The Economy Research Of The Distributed Energy System

Energy and the environment is the important issues to face in the developing atpresent of the human, looking for the coordinate among the economicdevelopment,energy and environment, to implement the idea of sustainabledevelopment strategy has already become the consumption, the rapid development ofeconomy brings a direct result is the rapid growth of the demand for energy. Startingfrom the concrete national conditions of our country, reducing energy consumption, toimprove energy utilization and reduce environmental pollution have been as the energystrategy basis in the21stcentury in China. In this social context, Distributed EnergySystem (DES) this new way of energy utilization itself has the characteristics of energysaving, environmental protection, economy and reliability of power. It has a broadprospect in our country.DES is a kind of established on the basis of energy cascade utilization of integratedenergy system. It is dispersed around the user. First of all, using primary energy drivethe engine power supply. Then, through a variety of heat recycling equipment forrecycling waste heat. It according to the different needs of users at the scene of thedemand, to realize temperature corresponding energy. Let the transmission of each linkof the energy loss to a minimum. Ultimately, achieve higher energy efficiency, lowerenergy costs, higher energy supply security, and better environment performance.In this paper, introduces the basic concept, composition of equipment and basicprinciple of operation of the DES. Main system model for analysis of using natural gasas the fuel, for power generation equipment as the core of the different schemes of DESis analyzed and compared. Explain different systems of their respective work principleand application characteristics. At the same time, the separate production system andDES energy consumption model is established. On the basis of the first law of thethermodynamics and the second law of thermodynamics, after analysis and calculation,studied the energy saving condition of DES. At the same time, aim at the differentparameters change, has analyzed and compared the stage of refrigeration and heatingenergy saving rate. And the paper has also analyzed and compared the yong efficiency of the separate production system and DES, explaining the energy saving performanceof DES.This paper introduces the different principle of the configuration of DES, choosingdifferent economic indicators in order to analyzing its economy. For a building of ZuoQuan in Shan Xi province in north China, based on the different principles choosesdifferent system configuration schemes. Then compare the ability of supply and demandof each scheme, to calculate and analyzed the three aspects of investment, cost andrevenue. In the end, comparing all schemes we can know, choosing the scheme of gasturbine in the building as the superiority of DES power generation equipment. Thus itcan be seen, in north China, region choosing the DES scheme of gas turbine in theadvantages of large and medium-sized offices.