat-absorbing plate is a vanadium-titanium ceramic flat plate, the substrate is an insulating flat material, the P-type converter is a p-type Bi ₂ Te ₃ thermoelectric material cylinder, and the N-type converter is an N-type Bi ₂ Te ₃ thermoelectric material cylinder.

The following steps are used to fabricate the above device:

A) Welding a piece of metal on the vanadium-titanium ceramic plate as the upper plate electrode; welding two pieces of metal on the insulating material substrate as the P-type lower plate electrode and the N-type lower plate electrode;

B) The p-type Bi ₂ Te ₃ thermoelectric material cylinder and the N-type Bi ₂ Te ₃ thermoelectric material cylinder are sandwiched between the upper and lower plate electrodes, where the p-type Bi ₂ Te ₃ thermoelectric material cylinder corresponds to the P-type lower For the flat plate electrode, the N-type Bi ₂ Te ₃ thermoelectric material cylinder corresponds to the N-type lower flat plate electrode.

Bi ₂ Te ₃ thermoelectric materials have a high thermoelectric figure of merit in the range of 30-150°C, and the low-temperature heat utilization range of solar energy is 30-80°C, so Bi ₂ Te ₃ thermoelectric materials can cover the low-temperature heat utilization range of solar energy The heat energy inside is converted into electricity. The outstanding advantage of the present invention is that the combination of the heat-absorbing material and the thermoelectric material realizes low-temperature power generation by using the thermal energy of sunlight.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

As shown in FIG. 1 , the solar low-temperature thermal power generation prototype device includes an alumina substrate 5 on which two copper plates are arranged as a P-type lower plate electrode 6 and an N-type lower plate electrode 4 . The vanadium-titanium ceramic plate 1 is used as a heat absorbing plate, and a piece of copper plate is arranged below as an upper plate electrode 2 . The p-type Bi ₂ Te ₃ thermoelectric material column 7 and the N-type Bi ₂ Te ₃ thermoelectric material column 3 are respectively connected to the P-type lower plate electrode 6 and the N-type lower plate electrode 4 , and are connected to the upper plate electrode 2 . P-type lower plate electrode 6, p-type Bi ₂ Te ₃ thermoelectric material cylinder 7, upper plate electrode 2, N-type Bi ₂ Te ₃ thermoelectric material cylinder 3, N-type lower plate electrode 4 are electrically connected, and form a circuit with the external load .

The following steps are used to fabricate the above device:

1) Weld a piece of metal (copper) on the vanadium-titanium ceramic plate as the upper plate electrode; weld two pieces of metal (copper) on the insulating material substrate as the P-type lower plate electrode and the N-type lower plate electrode;

2) The p-type Bi ₂ Te ₃ thermoelectric material cylinder and the N-type Bi ₂ Te ₃ thermoelectric material cylinder are clamped between the upper and lower plate electrodes by welding, and the p-type Bi ₂ Te ₃ thermoelectric material cylinder corresponds to The P-type lower plate electrode, and the N-type Bi ₂ Te ₃ thermoelectric material cylinder correspond to the N-type lower plate electrode.

3) The n-type and p-type Bi ₂ Te ₃ regions on the alumina substrate are respectively drawn out by welding wires as two poles of the power supply, and a load is connected between the two poles to form a current loop.

Claims (2)

1. a solar energy low-temperature heat power generation antetype device comprises substrate, it is characterized in that substrate is provided with P type lower plate electrode and N type lower plate electrode, and P type conversion body and N type conversion body are connected on P type lower plate electrode and the N type lower plate electrode; The upper flat plate electrode is arranged on P type conversion body and the N type conversion body, and P type lower plate electrode, P type conversion body, upper flat plate electrode, N type conversion body, N type lower plate electrode conduct, and constitutes the loop with outer carrying; Absorber plate is arranged on the upper flat plate electrode; Described absorber plate is a vanadium titanium earthenware slab, and substrate is the insulation plate material, and P type conversion body is p type Bi ₂Te ₃Thermoelectric material cylinder, N type conversion body are N type Bi ₂Te ₃The thermoelectric material cylinder.

2. make the method for solar energy low-temperature heat power generation antetype device, it is characterized in that this method adopts the following step:

A) on vanadium titanium earthenware slab, weld a slice metal as the upper flat plate electrode; On insulation plate material substrate, weld two metals respectively as P type lower plate electrode and N type lower plate electrode;

B) with p type Bi ₂Te ₃Thermoelectric material cylinder and N type Bi ₂Te ₃Thermoelectric material cylinder double team between upper and lower plate electrode, p type Bi wherein ₂Te ₃The corresponding P type of thermoelectric material cylinder lower plate electrode, N type Bi ₂Te ₃The corresponding N type of thermoelectric material cylinder lower plate electrode.

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