Evaluation of Small-Scale Gasification for CHP for Wood from Salvage Logging in the Czech Republic

Forests

Arkadiusz Gendek¹  Monika Aniszewska¹  Jitka Malaťáková²  Martin Jankovský³  Jan Malaťák⁴  Jan Velebil⁴  Barbora Tamelová⁴ 

[1] Department of Biosystems Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences—SGGW, Nowoursynowska 164, 02-787 Warsaw, Poland;Department of Economics, Faculty of Economics and Management, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic;Department of Forest Technologies and Construction, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic;Department of Technological Equipments of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic;

关键词: spruce;    gasifier;    salvage logging;    bark beetle;    net present value;    internal rate of return;   

DOI  :  10.3390/f12111448

来源: DOAJ

【 摘 要 】

This study focused on small gasification units for combined heat and power generation (CHP) up to 200 kW of electric power, which can use wood from salvage logging, and assessed the current feasibility of running commercially available units in the conditions of the Czech Republic. In total, the technical and economic parameters of 21 gasification units from ten major international producers were compiled. One of the most important parameters assessed was the net calorific value, which in the analysed samples of spruce wood was determined at 18.37 MJ kg⁻¹ on a dry basis. This complies to the requirements for fuel quality for these units. The economic profitability was determined for three investment variants with electric power of 10, 100, and 200 kW_el in an operating mode of constant power at 20 and 30 wt.% input moisture level of the wood. Economic analysis showed that smaller alternatives with an output of 10 and 100 kW_el produce economic losses. On the other hand, the 200-kW_el alternative produced operating profit and positive cash flow at both fuel moisture levels in the first year of operation. The evaluation of individual alternatives using dynamic investment evaluation methods also showed that only the alternative with an output of 200 kW_el with both fuel moistures was able to produce a positive net present value.

【 授权许可】

Unknown