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Paper analyses the principles and industrial applications of thermoelectric generators and energy harvesting devices in their almost 200-year history, e.g. from first documented application in 1840 till the current applications focusing on thermoelectric generators using waste heat from fireplace furnaces. Moreover, the energy harvesting devices as low power applications are involved in the paper. Applying the thermoelectric generators into existing products gives the managers an ability to innovate, be unique and...

This paper aims to explore the efficiency of energy consumption on farms of different economic sizes in Latvia. Burning fossil fuels to satisfy a continuously growing demand for energy created by the industry, transport and households has been a cause of concern for several decades. It has been widely acknowledged as one of the major reasons for a massive increase in greenhouse gas emissions, a dramatic rise of global temperature and ongoing climate changes. Since farms use energy not only directly by operating ma...

In Romania, the production of coal and lignite depends on the national demand for primary energy resources in the electricity production sector and on the available resources / reserves. Although it still plays an important role in the mix of electricity production and the safety of the National Energy System, especially in the winter, coal-fired electricity production is decreasing even this season. The considerations for which this situation was reached are: the programs for extractive industry reorganization an...