Method And Optimization Of Thermal Energy Consumption Analysis Based On The Second Law Of Thermodynamics

This article aims to discuss energy analysis and optimization of thermal systems. Taking coal-fired units in the thermal system for example. To study the thermodynamic system typical irreversible losses related issues such as the size and distribution by using energy analysis methods. Firstly, based on the basic laws of thermodynamics and specific consumption theory, by analyzing the 1000MW coal-fired units typical thermodynamic irreversibility of the process, and then make the appropriate analytical methods to derive calculated using a mathematical model. Secondly, the irreversible loss calculation model of the one million unit is used for quantitative analysis and calculation. Analysis of the data are each unit of thermal equipment in BMCR and TMCR condition parameters, A Variable load calculation on Different load conditions of the boiler"four Tube", turbine heat recovery system is carried, and the Distribution rules irreversible loss.And the BRL and TRL condition parameters are taken advantage to calculated irreversible loss of the entire crew.Finally, according to the calculated heat recovery system irreversible loss distribution, combined with specific consumption analysis theory, the second law of thermodynamics optimization of turbine heat recovery system1.Thermal systems energy analysis method proposed in this paper can be a good applicable to coal-fired units, Calculations show that the unit by the irreversible loss of heat during the descending order of the temperature difference between transforming exergy loss, throttling exergy losses and heat exergy loss. For the boiler in Unit, the irreversible loss generated at the water wall to be significantly higher than that of the superheater and reheater. Thus reducing heat loss at the Wall helps to improve the energy efficiency of the system.2.Using the calculated results derived energy analysis methods to optimize the unit, Optimization results show that the unit in variable condition operation with decreasing load and water temperature, an additional group of lower consumption heater more obvious when the heat recovery system transform form "three high four low one oxygen" to " four high three low one oxygen."...