Design And Application Of A New Type Of Air Conditioning System With Large Temperature Difference

Since 20 th Century,the energy problem has been a problem in our country and even the whole world,countries are actively looking for ways to solve this problem.Energy conservation has becoming the focus of the whole social research as the total energy consumption of 1/3 of building energy consumption,the study of its energy conservation has never stopped.This paper is based on the background of building energy efficiency,research on the air conditioning energy in building energy conservation.This paper aimed at the existing large flow of air conditioning operation,small temperature difference,combined with the indoor load north-south difference phenomenon,put forward on the cascade utilization of cold air conditioning chilled water,implemented the large temperature difference on air conditioning chilled water system to solve this problem,thus reducing the energy consumption of air conditioning.The main research contents were as follows: the performance impact of chilled water with large temperature difference on the water chiller,water pump,fan coil and other energy components;Put forward a variety of air conditioning water system optimization scheme to achieve the cascade utilization of chilled water quantity,through calculation and analysis of energy consumption of various projects,comparing with the existing air conditioning energy consumption.Optimized the optimum large temperature difference scheme.In the case of the use of large temperature difference,shaft power of chilled water pump was reduced greatly,Energy saving effect was obvious;but the temperature difference of chilled water became large,the terminal equipment,fan coil cooling capacity and dehumidifying capacity decreased with cooling water temperature increasing,reduced with the supply and return water temperature difference increasing;and for the water chiller,under the condition of constant water supply temperature,temperature difference increasing had little effect for the chiller energy consumption of refrigeration unit.A new type of air conditioning system with large temperature difference was designed and optimized,which made the backwater in the south to be the supply water to the north.implemented the cascade of the amount of the chilled water.Through the quantitative analysis of the energy consumption of the optimized system,the energy saving of the system could reach 18.48%? Combined with practical engineering calculation and analysis,a new type of air conditioning system with large temperature difference has energy saving effect and application prospect.