Wind power direct drive coupling photovoltaic photo-thermal (PVT) heat supply system

Abstract

The invention discloses a wind power direct drive coupling photovoltaic photo-thermal (PVT) multi-energy heat supply system, which realizes efficient utilization of energy and stable heat supply through a vertical axis wind turbine to directly drive a compressor, a PVT assembly to synchronously generate electricity and collect heat, and double-water circulation independent heat exchange and energy storage linkage control. The system can be completely separated from an external power grid to operate, is suitable for remote areas or low-carbon buildings, and has remarkable economic and environmental benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive utilization of renewable energy, and specifically to a multi - energy heating system that combines a direct - drive compressor of a vertical - axis wind turbine, photovoltaic - thermal (PVT) component power generation and heat collection, and energy storage technology. It is applicable to scenarios such as building heating and industrial waste - heat recovery, achieving energy self - sufficiency. Background Art

[0002] Traditional heating systems rely on fossil energy or a single renewable energy source, suffering from problems such as high carbon emissions and low utilization efficiency of intermittent energy sources. In the prior art, solar thermal and photovoltaic systems often operate independently, with limited energy conversion efficiency; most wind - driven compressors need to be indirectly driven through electricity, resulting in large energy losses. In addition, existing systems lack multi - energy coordination and energy storage design, making it difficult to cope with unstable working conditions such as no wind and low light. The present invention solves the problems of efficient energy utilization and system stability by coupling a wind - direct - drive compression refrigeration cycle, PVT component photo - thermal - photovoltaic collaborative utilization, and an energy storage module. Summary of the Invention

[0003] Technical Solution This system includes the following core modules: 1. Photovoltaic - thermal (PVT) components: The upper layer is a photovoltaic panel that converts solar energy into electrical energy to drive the cooling water / condensate pump and energy storage; The lower layer is a solar thermal collector that heats low - temperature cooling water to form a high - temperature cooling water cycle.

[0004] 2. Wind - direct - drive compression refrigeration cycle: A vertical - axis wind turbine directly drives the compressor, avoiding secondary power conversion losses; The refrigerant flows through the compressor (high - temperature and high - pressure gas), condenser (releasing heat and liquefying), throttle valve (reducing pressure and vaporizing), and evaporator (absorbing heat and evaporating) in sequence to form a closed loop; In the evaporator, the high - temperature cooling water exchanges heat with the refrigerant, and after cooling, returns to the PVT component; in the condenser, the high - temperature refrigerant heats the condensate water for use at the user end.

[0005] 3. Double - water - cycle system: Cooling water circuit: Connects the PVT component and the evaporator, circulating independently; Condensate water circuit: Connects the condenser and the user end, circulating independently to avoid cross - contamination.

[0006] 4. Energy storage and energy management module: Photovoltaic electric energy is stored in the battery and used to drive the compressor (when the wind power is insufficient) and the pump; Real - time monitors the wind power and light intensity, and dynamically distributes the energy supply.

[0007] Multi - energy collaboration: Integrate wind energy (direct - drive compressor) and solar energy (solar thermal + photovoltaic) to improve energy utilization efficiency; Direct - drive design: The wind turbine is directly mechanically connected to the compressor, reducing the energy conversion link and increasing the efficiency by 15% - 20%; Energy storage linkage: The battery gives priority to powering the water pump, and the remaining electricity compensates for the compressor demand when the wind power is insufficient, ensuring the continuous operation of the system.

[0008] Achieve 100% self - sufficiency of energy for the heating system and reduce carbon emissions; Through the direct - drive and energy - storage design, the system can continuously operate for ≥48 hours under windless conditions; The comprehensive energy efficiency is increased by more than 30% compared with a single solar energy system. Brief Description of the Drawings

[0009] Figure 1 : Schematic diagram of the system flow; Specific Implementation Method

[0010] Example 1: Install a vertical - axis wind turbine (rated power 3kW) and a PVT module (photovoltaic efficiency 20%, solar - thermal efficiency 50%); Select R134a as the refrigerant, and add antifreeze to the cooling water and condensate water respectively; The capacity of the battery pack is 10kWh, which gives priority to powering the water pump, and the remaining electricity is used for the standby drive of the compressor; Under the conditions of 5 - hour average daily sunlight and a wind speed of 4m / s, the system can stably output hot water at 60°C for heating a 200 - square - meter building.

[0011] Example 2 (extreme working condition test): When it is continuously rainy for 3 days, the battery drives the compressor, and the heating temperature of the system is maintained at ≥45°C; When the wind speed suddenly increases to 8m / s, the speed of the compressor is adjusted by the frequency converter to avoid overload.

Claims

1. A multi-energy heating system with direct wind drive coupled with photovoltaic thermal energy, characterized in that: include: Photovoltaic thermal (PVT) modules for simultaneous power generation and cooling water heating; The compressor driven directly by the vertical axis wind turbine forms the core of the refrigerant cycle; Independent cooling water circuit and condensing water circuit; Energy storage module, dynamically coordinates the energy distribution of photovoltaic power generation and wind power drive.

2. The system according to claim 1, characterized in that The vertical axis wind turbine is directly mechanically connected to the compressor via a coupling, and no power conversion device is required.

3. The system according to claim 1, characterized in that The energy storage module includes a priority control circuit, which first supplies power to the water pump and stores or compensates for the compressor drive with surplus power.

Images