The Research On Cooling And Heating System Of New Distributed Energy In Cold Region

Although natural resources are rich and geographical advantages are unique in our country,but the per possession resources are very low,such as the per amount of oil and gas resources is 1/15 of the world level.In the world's proven reserves of coal,oil and natural gas,China located in the third,13th and 14th respectively,and a mount of resource reserves have not been proven in China.From the point of energy utilization way,central heating and air handing unit cooling are the main way,not only energy efficiency is low,but also environment pollution is serious,90%of SO2 and NO,come from the combustion of coal.Therefore a new way of energy utilization is very important,and this paper designed a new energy utilization way of combining solar energy and traditional distributed energy.It is very significance for the research on energy system optimization matching in cold region.Based on the system energy flow,describes the system form and system principle,mainly including“gas turbine combined with compressor”,“solar energy system combined with distributed energy”and“gas turbine combined with waste heat boiler".Through the method of net present value and payback period,selected the solar collector area.Through the energy analysis and exergy analysis,ensured the thermodynamic performance of the system.Based on the energy saving rate,determined the relation of system total energy efficiency and energy saving rate.Simulated the designed system by TRNSYS,and simulated different equipment of waste heat boiler,heat exchanger,solar collectors,heat storage water tank,circulating water pump,refrigeration unit and auxiliary heater,analyze their running condition and established their physical model.And established the mathematical model of solar collector,gas turbine,refrigeration units and waste heat boiler,as the premise condition for TRNSYS simulation.Through establishing physical model in TRNSYS,simulated the working status of the equipment at the second condition,mainly including the outlet temperature of the heat exchanger,solar collector and heat storage water tank,circulating water pump,refrigeration units,and the outlet gas temperature of waste heat boiler,thus analyze the system's working status at second condition whether can meet the requirements of the actual heating and cooling load for users Simulated waste heat boil in complementary combustion and not complementary combustion by Fluent.This paper also established the physical model and mathematical model of waste heat boiler,simulated and analyze the temperature field and velocity field in the furnace,and captured the Z=1 and Y= 1.75 surfaces,studied the different plane of the temperature and velocity distribution in the furnace.By studying the selected complementary combustion boiler,as the waste heat recovery unit of the system.Then simulated the new distributed energy system's application in the actual construction,selected benchmark building in Shenyang area and established the physical model and equations.Then used the per unit time heating and cooling capacity of the simulation results in TRNSYS,to simulate the temperature and loading all the year round of three different rooms in building.From the results in this paper,the designed system can completely meet the demand of practical application.From electric load,steam load and sensitivity analysis,maked a plan and project analysis to industrial park in Shenyang.Summarized and prospected the whole paper,and changed the traditional pattern of centralized power through the optimization design,to achieve energy cascade utilization.And used a variety of energy conversion and storage devices so that maximize the energy using.Therefore,this paper sets up a new type of power system,and provides a new development model for the energy supply in the future in China.