Simulation And Control On Microturbine And Air-condition Of Combined Cooling, Heating, And Power System

With the rapid economic development, continued population increases, rising living standards, energy consumption increasing rapidly, the global energy crisis and serious environmental pollution become more and more serious .Therefore ,it is fairly essential to change of energy use patterns to improve efficiency of energy use and reduce environmental pollution. Howerver, the traditional energy supply system is a centralized energy supply system which is composed of big machines and large power net. This energy system uses the fossil fuel as the input energy, so there are many problems: a single product, poor security; more serious air pollution problem; Electricity demand is over supply and the slow pace of the power net's construction is not in harmony with the rapid development of society. This requires the development of new energy supply models to compensate the lack of the centralized energy supply system. distributed energy supply system of combined cooling heating and power (CCHP) is built on the basis of step utilization of energy, And it is Multi-connected energy supply systems that power, refrigeration, heating process is integrative. CCHP has many advantages: high efficiency, diversification, convenience, environmental protection, economy, and so on.So CCHP can become a useful supplement for the traditional model.Lots of domestic and foreign literature has done a mass of research work on CCHP systems, including analysis of the system thermal economy, comprehensive expounding of system performance ect. System simulation research has achieved fairly good results too. Micro gas turbine and air conditioning are the core components of CCHP. And they have very good development prospects, so theoretical research and technology application on both is very concerned about the issue at present; this issue takes it as starting point that the aim is to better achieve their effect of energy saving, explore their dynamic performance and stability. Both are simulated and controled in this issue.And the course of the study combines the advantages of solar energy and biogas.Basing on previous studies and according to the relevant theories of system analysis and integration, thermal physics, fuzzy control, modeling and simulation ect, this paper take Simulink as a platform to complete the following major work:(1) The paper advanced an idea that extraction gas from the gas pipeline between the combustion chamber and turbine entered the steam generator.Taking the microturbine as the disquisitive object,the paper has been established the mathematical models of each physical part of the microturbine with extraction gas .According to the diversification of the turbine load rate and extraction gas rate,the microturbine with extraction gas operation at off-design condition has been simulated with simulink.(2) Taking the extraction gas microturbine model advanced at the fore as the control object, the aim is to effectively utilize energy and increase the stability of the system.The paper has designed a fuzzy adaptive PID controller .Based on Simulink, the simulation controlling is established for the model.The simulation results show that the system gains favorable control effect and the design proved to be reasonable.(3) This paper tries to apply the biogas to the microturbine designed to burn natural gas.The paper briefly introduces the microturbine dynamoelectric system. Taking the microturbine as the disquisitive object , the mathematical model of each physical part of the biogas microturbine has been established by the modular modeling method.Under the different air-fuel ratio designed, the proportion of gas chemical component from firebox exit has been calculated .Whereafter,the simulation model of the biogas microturbine is built with simulink, and the microturbine biogas power generation at off-design condition is simulated with simulink.(4) The paper tries to apply the solar energy and biogas that is cleanly and reproducible to the microturbine.the dynamoelectric model of comprehensive using energy has been designed.Using numerical simulation method,the basal mathematical model of the model has been established and the simulation calculation of the model is done under the different solar irradiance with simulink.These simulation results can primely reflect the run characteristics of microturbine Using solar energy combined with biogas.The design proved to be reasonable.(5) This paper presents the idea that renewable energy—solar energy combined with biogas drives absorption refrigeration air-conditioning.The mathematical models of key performance parameters of the system have been established.According to three different running schemes,their respective simulation modules have been established and the simulation calculation of key performance parameters is done with Simulink.(6) Taking variable air volume air-conditioning system as the control object, basing on the fuzzy adaptive PID controller designed at the fore, the control of air-conditioned room temperature is simulated with Simulink and more satisfactory control results have been achieved.The results of this paper accords with fact and can primely reflect the run characteristics of microturbine and air conditioning.It has good control effect that fuzzy adaptive PID controller is used in microturbine and air-conditioning system. This paper provides an important method for research and applications of the microturbine ,air conditioning and CCHP system,for their autocontrol.This paper also provides a meaningful reference for renewable energy used in CCHP systems and for alleviating the crisis in fossil energy supply and for environmental protection.