循环流化床锅炉深度调峰过程能效评价方法研究OA

There are significant differences in boiler efficiency values among different units,and the variation tendency with load during peak regulation also varies among units.Energy efficiency evaluation of peak regulation process is a prerequisite for unit benchmarking and operation optimization.The energy efficiency characteristics of boilers during variable load processes were analyzed.Generally,as the unit load decreases,the boiler efficiency shows a downward trend.When the unit load is below 50％of the rated load,the downward trend of boiler efficiency becomes more pronounced.But under low load conditions,boiler efficiency can also be significantly improved through retrofitting and operational optimization.Based on the quasi-steady-state concept,a weighted average energy efficiency calculation method ac-cording to load rate and operating duration was proposed.Firstly,performance tests should be conducted under no fewer than 4 operating conditions at 30％,50％,75％,and 100％load to obtain efficiency curves.Secondly,the load variation curve during peak regulation process should be segmented as finely as possible,and the boiler efficiency corresponding to each load interval can be directly obtained from thermal performance tests or determined through fitted efficiency curves.Finally,based on the load rate and the proportion of operating duration,the weighted average steady-state boiler efficiency can be calculated,and efficiency correc-tions related to dynamic load changes can also be further introduced.If the efficiency changes significantly with load,using this method can easily achieve accurate evaluation of energy ef-ficiency in deep peak regulation processes,providing a reference for operation optimization of boilers duringdeep peak regulation.