Grey Green have audited six wineries in the Western Cape during the harvest period over the past few months with another two winery energy audits in progress and a further three in the pipeline.
On average, the energy saving opportunities identified at each site could potentially save the wineries approximately R 370 000 per annum with a promising average pay-back period of 3 years. We also calculated an average of 400 tonnes of equivalent carbon dioxide emissions saved through our recommendations.
Highlights of the proposed interventions included:
- Effluent Treatment Optimizations
- Feasibility Studies for Solar PV
- Waste-Heat Recovery System design
- Energy Efficient Extraction System design
- Efficient Lighting Retro-fit proposals
- Chiller System Optimizations including. insulation
Interestingly, chillers (cooling/refrigeration) accounted for approximately 40% of the total energy consumption, with the exception of those wineries with a distillery. The distillery accounted for 18% electrically and when converting the boiler fuel into equivalent kWh (using the calorific value of the fuel), the fuel accounted for 94% of the total energy consumption!