地源熱泵水蓄能復合系統(tǒng)綜合性能評價研究
[Abstract]:The energy crisis is becoming more and more serious. From the point of view of energy saving and emission reduction, the economic and environmental advantages of the air-conditioner project with the combination of ground-source heat pump and water-storage energy are becoming more and more prominent. With the increasing application of the composite system, how to evaluate the system scientifically has become an urgent problem in HVAC industry. At present, there are still some problems in the comprehensive performance evaluation method system of composite air conditioning system, such as uneven evaluation models, unclear evaluation factors and strong subjectivity of evaluation methods. Based on the comprehensive performance evaluation of ground-source heat pump water-energy storage composite air conditioning system and eQuest energy consumption simulation software, based on the summary and analysis of domestic and foreign research status, the network analytic hierarchy process (ANP),) is adopted in this project. Cluster analysis and weight sensitivity analysis are used to study the selection of evaluation factors and their weights, weight sensitivity analysis and so on. The main work and conclusions are as follows: (1) on the basis of reference to relevant literature and norms, Combined with the characteristics of ground-source heat pump and water-storage air conditioning system, the following evaluation factors are selected: conventional energy substitution rate, annual transfer peak electricity rate, annual valley electricity utilization rate, refrigerant environmental performance, carbon dioxide emission reduction rate, Static investment payback period and net present value rate. On the basis of the data of expert questionnaire, the corresponding weights of each evaluation factor are calculated by Super Decisions software. (2) the hourly load and mathematical model established by eQuest energy simulation software are obtained. The multivariable working conditions of office buildings and market buildings are calculated, and the results are classified and analyzed respectively, and the local source heat pump water storage compound system is determined to be used in the above two types of buildings. (3) the index weight sensitivity analysis method is introduced to the comprehensive performance evaluation system of composite system to test the influence of each weight change on the evaluation results. Through the research, it is found that the sensitivity index of the composite air conditioning system used in office buildings and market buildings is the static investment recovery period and the carbon dioxide emission reduction rate. Static investment recovery period and net present value rate (NPV). (4) by using the proposed comprehensive evaluation method, a ground-source heat pump water storage compound system in an office building is evaluated, and the results show that the system is superior, However, there are still some problems such as the high payback period of static investment and the need to optimize the operation strategy. The application example shows that the proposed comprehensive evaluation method can not only be used to evaluate the system performance, but also provide guidance for the optimization direction of the system.
【學位授予單位】:天津大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TU83
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