| Abstract [eng] |
The biofuel, analyzed in the dissertation (wet wood chips as a source of energy production) is already widely and efficiently (using flue gas condensing economizers) used in heat and power stations. However the aforementioned condensing economizers are also today's limit that needs to be crossed in order to make energy production even more efficient. Therefore, increasing the efficiency of energy production cannot do without the introduction of new technologies in existing energy production systems that are able to use waste heat (specifically, smoke that is emitted into the atmosphere through a chimney). The paper reviews various options for waste heat utilization - heat transformation machines, regenerators, heat pumps. Heat pumps are the most developed technology, which is used to analyze how much waste heat can be additionally recovered by cooling biofuel flue gas below its dew point (after the condensing economizer). To achieve the aims of this study, the calculation algorithm for biofuel smoke cooling is presented, which defines the amount of waste heat to be recovered. Additionally, an additional flue gas cooling system is proposed (using novel heat exchanger) together with an evaluation of its efficiency (technical and economic). |
