| With the aggravation of global warming and the improvement of people's living standards,the energy consumption of refrigeration and air conditioning products is increasing day by day.Many energy efficiency indexes and energy-saving requirements are put forward for the refrigeration and air conditioning products in China,but these measures are aimed at the products themselves,often ignoring the energy consumption requirements in the process of inspection and test of refrigeration and air conditioning products.Based on the above background,this paper has carried on the energy-saving transformation to the Enthalpy difference Laboratory,which is the most widely used and the most energy consumption in the refrigeration and air-conditioning product detection device,and has carried on the comparative experimental research through the establishment of the experimental device.Finally,the research results have been applied to the example of the Enthalpy difference Laboratory to analyze its energy-saving effect.Firstly,this paper analyzes the energy consumption of Enthalpy difference Laboratory,the author points out that it is backward and energy consumption is high,and puts forward two improvements.One is to adopt the end valve stepless regulation refrigeration system to protect the compressor and realize the rapid transition of working conditions;the other is to recycle the condensation heat generated during the operation of the working condition machine configured between the environments on one side of the Enthalpy difference Laboratory to the environment on the other side,so as to improve the energy utilization rate and reduce the energy consumption.On this basis,two kinds of experimental devices for stepless regulation of end valves of refrigeration system are builted.Through the contrast experiment with the traditional thermal regulation mode,under the constant temperature and variable load,it is found that the response time of electromagnetic pulse regulation mode is 4.8%?9.1% shorter than that of traditional thermal regulation mode,and the response time of electronic combined regulation mode is 14.3%?23.3% shorter than that of traditional thermal regulation mode;under the condition of constant load and variable temperature,the response time of electromagnetic pulse regulation mode is 10.0%?16.7% shorter than that of traditional thermal regulation mode,and the response time of electronic combined regulation mode is 16.0%?33.3% shorter than that of traditional thermalregulation mode;in terms of temperature fluctuation,in both cases,the deviation between the maximum and minimum values of the air temperature stability of the electronic combined regulation mode is also significantly smaller than the other two,which is the best stepless regulation mode with the best performance.At the same time,two kinds of condensation heat recovery experimental devices,fluorine side and water side,have been set up.It is found that under the same cooling water temperature,the heat recovery efficiency of fluorine side is higher than that of water side,and the total heat recovery is about 20% higher than that of water side;the regulation range of heat recovery on fluorine side is wider than that on water side,about1.73 times of that on water side;after the introduction of the heat recovery system,the exhaust temperature of the compressor will rise,especially in the low temperature test,and the temperature rise of the compressor exhaust corresponding to the heat recovery on the fluorine side will be faster and higher,which will have a greater adverse impact on the compressor.Finally,the research results are applied to the energy-saving Enthalpy difference Laboratory built by an enterprise,and the maximum energy-saving capacity per hour of the energy-saving Enthalpy difference Laboratory is calculated to be 132.5k W·h,and the investment recovery period is estimated to be about half a year. |
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