Optimization And Application For Energy And Material Saving Of Typical Electromechanical Products Based On Energy Flow Modeling

Energy and materials saving has become the important content ofsustainable development in the current society. The concept that using theenergy and material saving method and technology in design stage has beenaccepted by most of the enterprises, but the energy saving method can’t beutilized fully because the conflict often exists between the energy savingmeasure and performance achievement, the current design for energy savingsystem can’t conduct to solve the conflict effectively. As the key factor ofenergy saving design, energy is also an important guarantee for the performanceachievement. Reasonable energy flow and distribution can reduce the energyand resource consumption as much as possible, meanwhile the productperformance achievement can be fully guaranteed, the energy saving measureand performance achievement can be balanced effectively. Therefore,researching on energy and material saving of typical electromechanical productsbased on the energy flow analysis has important significance and practicalvalue.At first, the performance expression and constraint decomposition forenergy flow analysis is proposed in this dissertation to limit the applicable scopeof the energy flow analysis method, and also the performance constraint can betransformed from the qualitative performance description to quantitativeindicators. Energy flow element (EFE) is introduced as the basic object ofenergy flow analysis model, and its modeling process involves three key factorswhich are energy flow element partition, interface description, and energychange state analysis. The carrying capacity and performance influence style ofcomponents can be qualitatively achieved by analyzing the interface relationsand energy change states between different energy flow elements, which are thetheoretical foundation to address the conflict between the performanceconstraint and energy saving design measures.Based on the energy flow analysis model, two indicators of performancepertinence (PP) and performance margin (PM) are proposed to quantitatively analyze the effect of energy change and distribution for the final performanceachievement. PP of component can be modeled by the numerical calculation andregression analysis of experimental data with the result of concerned partsselection. Calculation model of PM can be achieved by the analysis of expectedenergy distribution ratio. Considering the calculation results of PP and PMsynthetically, the conflict solution guideline based on energy flow analysis ispresented, which provides a method guarantee for the solution of conflict.The air duct system of split air-conditioner’s outdoor unit and vehicleframe of SUV are selected as the research objects, and their own conflictproblems are expressed and modeled by the energy flow analysis method. Basedon the energy flow analysis and calculation results, optimal solutions for the twoproducts are proposed to improve the energy efficiency of duct system andlightweight the vehicle frame with their own performance constraint, which alsoverifies that the method is effective. The software system for energy flowanalysis is developed to provide the tool for practical application of the energyflow method in the enterprise.