Performance Analysis Of Heating And Power System Basing On Three-staged Thermostatic Biogas Production

With the fluctuations in international oil prices, energy-saving emission reduction,environmental protection, increasing the voice of the international community in general is beginning to take biogas, countries have to take effective measures to encourage the development of biogas energy industry, biogas energy development and the effective International Energy use is increasingly becoming the focus of investment in the development of the field. However, biogas power generation of cool,heat and electricity can save the energy extremely by synthesis providing these energies to user. The advantage of small cogeneration is fossil fuel can be used in grades and be used up.The benefit of small generation comes from invest saving of electricity line construction and declining the loss of electricity transport as they can be constructed near the user. Therefore,biogas power generation gets a lot of countries support strongly.An energy supply system basing on three-staged thermostatic biogas is establishing depending on a principle of "parallel temperature and gradient energy utilization",disclosuring energy transformation.The research contents and achievements as follow:1 Energy supply system basing on three-staged thermostatic biogas has high thermodynamic property.The system has high efficiency of energy and exergy utilization.The energy utilization efficiency is 85.67%,and exergy utilization efficiency is 47.39%,the new system not only had high energy utilization efficiency, but also had improved the exergy utilization efficiency. So, on this point of view, the system of basing on three-staged thermostatic biogas is feasible.2 The new Energy supply system basing on three-staged thermostatic biogas,exhaust-heat of internal combustion engine generator set offer a steady environment for the biomass anaerobic digestion efficient,which making the low grade,unsteady bioenergy transit to the high grade methane chemical energy successfully. From the energy-utilization's point of view, it shows the Integrated Cascaded Utilization of Chemical and Physical Energy Principle sufficiently.3 Using the method of dynamic economic to appraise the entire system.The results showed that the net present value is 823 million yuan,the financial internal ratio of return is 28.9%,the benefit-cost ratio is 2.5,the time of capital return is 2.8 year.The promotion of this set of devices can generate good value for money and national economicbenefit,with good good prospect of application and extension.In the last section, we make the expectation of the development of the energy supply by three classes constant temperature biogas systems,and put forward five feasible advices for other scholars in this area and lawmakers.To keep pace with the developed countries,we should accelerate development of the energy supply system basing on three-staged thermostatic biogas industry and relevant equipments to make our country enter into the biogas power generation system era as soon as possible.On the other hand,the energy system supply basing on three-staged thermostatic biogas has the effect of the biogas power generation system era.