Photovoltaic carports and greenhouses are both applications that combine photovoltaic power generation technology with building structures. They not only meet the original functional requirements, but also generate clean energy and have the advantages of energy conservation and environmental protection.
Photovoltaic carport
1. Structural characteristics
Support system: usually made of steel structure, including supporting columns, inclined beams, purlins, etc., to ensure structural stability.
Photovoltaic modules: Installed on the top of the carport, commonly polycrystalline silicon or monocrystalline silicon photovoltaic modules.
Electrical system: including inverters, combiner boxes, lightning protection grounding systems, etc., to ensure power conversion and safe transmission.
Aesthetics: Fashionable and aesthetically pleasing design that harmonizes with the surrounding environment.
2. Functional features
Parking function: Provides parking space for vehicles.
Power generation function: convert solar energy into electrical energy through photovoltaic modules for self use or grid connected sales.
Energy conservation and environmental protection: reduce carbon emissions and lower energy consumption.
3. Parameters
Shed area: 100 square meters.
Photovoltaic modules: 50 pieces, each with a power of 310 watts.
Total installed capacity: 15.5 kilowatts (50 pieces x 310 watts).
Annual power generation: approximately 17697 kilowatt hours.
Project cost: approximately 186000 yuan.
Investment return period: approximately 6.2 years.
Service life: 25 years.
4. Actual cases
Case 1: Photovoltaic carport in a certain factory
Project Overview: The factory parking lot covers an area of 100 square meters and is equipped with 50 310 watt photovoltaic modules.
Design features: Steel structure support is adopted, and photovoltaic modules are vertically installed, which is beautiful and elegant.
Economic benefits: The annual power generation is about 17697 kilowatt hours, saving about 12000 yuan in electricity bills, and the investment payback period is about 6.2 years.
Photovoltaic greenhouse
1. Structural characteristics
Bracket system: usually made of light steel or plastic frame, suitable for agricultural planting needs.
Photovoltaic modules: installed on the top or part of the greenhouse, without affecting plant growth.
Transparency: Photovoltaic modules are made of transparent materials to ensure the light requirements of plants.
Electrical system: including inverters, combiner boxes, lightning protection grounding systems, etc., to ensure power conversion and safe transmission.
2. Functional features
Agricultural production: providing a greenhouse environment suitable for growing various crops.
Power generation function: convert solar energy into electrical energy through photovoltaic modules for self use or grid connected sales.
Energy conservation and environmental protection: reduce carbon emissions and lower energy consumption.
3. Parameters
Greenhouse area: 500 square meters.
Photovoltaic modules: 100 pieces, each with a power of 250 watts.
Total installed capacity: 25 kilowatts (100 pieces x 250 watts).
Annual power generation: approximately 28000 kilowatt hours.
Project cost: approximately 300000 yuan.
Investment return period: approximately 7 years.
Service life: 25 years.
4. Actual cases
Case 1: Photovoltaic greenhouse in a certain agricultural park
Project Overview: The agricultural park has a greenhouse area of 500 square meters and is equipped with 100 250 watt photovoltaic modules.
Design features: Adopting light steel structure, the photovoltaic modules are partially transparent and do not affect plant growth.
Economic benefits: The annual power generation is about 28000 kilowatt hours, saving about 20000 yuan in electricity bills, and the investment payback period is about 7 years.
Comparative Summary
Photovoltaic carport vs photovoltaic greenhouse
Application scenarios:
Photovoltaic carport: mainly used for vehicle parking, suitable for factories, residential areas, shopping malls and other places.
Photovoltaic greenhouse: mainly used for agricultural production, suitable for agricultural parks, farms and other places.
Structural features:
Photovoltaic carport: Made of steel structure, emphasizing aesthetics and stability.
Photovoltaic greenhouse: using light steel or plastic frame, emphasizing transparency and lightness.
Functional features:
Photovoltaic carport: provides dual functions of parking and power generation.
Photovoltaic greenhouse: provides dual functions of planting and power generation.
Economic performance:
Photovoltaic carport: with a short investment payback period and significant economic benefits.
Photovoltaic greenhouse: Taking into account both planting and power generation benefits, the economic benefits are relatively balanced.
How to design photovoltaic carports and greenhouses?
Photovoltaic carport design
1. Requirement analysis
Venue selection: Choose a flat, open, and sunny venue.
Usage requirements: Determine the size and shape of the carport to meet parking needs.
Electrical requirements: Determine the installed capacity of the photovoltaic system to meet the electricity demand.
