Energy Audits and Renewable Energy Options for Welsh Dairy Farms

Strategic Insights -

Energy audits and investing in renewable energy have become crucial for Welsh dairy farms due to soaring energy prices. A recent series of Farming Connect on-farm events emphasized the importance of audits in identifying areas for energy savings. NFU Energy project engineer Jonathan Sandercock guided farmers on how audits work and where gains can be made. An energy audit involves a farm visit followed by a report offering solutions to capture energy savings. Modernizing energy-intensive systems, investing in renewables, and utilizing the energy produced at peak demand are potential solutions. However, audits are only financially sensible in systems with high energy consumption, typically costing £1,500 - £2,000.

Key Takeaways:

  • An energy audit can identify areas for energy savings in systems with high energy consumption, such as dairy farms.
  • The three biggest consumers of energy on a dairy farm are the water-heating and milk cooling systems and the vacuum pump.
  • Modulating pump speed with a variable speed controller can reduce energy use by up to 50%.
  • Heat recovery systems can redirect wasted heat to heat water, cutting the energy needed for washing by 40-50%.
  • Photovoltaic (PV) solar panels can reduce energy costs on a dairy farm by 30-50% and provide a five-to-seven-year payback period.
  • Renewable energy options, such as AD plants, can produce nutrient-rich digestate that can aid nutrient cycling and build soil organic matter.
  • Investing in renewable energy can reduce a farm's reliance on fossil fuels and contribute to a lower carbon footprint.

Statistics:

  • The cost of an energy audit ranges from £1,500 to £2,000.
  • A dairy farm with a high energy consumption of £40,000 per year can reduce its spend by £4,000 per year with a 10% energy saving.
  • Renewable energy options, such as solar panels, can provide a payback period of five-to-seven years.
  • Heat recovery systems can cut energy needed for washing by 40-50%.

Sources:

  • Jonathan Sandercock, NFU Energy project engineer
  • Dr Non Williams, Farming Connect's carbon specialist officer
  • Farming Connect on-farm events
  • NFU Energy
  • Renewable energy options, such as AD plants, have secondary benefits too.