In this paper, thermodynamic study of simple and regenerative gas turbine cycles is exhibited. Firstly, thermodynamic models for both cycles are defined; thermal efficiencies of both cycles are determined, the overall heat transfer coefficient through the heat exchanger is calculated in order to...

Purpose – The paper seeks to evaluate the changes in efficiency and productivity of coal‐fired electricity generation of 30 Chinese administrative regions from 1999 to 2007. Design/methodology/approach – The paper incorporates data envelopment analysis with the Malmquist index to study the...

Purpose – The purpose of this paper is to solve commitment problem of generating units in thermal power plants and to find the optimal dispatches of the committed units. Design/methodology/approach – The unit commitment (UC) problem has been solved in two stages. In the first stage, the...

Purpose – Climatic conditions in Poland vary tremendously each year with temperatures exceeding 25°C in the summer and sub‐zero in the winter. Therefore the provision of adequate heating and cooling in residential, public and industrial buildings is essential. Poland has recently embarked...