Presentation of the ’ company
Thermi-Lyon is a small company specializing in heat treatment and coating in a vacuum. On the site of Lyon, the company has several types of ovens (carburizing, nitriding, hardening...) and associated utilities (production of compressed air, hydraulic system of cooling...).
Context and challenges
In this industry, energy is an important item of expenditure. This is confirmed at Thermi-Lyon where energy represents almost 10% of the turnover. Aware of this issue of competitiveness, the company in the EE-METAL program to continue its efforts on energy efficiency.
Thanks to the energy audit, the company got a clearer vision of its energy consumption by type of equipment. Actions were able to be implemented to optimize the process the more energy efficient while taking account of economic interest (ROI):
- Change of air compressor (lowering of power + engine with variable speed): economy of 122 MWh/year (10 k€ / year) with a King of 1 year
- Optimization of the cooling system of the ovens: rationalization of the piping on the hydraulic network + speed variation on pumps with pressure control: economy of 175 MWh/year (15 k€ / year) with a 5 year King
All of the energy saving measures identified during the audit represents a potential of close to 20% of annual energy consumption. Other actions will be studied in order to continue to improve the energy efficiency of the company (the performance of processors increase, optimization of the temperatures and the operating time of the furnaces, insulation of ovens... ).