Optimal Design Of Distributed Combined Cooling,Heating And Power System

With the increasing shortage of energy supply, it has become a general issue across the world that how to utilize energy properly and promote the ratio of energy utilization. Recently, a new energy system-DES(Distributed energy system), with the features of effective, reliable, and environmental-friendly, stands out as the optimal choice. It cuts down the investment of transmission system and energy loss by using within the reach of consumers’community. Distributed Combined Cooling, heating and Power(CCHP) system, is the most clear, flexible and potential one in the DES family. As it combines the high-tech and new equipment together, it achieves a higher ratio of energy utilization, through cascaded utilization of the output energy. CCHP system can be an effective technical method, which will decrease the consumption of energy dramatically in a short period of time, and it performs well in promoting the ratio of energy utilization, reducing the pollution, popularizing the smart grid, enhancing the safety and upgrading the structure of utilizing energy.On the ground of the optimal design of the CCHP system, the paper suggests a way of improving this system by taking consumers’seasonal and hourly load demand into consideration. Firstly, the paper analyzes and designs the structure of the system by considering the features of the equipments and consumers’load demand; secondly, the paper builds the capacity model by categories and types based on the operation principles thirdly, the paper finds out the optimal solution to the models of the equipments’ capacities and the operating stratergies with better economy and efficient operation as the target, by using the method of Mixed Integer Programming(MIP), with considering the two principles:following the electric load, following the heat(cold) load. The paper also exemplifies the step and procedures by providing a real example. Finally, the paper analyzes the effect of the price of natural gas, electricity and the parameters on the equipments’capacities.