Study On The Design Strategy Of The Combined Luminous&Thermal Environment In Natural Ventilation Building Considering Rhythm Synchronization

The current indoor environment building method based on artificial regulation technologies is facing more and more challenges.This bottleneck derives from the limitations of the reductionism method in dealing with complexity issues.The solving way is to learn from the systematology method and search for the law of harmonious coexistence of the system composed of the human body,architecture and nature.Inspired by the theory of"natural-human correspondence"in traditional Chinese medicine,the"rhythmic resonance"hypothesis and the architectural climate design method,this study gradually recognized that the rhythm synchronization between the human body,architecture and nature is one of the basic principle of the system's harmonious symbiosis.Therefore,this study first discusses the basic issues?design goals and technical solutions?of the indoor environment building method that considers rhythm synchronization,and proposes the concept of rhythm-synchronized buildings.Then,a natural lighting and free-running room temperature design decision-making-aid tools based on rhythm synchronization needs is developed.Finally,under the guidance of the aforementioned building concept,design principles and objectives,an architectural design,construction,and operation practices are carried out based on the proposed design decision-making-aid tools.The specific research content and results are as follows:Firstly,based on the rhythm synchronization principle,the concept of rhythm-synchronized building is proposed:Using localized architectural climate design strategies and passive regulation low-technologies to take advantage of local climate potential,and create a well-being indoor enrivonment,which could synchronize the circadian rhythm of the users to local natural environment cycle,and also considering the other healthy and comfort needs of the human body.Following this concept,considering the balance between visual needs,photobiological needs,and thermal comfort needs,the design principles and design goals are proposed:in the day,using natural lighting to meet the photobiological needs;in the night,using dim background lighting to meet the basic traffic visual needs,and personalized lighting to meet the visual needs;Using building climate response?daylighting&free-running temperature?to meet the needs of adaptive thermal comfort and photobiology.In addition,considering the balance between natural energy supply and rhythm-synchronized building demand,a design principle for an efficient building using natural energy is proposed:using an integrated design to achieve an efficient building system,based on the categories of thermal regulation function of building components on the building energy flow path,Guiding by this design principle,there are three design goals:the total heat balance,the dynamic heat balance,and the matchting of energy quality.Under this design principle and design goals,a uniform radiation regulation building model is proposed,and its application potential analysis showed that the proposed building model could using the natural energies to satisfy the demand of a rhythm-sychronizaed building under current buildings thermal design codes in various climate zones across China.Secondly,this study developed a non-visual effect evaluation method based on the current lighting design parameters.The non-visual effects and its'photobiological risks of the daylighting design ratings were analyzed.The results show that,in the fine visual work room with level ? and level ?,the photobiological needs of the user can be fully met.Although the average non-visual effect of level ? can sometimes reach 100%,the non-visual effect of the position wich covered by furniture or deep in the room,cannot fully reach 100%during the day.Although the average non-visual effect of level ? also can sometimes be 100%,the main rooms of houses adopt this level may be harmful to the elderly people who long-stay in indoor,considering the elderly's ciracadian system function is weak,and the eye's light transmission performance is reduced,which required a higher exposure intensity.the ? level is mainly for spaces with short stays,considering the delay characteristics of non-visual exposure,it's photobiological risks can be ignored.Thirdly,this study addresses the problem of the lack of free-running temperature prediction tools for the early design stage.Based on three building thermal characteristics indicators(total heat gain G_to,total heat loss coefficient K_to,total effective heat capacity S_to)and its corresponding quasi-steady-state heat transfer algorithm,a quasi-steady-state building heat transfer model is developed.Accordting to the indoor air heat balance equation,the free-running temperature prediction formula is derived.Based on the periodic penetration formula,an effective heat capacity determination method is proposed,which makes it possible to accurately predict the hourly free-running temperature in the early design stage.The simulation verification results based on EnergyPlus and the experimental verification results based on measured data show that the formula can accurately predict the fluctuation trend of free-running temperature,and the absolute errors of the hourly predicted temperature are 3.0?and 1.8?on average.Based on the developed quasi-steady-state building heat transfer model,this dissertation aimed at the problem of lack of thermal parameter decision tools to achieve the design goals of free-running temperature.Through the sensitivity analysis method,it obtained the functional relationship between the free-running temperature design index(the daily average temperature difference between indoor and outdoor?T_io and the daily range ratio between indoor and outdoor?_io)and three building thermal characteristics indicators(total heat gain G_to,total heat loss coefficient K_to,total effective heat capacity S_to).Then the principles of building thermal design that creat a free-running room temperature is revealed,and a decision-making-aid graph of thermal characteristics index based on the design index of free-running temperature is proposed.The test results of two application case show that the decision chart can accurately design the thermal characteristic indexesFinally,under the guidance of the proposed building concept,design principles and design goals,technology integration strategies and uniform radiation building model,this dissertation uses the proposed design index and decision-making tools,to carry out a construction practice,discuss the design and construction points of the building process,and carry out the performance experiments of luminous and thermal environment.The results show that,in the heating season and the cooling season,the actual performance of the luminous and thermal environment can meet the rhythm-synchronizated design goals,and the uniform radiation system significantly improves the free-runing temperature in heating season and the utilization efficiency of natural energies.