Автор: Veselin Brezin

Статии

CALCULATION OF THE ENERGY CONSUMPTION FOR DEFROSTING OF THE WOOD CHIPS

Автори: Nencho Deliiski, Veselin Brezin, Izabela Radkova, Anton Geffert, Jarmila Geffertova, Natalia Tumbarkova

Резюме

Аn approach for the calculation of the specific mass energy consumption  (in kWh.t-1) needed for defrosting of the wood chips, which contain both frozen bound an free water, has been suggested. For the calculation of the  a software program has been prepared in MS Excel 2010. With the help of the program calculations have been carried out for the determination of  for oak, acacia, beech, and poplar frozen chips with moisture content in the range from u = 0.4 kg·kg-1 to u = 1.0 kg·kg-1 and with an initial temperature at the range from t0 = –40 oC to t0 = –1 oC. At temperature equal to –1 oC the defrosting process of the wood chips has been fully completed.

Ключови думи: wood chips, defrosting, frozen bound water, frozen free water, specific mass energy consumption

EN Version

STRATEGIC PERSPECTIVES OF BULGARIAN PLYWOOD PRODUCTION AND TRADE

Автори: Nikolay Neykov, Petar Antov, Veselin Brezin

Резюме

Plywood manufacturing is one of the most important production lines and value adding alternatives in woodworking industry. Plywood production volumes have increased rapidly in the last few years all over the world and especially in Asian countries. In this new environment the European manufacturers face a great competition. In these market conditions the manufacturing companies can either do better, extracting the best they can and providing much greater quality, or go down to slow and painful market dropout. Bulgaria is on the crossroad- to improve its plywood production in terms of investments and quality, or let its manufacturers in stagnation, waiting until their doors get closed. All these facts define strategic analyses that can outline the future improvement of Bulgarian plywood production as a question of present interest for the woodworking industry.

Ключови думи: plywood, Bulgaria, strategies, analyses, matrices

EN Version