Research On Application Of Energy Supply System For An Office Building In Beijing

With the changes in the consumption structure and resource proportion of the energy industry,the supply of energy has gradually shifted from the traditional sub-supply model to the joint supply model,and the energy supply range has also gradually shifted from large pipe network to small-scale area or buildings.For the existing buildings,it is of practical significance to optimize the energy supply system to achieve the best matching of energy so as to improve the comprehensive energy utilization rate.This paper takes the energy supply system of an office building as the research object,and calculates the cold,heat and electric load of the building by analyzing the typical energy-using rooms and energy-using features of the building.The calculation results are compared with the actual operation data and the original design load data contrast correction,the maximum cooling load 17647kw,the maximum heat load of 10725kw,the maximum electrical load of 18421 kw.According to the load calculation value,according to the result and the system does not match the existence of the proposed energy-based Internet system transformation program.In the process of rebuilding the scheme design,we comprehensively considered the geographical conditions,resource conditions and the characteristics of our own buildings in the area where the building was located.We set up a complex energy supply system with gas turbine as the prime mover,CCHP coupled with municipal heat network and power grid.In accordance with the different priorities and is divided into a storage system with scheme ?,as well as priority to meet the basic electrical load of the scheme ?.Through the comparison of two sets of plans,we can find that on the power generation capacity,the annual power generation of scheme ? is 50.37 million kWh,and that of scheme ?is 55.19 million kWh,which is obviously higher than scheme ?.On the other hand,the program a heat cooling capacity of 15,9738 GJ,6,4116 GJ residual heat heat;Option two cooling capacity of 15,2870 GJ,heat 65,139 GJ.After calculation,the comprehensive energy utilization rate of scheme ? is 81%,and the comprehensive energy utilization rate of scheme ? is 71%.By comparing with the original system,in terms of energy efficiency,the annual amount of standard coal for the original system was 46,401 tons,saving 18%on the basis of the first scheme and 16%on the second scheme.In economy,by comparing the annual operating costs,the program a saved 1.58 million yuan;the second scheme due to larger natural gas consumption,2.24 million yuan higher than the original system.By contrast,the system based on energy Internet has obvious advantages in energy saving compared with the original system.The system with added cold storage device utilizes the waste heat of power generation more effectively and improves the energy utilization ratio At the same time,it also makes it economically more advantageous,and reasonable use of energy storage system in the future energy planning will be the extra cold/heat access,delivery or sale to the surrounding buildings,...