Experimental Research On Compound Air Conditioning System Based On Fluoride Pump Boosting

The establishment of a large number of data centers has provided support for the rapid development of information technology,and its energy consumption is also increasing,accounting for about 3% of the total electricity consumption of society.The energy consumption of the air-conditioning system used to dissipate equipment in the data center accounts for about 40% of the total energy consumption of the data center.Therefore,the energy-saving transformation of the air-conditioning system in the data center has far-reaching significance for energy conservation and emission reduction in the entire society.At the same time,because the data center air-conditioning system needs to run all year,it is required that it can meet the cooling demand under different outdoor temperature conditions.This paper designs a refrigeration air conditioning system based on fluorine pump booster,and conducts experimental and theoretical research on it.This paper first analyzes the thermal characteristics of a compressed steam refrigeration system,a fluorine pump booster refrigeration system,and a single fluorine pump-driven refrigeration cycle based on a pressure-enthalpy diagram.A three-unit household split air conditioner was retrofitted,and an experimental prototype of a fluorine pump booster air-conditioning system was built.The refrigeration performance of the prototype was tested in an enthalpy difference laboratory under different outdoor conditions.First,in the compressed steam mode,find the effective adjustment range of various throttling devices by reducing the outdoor unit temperature,set the fluorine pump intervention temperature node,and then maintain the evaporator outlet superheat by controlling the frequency of the fluorine pump under different outdoor temperature conditions.Stable.Finally,test the performance of the system under various outdoor working conditions when the single fluorine pump is driven.The experimental results show that the experimental prototype tested in this paper can operate normally when the outdoor temperature is greater than 10? when the compressed steam mode is enabled.When the outdoor temperature is lower than 10?,the opening of the electronic expansion valve reaches the maximum and cannot be adjusted.The superheat degree of the refrigerant at the outlet increases,and the liquid supply of the refrigerant in the evaporator decreases.Opening the fluorine pump booster system in the range of-5 ? ? 10 ? outdoor temperature can effectively increase the system flow,correspondingly increase the cooling capacity and COP of the system.When the ambient temperature is below-5 ?,it can be achieved by turning on the fluorine pump drive alone.The rated cooling capacity of the compressed steam mode.At this time,due to the application of natural cold energy,the COP can reach 19 or more.In order to discuss the universality of the fluorine pump booster system in different systems,a heat transfer model of the evaporator and condenser was established,and the fluorine pump booster system was simulated and calculated.It is estimated that different specifications of evaporators and condensers,different indoor and outdoor workers are used.The operating performance of the system.Finally,the energy-saving effect of this system in different climatic regions of China is explored,and it is found that it has good energy-saving effects on the basis of satisfying operating performance in various regions of China.