The energy system can be divided into two subsystems: transportation and fixation. The supply, demand and distribution facilities in each system are highly compatible.But they are independent of each other.
Chinese name
energy system
Foreign name
energy system
Role
Improve energy efficiency and supply
Properties
A subsystem of social economic system
Composition
Exploration, mining, transportation and other processes
We need to deepen some important research fieldsResearch, such as improving energy efficiency, integrating power transmission, distribution and storage systems with various renewableenergyOrganicintegrationTo improve the future energy supply.Biofuels, solar energy and other technologies are still in the research and development stage, which can not really meet human energy needs, so we must continue to innovate, improve and improve existing technologies or develop new technical solutions.
Energy system is the whole process of transforming natural energy resources into specific energy service forms (effective energy) required by production and life of human society.It is abstracted for the purpose of studying the laws of energy conversion and useSocio economic systemA subsystem of.It usually consists of a series of process links and equipment such as exploration, mining, transportation, processing, distribution, conversion, storage, transmission and distribution, use and environmental protection[1]。
Energy system engineering
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Energy system engineeringSystem scheme and supporting implementation process of energy construction and development.That is to say, in the whole process of energy development, transformation and use, the optimal rules, optimal design and optimal management are implemented to form an energy construction system that meets the needs of economic and social development.China established the Energy System Professional Committee in 1981.In addition to organizing the national energy academic seminar, it also organizes the national energy model research andEnergy soft scienceResearch, etc.Features and requirements of energy system engineering: (1) integrity.It absorbs the new achievements of systems theory, operational research and other disciplines, makes an overall investigation on the multiple components of energy that are interconnected, interdependent and interactive, and makes reasonable arrangements to make each part of energy construction subordinate to the overall goal, so as to achieve the best results.(2) Scientific.Through rigorous methods and relatively accurate data, the quantitative and qualitative analysis of energy problems, the formulation of a scientific energy development plan, and the definition of tasks at all stages of energy construction, make the coordinated development between energy and various sectors of the national economy.(3) Practicality.Since the 1960s, the industrial developed countries have applied the system engineering (SE) method to seek the optimization of the overall energy;The application of value engineering (AE) method can minimize the cost of completing the same "function".Energy system engineering is the embodiment of modern economic management and the necessary condition for the development of energy cause[2]。
Energy system engineering is an optimization technology of organization management and operation management for planning, research, design, manufacturing, testing and application of energy system.It is a branch of system engineering.Guided by the system viewpoint and system thinking mode, the energy model is established by using modern mathematical methods, system technology and computer technology, and the energy system is simulated and analyzed to plan the integration, efficiency and optimization of energy development and utilization.The main contents include energy prediction, planning, planning, evaluation, feasibility study and various system analysis.Energy system engineering plays a very important role in formulating national or regional energy planning, evaluating energy policies, strengthening scientific energy management at all levels, and promoting the effective use of energy[3]。
Overall energy system
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The overall energy system is a system designed to supply and distribute electricity, heat energy and cooling demand for a building, an integrated building group, or a factory based on a single fuel input[4]。
Energy system management
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Energy system management is a systematic and scientific management activity formed in the decision-making and implementation process of energy development and utilization.A system is a collection of interrelated things.Management is to dredge and control things to make them run orderly.Energy system management is to make energy management objectives, management contents, management forms and management means achieve unified coordination and overall efficiency. It is the application of system theory in energy work.As a large system, energy management generally includes four systems, namely, energy material resources, energy human resources, energy information resources, energy materials and equipment management.The objectives, tasks and basic requirements of energy system management are to make rational development and utilization of energy resources, reasonable energy investment, implementation of energy conservation, environmental protection of energy, energy innovation and development of new energy, etc., so as to achieve the overall balance of energy, mutual promotion and common development of energy and other economic sectors.Management forms include economic, technical, administrative and legal aspects.Energy system management has reached a high level in developed countries, which is the social factor for developed countries to achieve high energy utilization rate[5]。
Energy system efficiency
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The efficiency of the energy system is the overall balance of the efficiency of all links in the energy system, such as development, processing, conversion, transmission, storage, distribution and utilization.It reflects the effective and rational use of energy in the energy system.It is affected by many factors such as nature, technology, economy, management and society[6]。
Energy system model
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The energy system model takes all kinds of energy as the object to study the mathematical model of the relationship between the demand and supply of energy.Taking advantage of the substitutability of various energy sources, put all kinds of energy sources together for overall research, carry out reasonable distribution of various energy types, select reasonable energy processes, and reasonably transform energy equipment, so as to obtain the best energy system that meets the balance between supply and demand.The energy system model plays a very important role in formulating a national or regional energy development plan, energy conservation plan and evaluating energy distribution policy, energy technology policy and energy technology equipment policy[3]。
The energy model system is also called "energy model system".The system consists of several relatively independent but interrelated models related to energy technology and economy.It has gradually become popular since the mid-1970s.It is generally coupled by several models, such as objective economic model, industrial sector correlation model (i.e. input-output model), energy system model, energy industry and market model.Through information transmission and feedback among models, multiple iterations can achieve the balance of the whole system and provide the optimal scheme.The energy model system can be used to comprehensively and quantitatively study the energy economic problems of a country or region, and is a powerful tool for energy system analysis[3]。
Source system network diagram
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The source system network diagram is a simplified and abstract graphical model describing the energy system according to the actual energy flow direction of each link in the whole process of energy from exploitation to final consumption.It is a network flow diagram representing the structural relationship of the energy system.The arrow on the line segment indicates the flow direction of energy;Data such as process energy flow, process efficiency, process cost and process environmental pollution factors are marked above and below the line segment.Energy system network diagramIt can describe the whole picture of the energy system of a country, region, department or enterprise, accurately represent the various components and main characteristics of the system, and can be used for quantitative analysis. It is an important tool for establishing energy models and conducting system simulation analysis[3]。
