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?????? Cleaning Energy Efcient Cleaning productionmachining.com :: 51 :: The chart shows energy and noise levels before and after the optimization measures were implemented, as well as individual results of the optimized drying process and the BvL exhaust management. energy efciency measures. Specifcally, the savings works out to 10.4 kWh, with the total consumption of the system at only 41.2 kWh instead of 51.6 kWh. Annual CO 2 savings is about 41 metric tons. Additionally, water consumption was reduced by a full 20 percent, and noise emissions were decreased by 5 dB(A). When BvL presented the options for increasing the energy efciency of the cleaning systems, SAMAG quickly realized the opportunity to attain their goals. Andreas Weigel, head of maintenance at the SAMAG Group explains that the decision to implement the modifcations was easy. "We have a very strong focus on the responsible use of energy resources in our company," he says. "And of course, we also keep an eye on the total operational costs of a system." Te energy saving package's amortiza- tion period, along with its contributions to environmental protection, made it an attractive option. BvL implemented several energy saving measures for the system. Te central element—exhaust air manage- ment—reduces the volume of exhaust air, which consumes the most energy in a continuous cleaning system. To achieve this, the system measures the moisture content in the drying zone and extracts only as much air as necessary for the process. "Tis creates the best possible moisture level in the system and the volume of hot exhaust air—and therefore energy—blown out of the system is kept as low as possible," says Peter Stahl, sales engineer at BvL. Te warm and moist air, and with it the energy, remains in the system. Cut the Noise In addition to energy savings, the requirement specifcation from SAMAG also limited the noise emissions directly at the discharge zone to 79 dB(A). Mr. Weigel says the sound level measurement was carried out at the measuring positions in line with DIN 45635 part 1 as well as at a "user-related" measuring point defned by SAMAG. According to the DIN measurement, the system achieves a workplace-related emission value of LpA: 68.6 dB(A). A structurally similar system from 2012, without optimization, reached a value of 73.6 dB(A), indicating that the signifcant noise reduction is because of the optimization measures. "In the same way, the BvL system achieved a value of 75 dB(A) at the user-related measuring point directly at the discharge position defned by us," Mr. Weigel says. Tis value is below the limit value stipulated in the requirement specifcation. "Te reduced noise emission is particularly important in our company, as we are continuously striving to improve the working environment for our employees." To reduce noise emissions, the speed of the fan in the drying phase was reduced. Mr. Stahl says the perfect ratio of low fow and high temperature provides an optimum drying result with minimum noise emission. Wash, Rinse, Repeat After a year in service, Mr. Weigel says he is absolutely satis- fed with the convincing results of the extensive tests and measurements on the cleaning system. Te company has not only ordered another system equipped with this energy saving package, but will also retroft all its BvL cleaning systems with the specially developed energy saving package to increase the energy efciency of all the production systems. For more information about cleaning systems from BvL Oberfächentechnik GmbH, contact German Machine Tools of America (GMTA) at 734-973-7800 or gmtamerica.com. For similar articles about parts cleaning equipment and processes, visit PM's Parts Cleaning zone. short.productionmachining .com/cleaning 50 kWh 40 kWh 30 kWh 20 kWh 10 kWh Continuous System Without Optimization Energy Expenditure: 51.6 kWh Optimization of Drying Energy Expenditure: 48.5 kWh BvL Exhaust Air Management Energy Expenditure: 42.8 kWh Result of Total Optimization Energy Expenditure: 41.2 kWh Noise Emission Before LpA: 73.6 dB(A) Noise Emission Afterwards LpA: 68.6 dB(A) 70 dB(A) 60 dB(A) 50 dB(A) 40 dB(A) 30 dB(A) 20 dB(A) 10 dB(A)