The Study Of The Frozen Wall Technology Refrigeration System Based On Natural Cooling Source

The establishment of underground mining of oil shale in situ freezing of the wallis an artificial refrigeration technology. The cooling process requires a large numberof underground soil and water that can be frozen. The refrigeration equipmentrequires a lot of energy. The northeast of China has long and cold winter and has tonsof natural cooling sources that could be harnessed. Underground air-cooled heatexchanger system located in the natural source of cold air. It could directly use thesurrounding air to perform the cooling process. And the energy conservation space isenormous.Natural air cooling can be used in the underground permafrost Wall. There is noprecedent at home and abroad. Air-cooled heat exchanger cooling systems researchbasing on the use of natural sources has direct economic meaning. Determine theair-cooled heat exchanger law and accordingly provide a reference for optimaloperation of the entire frozen wall, particularly the numerical simulation study alsohas great significance.This paper made the following research basing on the natural cooling source forair-cooled heat exchangers：（1） The design of frozen underground oil shale wall air-cooled heat exchangersystem.Accord to the whole design and requirements of the frozen underground oil shalewall air-cooled heat exchanger system，we propose the design of air-cooled heatexchanger system. Based on the theory of heat transfer, fluid mechanics and heatexchangers and other related aspects’ direct impact on the use of critical componentsof air-cooled heat exchange system’s calculation; we conduct the calculation of theheat exchange system’s finned tubes. We take the air-cooled heat exchanger as thecore to complete the selection and calculation of the other parts of the system.(2)The numerical simulation of frozen underground oil shale wall air-cooled heat exchanger systemThe application of Ansys/workbench thermal,we establish the finned tubes’ heattransfer model; from the aspects of heat exchanger, we can optimize the heatexchanger.(3) Natural cooling source for air-cooled heat exchangers impact simulation andoptimizationThrough Ansys/workbench CFD, we study the air-cooled heat exchangertemperature distribution under different temperatures and under different windanalysis. we come to the conclusion that the heat exchanger under the law of the coldsource.(4) Experimental study of frozen underground oil shale wall air-cooled heat exchangersystemBuilding construction project in Jilin University, the practice base freeze wallunderground experimental platform, the experimental data with theoreticalcalculations comparing the effect of heat, air-cooled heat exchanger system to verifythe feasibility of using natural cooling source used in refrigeration cooling walltechnology, energy efficiency.In conclusion, the natural source of cold air-cooled heat exchangers are used inunderground permafrost wall systems to achieve economic energy efficientenvironmental goals. Optimization of air-cooled heat exchanger systems analysis as apart of the underground freeze wall system, whereby you can provide a referenceguide for the entire underground freeze wall run.