Open AccessInvestigation on the new design method of heat source for reducing the energy consumption in the shaft antifreeze system
Author(s) -
Yanbin Bai,
Lizhong Yang,
Zheng He Song,
Weiwei Tang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/675/1/012184
Subject(s) - heat load , environmental science , antifreeze , air source heat pumps , compensation (psychology) , coefficient of performance , heat pump , nuclear engineering , meteorology , mechanical engineering , engineering , thermodynamics , heat exchanger , psychology , psychoanalysis , physics
In order to suppress the heat consumption for shaft antifreeze in coal mines, this study first analyzed the meteorological data required for shaft antifreeze in typical five cities (Harbin, Yulin, Hefei, Guiyang, and Nanning) located in different climate zones in China. The analysis results explain why some shaft heating measures must be taken in severely cold regions. So, in this study, Harbin is taken as the case city for research to show that the traditional heat load design methods have the problem of mismatching between the actual heat load and the designed heat load. Next, the annual temperature change analysis in Harbin reveals that the occurrence frequency of the extremely low temperature in a year is small and its continuation time is short. According to this finding, a new heat load design method is proposed based on the dual heat source usage. In this new method, the main heat source will be designed for flat-peak heat load compensation and the standby heat source will be designed for peak heat load compensation. The main heat source should be selected based on the outdoor calculated temperature for the shaft antifreeze system. The standby heat source should be selected based on the mean value between the average of the year-over-year lowest temperature and the outdoor design temperature for the adit system and on the average of the year-over-year lowest temperature for the vertical/inclined shaft system. The standby heat source accounts for 13% of the total heat load and the main heat source accounts for 87% of the total heat load in the adit system. On the other hand, the standby heat source accounts for 23% of the total heat load and the main heat source accounts for 77% of the total heat load in the vertical/inclined shaft system.