19 Nov Ventilation and solar energy: an essential combination for the future of the pig sector
In modern pig farms, ventilation is a fundamental pillar for ensuring animal welfare , productivity , and health , but it also represents one of the largest energy demands within the entire livestock facility. Its function is to maintain optimal environmental conditions by regulating temperature, relative humidity, and gas concentration.
Therefore, an inefficient ventilation system directly impacts productivity: animals reduce their feed intake, growth slows, and health risks increase. In contrast, an effective ventilation system creates a stable environment even in adverse weather conditions.
The key to all of this is that for this system to function continuously and reliably, it needs a constant energy supply . This is where photovoltaic solar energy becomes an essential strategic ally for the sector.
How are ventilation and solar energy related?
Forced ventilation needs to operate continuously to maintain adequate temperature, humidity, and air quality in the buildings. The highest energy consumption occurs during the middle of the day, coinciding with peak solar radiation. If the farm has a photovoltaic system, solar energy generation aligns perfectly with the peak fan demand hours, allowing most of the energy consumption to be covered with clean, free energy.
During the hottest months, the heat load inside pig farms can exceed 30°C, especially in fattening or nursery farms. This forces fans to operate at full capacity for much of the day. In a medium-sized pig farm with 2,000 places, the ventilation system can consume between 70 and 100 kWh per day in summer. A 20-25 kWp solar installation can generate 90 to 120 kWh daily, covering all ventilation consumption during daylight hours.
Installing a photovoltaic solar system allows us to cover a significant portion of that demand. Since the period of greatest ventilation coincides with the times of maximum solar irradiance (between 10:00 and 18:00), the generation and consumption profile aligns almost perfectly.
The estimated energy savings in these facilities range from 20% to 50% of the farm’s annual electricity expenditure, depending on the size and consumption profile.
In larger and more isolated farms, three-phase systems with storage of any power are installed, which allow the entire electrical demand, including fans, feed motors, pumps and air conditioning equipment, to be supplied with renewable energy and batteries to ensure nighttime supply.
From an economic standpoint, a farm of this type can reduce its electricity bill by 40 to 60% annually thanks to direct solar self-consumption. Adding a battery storage system allows some of the energy generated during the day to be used for nighttime ventilation or other electrical needs, further optimizing the return on investment.
In summary, we could say that these are the advantages of photovoltaics for ventilation:
– Coincidence between production and demand, since the times of greatest need for ventilation (hot days, high insolation, etc.) coincide with the times of greatest solar production.
– Greater energy autonomy, less dependence on the electrical grid and security and continuity of service: with the use of backup batteries, voltage drops and occasional outages are avoided and nighttime consumption is covered.
– Sustainability: Direct reduction of CO₂ emissions, a more efficient model and an improved image for customers.
– Real-time monitoring of consumption and generation, facilitating management and preventive maintenance: the integration of energy monitoring and control allows for real-time observation of both solar production and the ventilation system’s consumption. This information facilitates preventive management and early detection of inefficiencies, contributing to thermal stability and animal welfare.
In short, installing photovoltaic solar energy on pig farms optimizes the ventilation system, improves sustainability, and strengthens the farm’s profitability, especially during periods of peak heat and electricity demand. Ventilation represents a continuous energy consumption, while solar energy is a constant and predictable source during the most critical hours of the day. Therefore, photovoltaics not only reduces costs but also improves energy security, the operational stability of the facilities, and ultimately, the profitability of the pig farm.
Isolated and direct self-consumption installations : two solutions depending on the farm
At Soma Genpower we install systems adapted to the size and needs of each farm, and depending on these needs we carry out different types of installations, isolated or for self-consumption.
Grid-connected self-consumption systems are ideal for farms with conventional electricity access. As we have already seen, photovoltaic energy covers daytime consumption and reduces the overall cost.
In the case of off -grid installations , they are perfect for remote farms, outbuildings, or farms without access to the grid or with an unreliable power supply. We support the photovoltaic system with batteries that ensure operation day and night.
At Electricidad Soma Gen Power, we are photovoltaic solar energy installers in Lleida, Huesca, Tarragona and the rest of Spain. As a specialized and experienced solar company, our technicians will study your case and make you a proposal tailored to your needs, fully complying with the legal and technical requirements of an installation.
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