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Cases – Industry
Optimised production with a new dehumidifier
Lactosan produces cheese powder for the food industry. This happens through a drying process where the air from the outside is used. However, because the temperature and the humidity of the outside air varies through the seasons, Lactosan’s production has been very affected by the changing quality of air.
To accommodate this issue of changing quality of air, Lactosan has installed a new dehumidifying solution. This new dehumidifying solution has given Lactosan a higher and more stable production in addition to energy savings.
»The dehumidifier helps us standardise the quality of the air we use in the drying process. We now have a fully automatic process which ensures that the drying process is provided with a sufficient amount of air with a fixed temperature and humidity. In this way, we have eliminated a factor of uncertainty which has earlier affected our production in a wrong direction. With the new dehumidifier our production has increased and our energy usage for the same amount of production has dropped,« says Jan Nykjær Pedersen, Marine Engineer and Technical Manager, Lactosan.
The estimated profit was an energy saving of 10-15 percent. Furthermore, will Lactosan be able to maintain a higher and more stable production in the summer months with high humidity. This was made possible with the new dehumidifying solution which keeps the humidity at the desired level.
"The numbers showed a great potential to make use of the waste heat. The heat was used for a dehumidifying process which would maintain the desired level of humidity during the drying process. This solution will solve the issues with the changing humidity of the outside air and will additionally benefit the energy consumption.”
Higher production with less energy
A new drying process at Carletti has resulted in multiple gains: A shorter production time, higher productivity, and large energy savings. Consequently, the repayment period of investments was shortened to only two years.
In cooperation with Danish Energy Consulting, four larger energy savings projects have been implemented at the chocolate and candy manufacturer Carletti. The projects included: Installation of dehumidifier on process air, recovery of heat from air compressor, conversion of oil burner to LPG-burner on the steam boiler, and renewal of fluorescent light to LED light. The four projects will in total give an annual saving of around 6 million kWh.
Before making an agreement with Danish Energy Consulting, a screening to identify the saving potential will be conducted. This screening will include the number of kilowatt-hours you would be able to save and how large potential subsidies from an energy company would be.
»As a company this is a good model. You receive some numbers on both the saving potential, the necessary investments, and on the repayment period, before deciding. So far, the calculations have been proven correct, and some of the savings have even come to be greater than calculated beforehand,« says Factory Manager of Carletti. Kent Egsgaard, about Danish Energy Consulting’s concept ”no cure – no pay”.
»We have increased our capacity through the shortened drying process from 19 to 12 hours for a batch of 4,500 kg of chocolate chips. In other words, we spend a lot less energy per produced unit and we produce more products per unit of time,« says Kent Egsgaard.