Study On Isothermal Compression Method Based On Micron-scale Copper Wire Heat Transfer

The shortage of fossil energy is currently the focus of attention on a global scale.Renewable energy such as wind and solar energy is the most competitive new energy form in terms of technology and cost,but the intermittent and non-renewable energy sources such as wind and solar energy Stability makes access to grid applications a huge challenge.Large-scale energy storage technology is an urgent need for large-scale application of renewable energy.Compressed air storage has the advantages of long storage time and long service life,which can be used to adjust the urban electricity demand and ease the power shortage at the peak of electricity consumption.However,compressed air energy storage also has shortcomings of low energy storage efficiency and long payback period.At present,most compressed air energy storage systems use adiabatic compression.When the compressed air is compressed,the temperature rises and a large amount of power is consumed into heat.Isothermal compression technology by the majority of scholars attention.Based on the isothermal compression technology,This paper presents a method for isothermal compression of micron-sized copper wire heat transfer.Established a mathematical model of micron-scale copper wire heat transfer;The non-dimensional coefficients Ka and Xu of piston heat exchange were analyzed.The influence of dimensionless coefficient on micron-sized copper wire heat transfer isothermal compression system is analyzed.An example calculation was made with Foam metal to form an isothermal piston,compression ratio of 7,speed 1200,the compression efficiency can be increased 11%.Built a test prototype for isothermal compression system,It is verified that the isothermal compression system of micron-sized copper wire heat exchange can greatly improve the compression efficiency.When the pressure ratio is 2,the adiabatic compression efficiency is 86%,the isothermal efficiency can be increased by 13%,and the isothermal compression system using micron-sized copper wire heat exchange can increase the compression efficiency to 99.3%.