Study On Heat Transfer Of Cooling Water Conveying In Deep Hole Of Coal Mine And The Application In Mine Cooling

According to the actual situation, Inoue centralized refrigeration system ispresented in this paper for governance heat harm of mine through the abandonedunderground drainage riser to transport the cooling water. The construction isconvenient and cost savings. The design problem of this way is proposed. Drain isburied depth of666m through the constant temperature layer and the geothermaltemperature rise. So the cooling water loss can not be ignored. There is a need forresearch to ensure the rationality of the air conditioning system and solve practical minethermal pollution problems.Through the study of heat transfer mechanism of deep hole water conveying, Heattransfer mathematical model is established, and the theory of heat transfer coefficientcalculation formula derived tube. It is concluded that the heat transfer and the originalrock of the roadway rock temperature, wall temperature, tube and the speed of the watertemperature.By establishing the differential equation of heat transfer, determine the way ofexperiment and research to ensure that the experimental research and practical. Throughthe similarity theory to establish the experimental model, and set up horizontal testbench, including pipeline system, temperature measurement system, heating system,testing and data collecting system. Through the test9kinds of working condition, workout heat loss change rule, tube wall temperature, soil temperature, and according to theexperimental data, through the criterion equation, calculated in the case of the differentconvection heat transfer coefficient correlations.Through numerical simulation of engineering practical way of heat transfer,calculate the heat loss and the temperature difference. It is concluded that the mainfactors influencing the exothermic coefficient is the speed of the fluid, the physicalproperties of the fluid and the condition of the heating surface. Finally, through practicalengineering calculation, it is concluded that the research background of the actualproblem, finally putting forward solutions and rationality.In this paper, search the economic and reasonable way of transporting cold for themine cooling, laying theoretical basis for its popularization and application...