The Multi-Energy Coupling System (MECS) Design Scheme For Campus

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This paper first distinguishes the Multi-Energy Coupling System (MECS) from the Energy Internet and the Integrated Energy System, and defines technique features of the Multi-energy Coupling System. Then, on the basis of the CCHP technical proposal and the photovoltaic configuration, a MECS design scheme which is suitable for campus is presented. Next, by studying the cold, hot, and electric load characteristic of a typical campus which is located in Hebei province, we allocate the Multi-Energy Coupling System. In addition, this paper analyses the economic benefit, the environmental benefit, and the energy-conserving benefit of the MECS. Introduction Nowadays, the problems such as energy shortage, environment pollution is more and more become one of the key factors which restrict the development of the world. To improve and solve these problems, experts put forward several new energy system concept, such as the Energy Internet, the Integrated Energy System and so on. In reference [1], a famous American scholar J Rifikin put forward the vision of the Energy Internet for the first time, and most studies about this concept are focus on solving the problem of energy development on the angle of Internet. The Integrated Energy System is in the process of planning, design, construction and operation, through the generation, transmission and distribution of all kinds of energy (energy supply network), conversion, storage and consumption, social comprehensive energy supply, which is formed by the Integrated System. The Multi-Energy Coupling System (MECS), in contrast, much more from the system perspective to consider issues such as energy distribution. It mainly has the following technical characteristics: (1) The Combined Cooling, Heating, and Power (CCHP) system. This running mode refers to the natural gas as the main energy, the high grade heat energy to generate electricity, low grade heat energy to generate heating and cooling. (2) Clean and renewable energy. Traditional CCHP system combined with renewable energy, the internal load fluctuation can be effectively regulated. (3) Electric cars. Electric vehicles in the MECS, either as an energy storage unit, and can be as a distributed power supply. It can not only greatly reduce the amount of electricity generation and energy storage device system, but also can effectively alleviate the pressure of the power grid. The MECS Design Scheme CCHP. The turbine-direct combustion LiBr absorption unit reduces the waste heat boiler, standby boiler and related auxiliary system, and greatly reduces the system cost, operation cost and maintenance difficulty. This makes the system configuration is more reasonable, and has a broader market. Thus, in view of the campus, this paper will adopt the gas turbine-direct combustion LiBr absorption unit. Photovoltaic Diagram. The MECS contains an array of photovoltaic array, which receive solar energy to generate power. Photovoltaic power generation of electricity by distributor communication sent to the local load, excess electricity through the circuit to the electric car battery or feedback to power grid. 3rd International Conference on Materials Engineering, Manufacturing Technology and Control (ICMEMTC 2016) © 2016. The authors Published by Atlantis Press 648 Design Scheme. The MECS is connected to the power grid through distribution transformer. The distributed power supply system consists of photovoltaic, gas turbine and the corresponding configuration has generator, turbine-direct combustion LiBr absorption unit, the electric car. System with cooling load (including electric refrigeration load and the cooling load of LiBr refrigeration unit), heat load (including the heat load for heating and hot water supply), electricity load (including important pure electricity load, general pure electric load and electric refrigeration load). System of gas turbine and the turbine-direct combustion LiBr absorption unit constitute the CCHP system. Electric load can be supply by three directions: when the light is enough, it can be supplied by photovoltaic system, excess electricity can be transported to electric vehicles or power grid; when light is insufficient, it can be supplied by both the MECS and the power grid, which ensures the reliability of power supply. Electric cars can be either as an energy storage unit, and can be as a distributed power supply. For the above MECS, this paper describes its energy flow relations which are shown in figure 1.