Study On The System Of Liquid Dehumidification Based On Independent Temperature-humidity Control Technology

Possession quantity of per capita energy is low in China.With the development of life level and the decrease of the outdoor environment quality,people are paying more and more attention to indoor environment.Air conditioning using is becoming increasingly popular,traditional air conditioning system also exposes some problems and shortcomings.Therefore,based on independent control of temperature and humidity of liquid desiccant air conditioning system came into being.Currently,there are many scholars researching the system applied in high humidity areas,but the research in hot summer and cold winter area,which is high population,urgent air conditioning demand and more energy consumption,is less.In this paper,on the basis of independent control of temperature and humidity technology and dehumidification technology,the main research areas are the following:(1)Summarizing the deficiencies of conventional air conditioning systems and analyzing the applied features?the characteristics and energy saving effect of liquid desiccant air conditioning system based on independent control of temperature and humidity air conditioning system.Design dehumidification system for this topic based on predecessors' research.(2)Fluent numerical simulation software will be used to set up the dehumidifier packed tower physical model and mathematical model of the system.Then using volume-average method and the porous medium model.I select six sets of data from the paper of the reference and simulate them.And the results were compared with experimental results,I found between the error rate is within 20%.This indicates simulation results are basically consistent with the experimental ones and the model I established has a high reliability.(3)Summer in hot summer and cold winter areas outside air parameters will be analyzed,and using the established model simulates the outdoor parameter of 12 cities in the area.The results show liquid desiccant air conditioning system dehumidifying efficiency is about 60%in this region.And in some areas it up to 62%.This indicates the system has a good applied prospect in hot summer and cold winter area.(4)In this paper,a commercial building in Nanjing will be used for example.The paper made a economy comparative analysis of independent control of temperature and humidity of liquid desiccant air conditioning system and conventional air conditioning system from the initial investment and operational energy.The results show liquid desiccant independent air system is less than conventional air conditioning systems 533900 yuan in the initial investment side.The operational energy of liquid desiccant independent air system is less than conventional air conditioning system 57321.6kWh.And it saves energy about 16.43%.2.5years will be used to re recycling the extra investment funds.This also indicates the system has a good applied prospect in hot summer and cold winter area.In China,there are many cities which are in hot summer and cold winter area,and they have dense population.Due to global warming,the days of temperature in this area above 30? in summer increase.38?-39? is common.And the insulation performance of the building envelope is poor in this area.Therefore,demanding for air conditioning is high in these areas.Due to the lack of standardized management and scientific guidance,it leads to air conditioning energy consumption increases.As simulation and engineering case study finished,it indicates independent control of temperature and humidity of liquid desiccant air conditioning system performs good in energy saving side.This paper in order to improve the indoor living environment in these areas,reduce air conditioning energy consumption and provide information to further research.