The company is a large user of electrical and steam energy. With the costs of fuel increasing significantly over the past 10 years, a concerted effort was necessary to reduce consumption and costs. The steam system on the plant had two generation locations with an 8 tonne/hr boiler and a 4 tonne/hr boiler, respectively.
During the fruit processing season both boilers would be operational. Out of season only the bigger boiler would be in operation with an average load of 2 tonne/hr. The fruit cannery operation was moved to the Tulbagh facility in 2013 resulting in a significant drop in steam requirement for half the year. Thus, the plant’s steam distribution infrastructure was significantly over capacity.
The site engineer attended the advanced steam training course and has utilised his learnings as well as the findings during the candidate plant assessment to implement efficiency measures on the boiler system.
During 2014/15, two projects were undertaken, resulting in a total energy saving of 928 000 kWh, valued at R135 750. With a total investment of R270 000, the estimated average payback period is two years. A reduction of 928 tonnes CO2 was achieved.