2. Structural design
Bracket system:
Material selection: Commonly used materials include galvanized steel pipes, aluminum alloys, etc., to ensure corrosion resistance and high strength.
Structural form: Common structural forms include single span, multi span, etc. Choose the appropriate structure according to the site and requirements.
Basic design: Design a reasonable foundation and groundwork to ensure structural stability.
Photovoltaic modules:
Type selection: Common photovoltaic modules include polycrystalline silicon, monocrystalline silicon, thin film, etc. Choose the appropriate type based on efficiency and cost.
Installation method: Choose fixed inclined installation or flat installation, and choose the appropriate installation method based on lighting conditions and aesthetics.
Quantity calculation: Calculate the required number of components based on installed capacity and component power.
3. Electrical system design
Inverter: Choose the appropriate inverter to ensure its capacity matches the photovoltaic system.
Combiner box: Design a combiner box to collect the current from multiple photovoltaic modules into the inverter.
Cable wiring: Reasonably arrange cables to ensure the safety and efficiency of power transmission.
Lightning protection grounding: Design a lightning protection grounding system to ensure the safe operation of the system.
4. Analysis of Lighting Conditions
Light data: Collect local light data, including sunshine duration, solar radiation intensity, etc.
Shadow analysis: Use software to perform shadow analysis to ensure that photovoltaic modules are not obstructed.
5. Economic benefit evaluation
Investment cost: Calculate the total investment cost of the project, including material costs, construction costs, electrical equipment costs, etc.
Power generation forecast: Predict annual power generation based on lighting data and component parameters.
Economic benefits: Calculate the investment return period and internal rate of return of the project, and evaluate the economic benefits of the project.
6. Construction and acceptance
Construction plan: Develop a detailed construction plan to ensure project quality and progress.
Quality control: Conduct quality control during the construction process to ensure that all indicators meet the standards.
Acceptance testing: Conduct acceptance testing after the project is completed to ensure the normal operation of the system.
Photovoltaic greenhouse design
1. Requirement analysis
Venue selection: Choose a flat, open, and sunny venue.
Planting requirements: Determine the size and shape of the greenhouse to meet the planting needs.
Electrical requirements: Determine the installed capacity of the photovoltaic system to meet the electricity demand.
2. Structural design
Bracket system:
Material selection: Common materials include light steel, plastic, etc., ensuring corrosion resistance and lightweight.
Structural form: Common structural forms include arches, flat tops, etc. Choose the appropriate structure according to planting needs.
Basic design: Design a reasonable foundation and groundwork to ensure structural stability.
Photovoltaic modules:
Type selection: Choose transparent photovoltaic modules, such as semi transparent monocrystalline silicon or thin film modules, to ensure the lighting needs of plants.
Installation method: Choose fixed inclined installation or flat installation, and choose the appropriate installation method based on lighting conditions and aesthetics.
Quantity calculation: Calculate the required number of components based on installed capacity and component power.
3. Electrical system design
Inverter: Choose the appropriate inverter to ensure its capacity matches the photovoltaic system.
Combiner box: Design a combiner box to collect the current from multiple photovoltaic modules into the inverter.
Cable wiring: Reasonably arrange cables to ensure the safety and efficiency of power transmission.
Lightning protection grounding: Design a lightning protection grounding system to ensure the safe operation of the system.
4. Analysis of Lighting Conditions
Light data: Collect local light data, including sunshine duration, solar radiation intensity, etc.
Shadow analysis: Use software to perform shadow analysis to ensure that photovoltaic modules are not obstructed.
Transmittance: Choose the appropriate transmittance to ensure that the plant receives sufficient light.
5. Agricultural environmental design
Temperature control: Design a reasonable ventilation system and shading facilities to ensure a suitable temperature inside the greenhouse.
Humidity control: Design a reasonable irrigation and drainage system to ensure appropriate humidity inside the greenhouse.
Carbon dioxide supplementation: Design a carbon dioxide supplementation system as needed to promote plant growth.
6. Economic benefit evaluation
Investment cost: Calculate the total investment cost of the project, including material costs, construction costs, electrical equipment costs, etc.
Power generation forecast: Predict annual power generation based on lighting data and component parameters.
Economic benefits: Calculate the investment return period and internal rate of return of the project, and evaluate the economic benefits of the project.
7. Construction and acceptance
Construction plan: Develop a detailed construction plan to ensure project quality and progress.
Quality control: Conduct quality control during the construction process to ensure that all indicators meet the standards.
Acceptance testing: Conduct acceptance testing after the project is completed to ensure the normal operation of the system.