Photovoltaic and photo-thermal coupled thermoelectric generation system and method

A photothermal coupling and cogeneration technology, applied in the field of solar energy utilization, can solve the problems of reducing the power generation efficiency and service life of solar panels, wasting solar energy resources, etc., and achieve the effect of improving thermal efficiency and economy, and reducing heat collection area.

Inactive Publication Date: 2017-08-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive temperature will reduce the power generation efficiency and service life of the panel, and at the same time, the loss of heat also wastes solar energy resources

Method used

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  • Photovoltaic and photo-thermal coupled thermoelectric generation system and method
  • Photovoltaic and photo-thermal coupled thermoelectric generation system and method
  • Photovoltaic and photo-thermal coupled thermoelectric generation system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Photovoltaic photothermal coupled heat and power cogeneration system consists of three parts, such as figure 1 As shown, the first part: heat collection system; the second part: power generation system; the third part: heating system.

[0034] The heat collection system comprises two parts, a PVT assembly (1) and a CPC assembly (2).

[0035] The PVT assembly (1) is a PVT array composed of a plurality of PVT plates connected in series and in parallel to meet flow and heat load requirements. As a preheater of the organic Rankine cycle, the PVT module works in the low temperature region (below 60°C).

[0036] Described PVT plate is known structure, comprises (with reference to image 3 cross-sectional structure): tempered glass cover plate (1-1), photovoltaic cell film (1-2), metal substrate (1-3), heat exchange tube (1-4), thermal insulation material (1-5) and packaging Housing (1-6).

[0037] The CPC assembly is a CPC array composed of a plurality of CPC boards conne...

Embodiment 2

[0044] Photovoltaic photothermal coupled heat and power cogeneration system uses PVT modules as preheaters and CPC modules as evaporators for solar heat collection and utilization. The number and series-parallel connection of single boards in PVT components and CPC components are determined according to the heat capacity of the photovoltaic-thermal coupling cogeneration system, the flow rate of working fluid and the temperature and pressure parameters of the system, including but not limited to those in the present invention figure 2 Arrangement shown.

[0045] After the organic working fluid is pressurized by the working fluid pump (9), it absorbs the heat from the back plate of the battery board through the PVT module (1), and the temperature initially rises, but it is still in a supercooled liquid state; Absorbing solar heat to collect heat, the temperature rises and vaporizes into high-temperature and high-pressure steam; the working medium steam becomes low-pressure stea...

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Abstract

The invention belongs to the field of solar energy utilization, and particularly relates to a photovoltaic and photo-thermal coupled thermoelectric generation system and method. The system consists of a heat collection subsystem, a power generation subsystem and a heat supply subsystem which are connected in series, wherein the heat collection subsystem comprises a photovoltaic and photoelectric integrated assembly and a compound parabolic heat collector; the power generation subsystem consists of an expansion machine, a power generator, a heat exchanger, a condenser, a liquid storage tank and a working medium pump which are connected in series; and the heat supply subsystem consists of a heat exchanger and a heat consumer. According to the photovoltaic and photo-thermal coupled thermoelectric generation system disclosed by the invention, photovoltaic power generation and low temperature photo-thermal organic Rankine cycle power generation are combined, and a working medium is preheated through heat generated by photovoltaic power generation, so that the unit electrical work heat collection area is reduced, and power generation and heat supply are realized simultaneously. Therefore, photovoltaic and photo-thermal coupled thermoelectric generation system can fully make use of solar resources and realize 'parallel temperature and gradient utilization', and the heat efficiency and the economy of the whole system are improved.

Description

technical field [0001] The invention belongs to the field of solar energy utilization, and in particular relates to a system and method for coupling heat and power cogeneration with photovoltaic light and heat. Background technique [0002] Energy and environmental issues have accelerated the development of clean energy and renewable energy to replace traditional fossil energy power generation technologies. Solar power generation technology is valued for its huge energy storage capacity, safety and cleanliness. Solar power generation technologies mainly include photovoltaic power generation and photothermal power generation. Photovoltaic power generation is a power generation technology that uses the principle of photovoltaics to directly convert solar energy into electrical energy through solar panels; photothermal power generation is a power generation method that converts solar energy into heat energy through a heat collector, and the heating medium works in the form of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G6/06F22B1/00F24J2/00
CPCY02E10/46Y02P80/15F03G6/065F22B1/006F24S21/00
Inventor 苗政张凯
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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