Analysis of key technologies of cascade high-temperature heat pump driven low-carbon steam generation system
LIU Shuanqiang
Abstract：In response to the steam supply demands of large-scale chemical industrial parks,a cascade high-temperature heat pump driven low-carbon steam generation system is designed and implemented.This system adopts a dual working medium cascade cycle structure of R134a and R245fa,which can convert low-grade thermal energy into high-temperature steam at 160 to 180℃.Through theoretical analysis and experimental tests,the influence of factors such as the heat transfer temperature difference of the intermediate heat exchanger,the matching degree of the working medium charge,and the operating frequency of the compressor on the system performance is clarified.The results show that when the ambient temperature is 15～25℃,the coefficient of performance(COP)of the system is stable at 3.2～3.8.Compared with traditional coal-fired boilers,it saves an average of 2 850 t of standard coal annually,reduces CO2 emissions by 7 410 t,and has an investment payback period of 6.8 a.This system has obvious energy-saving and emission reduction effects as well as economic benefits,providing a new technical path for the low-carbon transformation of industrial steam production and is of great significance for achieving the goals of carbon peaking and carbon neutrality.
Keywords：cascaded heat pumplow-carbon steamenergy-saving and emission reductionthermodynamic optimizationutilization of industrial waste heat
Publication Date：2025-10-25
Online Publishing Date：2025-11-28(First online date of this platform, not the publication date of the document)
Pages：4( 84-87 )