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1 2011

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Methods of efficiency enhancement of supercritical fossil power units by the recovery of waste heat from the boiler exhaust gases

Łukowicz H., Kochaniewicz A.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2011

nr 140

131-140

In the paper the diverse methods of heat recovery from the fossil boiler exhaust gases were analysed. A characteristic feature of these methods is the fact that they use low-temperature heat which is an exhaust loss. The following types of heat recovery from exhaust gases of hard- and brown coal fired boilers were considered: - heat water in the turbine system of heat recovery, - application of a small ORC unit together with the coal-fired unit, - drying of brown coal fed into the boiler. The goal of each of these methods is to increase the efficiency of the power unit. Efficiency enhancements depend on the proposed method, the variant and the type of fired fuel.