Abstract
On the base of available data, it is estimated that the industrial approx. 20-50% of the energy is removed into the atmosphere as waste heat include in the form of hot flue gases, cooling water, the heat losses from the equipment hot surfaces or heated products. However, according to the data from the US market in 2010, in the form of waste heat is emitted more than 96 · 106 TJ annually (2.7 · 1010 MWh), means more than 57% of the produced energy. According to statistics, currently the energy production in the US amounts to approx. 26% of the world's energy production. Assuming the same indicators, the total annual amount of waste heat in the scale of the world equals 370 · 106 TJ (10.4 · 1010 MWh). One of the ways to increase the energy efficiency of manufacturing processes and reducing energy consumption and negative impacts to the environment is the use of waste energy [1,2,3] In this work it was investigated the possibilities of the waste heat utilization from conventional thermal power plant using thermoelectric generators, the operation of which is based on the Seebeck effect.
Highlights
Nowadays, one of the major economic problems is the increasing energy consumption
The study analyzes the possibility of the thermoelectric generators use in a steam, OR-32 grate boiler, behind which is placed the small electrostatic precipitator for flue gas cleaning
Considering the obtained results, for systems with thermoelectric efficiency of 1.9%, or such as that achieved at the AGH University of Science and Technology it is noted that the parameters characterizing the OR-32 boiler electric power will be from about 7 to about 13 kW, depending on the temperature to which the flue gas are cooled
Summary
One of the major economic problems is the increasing energy consumption. This results in a rapid depletion of fossil fuel resources. The simplicity of thermoelectric phenomena allows its use in various industries, in which the main waste product is in the form of heat with the temperature of several hundred degrees. 30% of the total heat from burning fuel This heat instead of giving ineffectively to the environment, can be though to some extent re-use. This will increase the efficiency of the drive system. The use of thermoelectric generators to convert about 6% derived waste heat will reduce fuel consumption by up to 10%
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