Multi-factor Analysis And Research On Energy Consumption Of Hospital Air-conditioning System In Shenyang

Because of its special function,hospital buildings have the characteristics of large energy consumption and many influencing factors compared with general public buildings.Based on this situation,how to effectively solve the problem of high energy consumption and increasing of hospital building air conditioning systems has become an important topic in the field of construction and energy applications.In order to find the key to energy saving in hospital air-conditioning system,this topic takes the influencing factors as the entry point,determines the impact degree of energy consumption,analyzes the impact level,determines the key level of the influencing factors,and formulates energy-saving means according to the key influencing factors.Firstly,the research on the energy consumption of hospitals in Shenyang area was carried out,and based on this research,the energy consumption simulation software DeST was used to refer to the relevant literature and research data to establish a “benchmark model”.The “benchmark model”is analyzed for thermal environment and load characteristics for subsequent research.Secondly,in order to facilitate the research,according to the characteristics of energy-influencing factors combined with common energy-saving methods,nine influencing factors are determined and divided into the following three categories: factors affecting the envelope structure(exterior wall insulation,external window type,architectural shading,window-wall Ratio,roof insulation),internal disturbance factors(occupant density,lighting power),air conditioning system control parameters(fresh air volume indicators,indoor temperature settings).Through the study of the impact of single factor change on energy consumption,the impact of single impact factors on air conditioning energy consumption and the energy conservation measures related to this factor were obtained.Considering the analysis of the single influencing factors,the correlation and mutual influence between the factors are neglected,and the influence level of each influencing factor on the energy consumption of the air conditioner cannot be accurately analyzed.Therefore,using the combination of orthogonal experiment and energy consumption software simulation,the significance degree of energy consumption influencing factors is analyzed,and the linear regression equation of annual air conditioning energy consumption index of hospital buildings is determined according to the main influencing factors.The analysis results of the influencing factors of the outpatient building are as follows: the fresh air volume index and the occupant density are particularly significant factors.The room temperature setting in winter is a significant factor.The summer room temperature setting,the exterior wall heat transfer coefficient,the external window shading coefficient,and the window-wall ratio are the general influencing factors;the analysis results of the influencing factors of the ward building are as follows: the occupant density and the fresh air volume index are particularly significant factors,the winter room temperature setting,the summer room temperature setting,the external wall heat transfer coefficient,the outer window sunshade coefficient,and the window-wall ratio are General influencing factors.Finally,a system energy-saving scheme was developed for the significant influencing factors and the characteristics of the hospital building.The exhaust air energy was recycled through the installation of the exhaust sensible heat recovery device.At the same time,the heat recovery amount was calculated and energy-saving analysis was carried out in consideration of the anti-condensation and frosting of the heat recovery device.According to the DeST simulation results,three applicable cold and heat source schemes were developed,and the economic and energy efficiency analysis was carried out in combination with the method of equivalent weight full load operation time.