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Chen S.-Q.,Hunan University of Science and Technology | Chen S.-Q.,Hunan University | Chen S.-Q.,Hunan Province Engineering Research Center for Mine Ventilation and Dust Removal Equipment | Wang H.-Q.,Hunan University of Science and Technology | And 3 more authors.
Journal of Coal Science and Engineering | Year: 2012

The main fan diffuser in a coal mine is an energy-recycling equipment with a dynamic energy loss for the main fan. Engineering practices and related researches show that the body structures of three types of diffusers are irrational. To solve the problem, an energy-saving diffuser is designed on the basis of the velocity potential theory. Under conditions of inlet velocity from 7 m/s to 32 m/s, 7 condition experiments using the energy-saving diffuser of 2.31 AER (area-enlarging ratio) and 5 condition experiments using the energy-saving diffuser of 2.00 AER were conducted. Through a comparative analysis of the experiments, the results show that the COP (coefficient of performance) of the energy-saving diffuser of 2.31 AER is better than that of the energy-saving diffuser of 2.00 AER. © 2012 The Editorial Office of Journal of Coal Science and Engineering (China) and Springer-Verlag Berlin Heidelberg. Source


Wang H.-Q.,Hunan University of Science and Technology | Wang H.-Q.,Hunan Province Engineering Research Center for Mine Ventilation and Dust Removal Equipment | Zou Z.-Y.,Hunan University of Science and Technology | Chen S.-Q.,Hunan University of Science and Technology | And 3 more authors.
Journal of Coal Science and Engineering | Year: 2010

In order to improve the thermal environment of high-temperature heading face, moisture content of supply air is reduced by dehumidification, and the relative humidity of environment air of the heading face is also decreased. First, according to the coefficient of performance of dehumidifier, the capacity of dehumidification was calculated. Second, in the engineering example of the heading face, quantitative changes of WBGT (Wet Bulb Globe Temperature) were compared between with dehumidification and without dehumidification. Based on WBGT standards, the thermal comfort of high-temperature environment of heading face was evaluated between with dehumidification and without handling. Reducing the relative humidity of airflow through dehumidification, the thermal comfort of a high-temperature environment of heading face can improve greatly. Even if dry bulb temperature of airflow is not decreased, the thermal comfort of heading face environment is also improved to some extent. © 2010 The Editorial Office of Journal of Coal Science and Engineering (China) and Springer-Verlag Berlin Heidelberg. Source

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