Turunen T.,Metso Paper Inc. |
Heinonen L.,Paperra Oy |
Banecki R.,Metso Paper GmbH
Wochenblatt fuer Papierfabrikation | Year: 2011
Progress has been made in reducing specific energy use and carbon dioxide emissions in fiber and paper manufacture in recent years and this reduction will play an increasingly significant role in the future. The 17 theses proposed to effect this reduction are grouped into three universal theses, six theses relating to the operational environment of paper machines, and eight theses related to the method of working. The universal theses state the kind of energy generation and energy use determine the loading of the environment; the quality of the energy is significant; and energy is not used up, only its form changes (exergy decreases and entropy increases). The theses on the immediate environment in which paper machines operate state the structure of the paper plant influences the energy efficiency of the paper machine; material, water, and energy efficiencies are interdependent; energy efficiency must be reliably measured, observed, and analyzed; the absolute consumption is an important characteristic; benchmarking requires the correct bases of comparison; and in exceptional circumstances energy is also used up. The theses related to the method of working state during planning the framework conditions for energy are created; energy efficiency can be optimized with guidance; process conditions are consistently and systematically to be carried out; maintenance can promote energy efficiency; increasing paper machine efficiency improves energy efficiency; measures to improve energy efficiency ought not to impair the process function; the sum of the individual potentials to save energy is not the same as the achievable overall energy saving potential; and the personnel must be motivated to improve energy efficiency. In the improvement of energy efficiency the value of the energy saved with respect to exergy, environment, and costs is to be considered. Because of the high energy intensity of the paper industry, savings of 1% in energy measured in joules or kilowatt-hour represents a significant savings.