(1) In line with the national policy of encouraging the development of distributed energy. In 2011, the four ministries and commissions jointly issued the Guiding Opinions on the Development of Distributed Natural Gas Energy, and in 2013, the National Development and Reform Commission issued the Interim Measures on the Management of Distributed Power Generation, advocating and encouraging the development of distributed energy in the country. It has also formulated the goal of promoting the use of distributed energy system in cities above designated size nationwide by 2020, with the installed capacity reaching 50 million kW, and initially realizing the industrialization of distributed energy equipment. The comprehensive energy utilization efficiency of the project is much higher than 70%, which fully meets the requirements of the distributed energy supply system advocated by the state.

(2) Meet the energy demand of new medical buildings such as the internal medicine building and the comprehensive office building of the hospital. The distributed regional energy supply scheme is beneficial to balance the energy demand of different functional areas and improve the security and economy of energy supply. According to the construction plan of the project, the users in the area are mainly medical and office. On the one hand, they have high requirements for the quality of indoor working environment, so they have relatively stable demand for cold, heat and electricity. On the other hand, it has high requirements for surrounding environment quality, so it needs to adopt clean and efficient energy technology. Therefore, according to the characteristics of the project, a distributed energy station with gas cooling, heating and electricity combined as the core and integrated with other available new energy technologies can be built. The power generated can not only supply the energy station for its own use, but also meet all the cooling and heating loads and part of the electricity load demands of the new medical buildings such as the medical building and the comprehensive office building.

(3) Reduce the emissions of CO2, SO2 and other polluting gases per unit of power generation, which is conducive to energy conservation and emission reduction. Due to the realization of the cascade utilization of the natural gas, the project of cold, heat, electricity co-generation highest efficiency can reach more than 75%, the efficiency of thermal power generation has greatly increased, and the urban natural gas pipeline is clean energy, the unit capacity of CO2, SO2 pollution emissions greatly reduced than that of coal-fired power, the "energy conservation and emission reduction" of the city is very good.

(1) To ensure safe energy supply as the primary premise, put energy supply security in the primary position of energy scheme design.

(2) Improve the comprehensive energy utilization efficiency of the system and reduce operating costs. The newly built distributed energy system will improve the comprehensive energy utilization efficiency of the system through a variety of energy utilization technologies such as the cascade utilization of natural gas, and the CONFIGURATION of SCR nitrogen removal system will further reduce the emission of nitrogen oxides, in line with the national policy requirements of energy conservation and environmental protection.

(3) Combining the architectural characteristics and the actual situation of the existing energy supply system, enhance the implementability. The design, construction and operation of the system are closely combined with the characteristics of building energy consumption, and provide high-quality energy supply services according to the changing law of regional cold and heat demand. It is combined with the overall project progress of the hospital building and the existing energy supply system, and makes full use of the existing resources of the hospital to ensure that the requirements of hospital construction and use are met.

2, load determination

The electric load of the project is over 700 kW, and the time under 1500 kW is over 6800 hours. Considering the high efficiency of the unit during operation, all the power generation is for self-use, and considering the factors such as electricity price and gas price, the mode of setting heat by electricity is adopted, and a 1.2MW gas internal combustion engine is adopted. It not only ensures the adjustable operation of the system, but also ensures the efficiency and stability of the system energy supply.