Influence of Indoor Thermal Environment on Thermal Comfort of Human Body

Analyses the thermal environment parameters from physiological aspect and from psychological aspect respectively. Introduces the conception of thermal comfort of human body from heat balance aspect. Presents some measures to improve indoor thermal environment and advance thermal comfort of human body. Analyses the influence of indoor thermal environment on thermal comfort of human body and some questions on the aspect of this research, also puts forward some advices.     

Operational Parameters of Hybrid Radiant Cooling Floor and Displacement Ventilation Air Conditioning System

The simulation model of hybrid radiant cooling floor and displacement ventilation air conditioning system was built and analyzed by software EnergyPlus. By comparing the simulation results and experimental data, it is shown that the simulated indoor air temperature and cooling capacity provided by radiant floor was ±7% deviated from the experimental data. Based on the model, with the change of supply air parameters or supply water parameters, the cooling capacity provided by radiant floor and displacement ventilation, surface temperature of radiant floor, indoor air average temperature, AUST temperature were obtained. Combined with the indoor thermal comfort model, when indoor thermal comfort index PMV varied between -0.5 and 0.5, the recommended supply air and supply water parameters were obtained to provide reference for engineering design and application.     

冬季室内热环境与被褥微气候的匹配

冬季睡眠状态下,室内热环境与被褥微气候分别对人体头部和被覆躯体的热感觉造成直接影响。为了分析两个热环境的匹配关系以满足睡眠人体的热舒适水平,实验在不同的室内温度下,调节被褥微气候温度,测试了受试者的皮肤温度,并记录了热感觉和热可接受水平。研究结果表明:睡眠状态下,相比于室内热环境,人体热感觉对被褥微气候更敏感;此外,通过分析室内热环境和被褥微气候分别与整体热感觉和整体不满意率的关系,得到了睡眠热环境舒适区间。     

Research on Comfort Index of Gan-Lan Dwellings in LongSheng Area of Guangxi Province,Guilin City

The research on architectures with ethnic characteristics increase both domestic and abroad, and one of the important objectives of which is to find whether there is good adaptability between the space and forms of architecture and area climatic conditions, In this paper, through the field measurement of parameters and meteorological data of stilt style architecture of the minorities in Guilin of Guangxi province and ordinary residential building, and using Design-Builder simulation software to model, conducting the CFD simulation, thermal environment inside the building and indoor temperatures of the whole year were obtained, then we calculated that thermal comfort index inside the building for the full year. Comparing the simulation results, we concluded that thermal environment inside the building and thermal comfort index of stilt style architecture significantly outperformed the ordinary ones. Stilt style architectures are more suitable to the climates in Guangxi province. At present, the research of stilt style architecture is still at an early age, and this paper can provide basis for the research on the energy saving technology of stilt style architecture.     

Research on Classroom Thermal Environment during the Summer in Chongqing

In this paper, the university teaching buildings in Chongqing are taken as study object, and the indoor thermal environment of classroom is studied with the ways of investigation and testing, in which the indoor thermal environment of classroom is characterized by two aspects: personal and impersonal. The accepted thermal environment range of the classroom in summer is obtained. The difference between predicted thermal sensation and measured one as well as the influence of air velocity on thermal sensation are analyzed. Some measures to improve indoor thermal quality are proposed.     

居住建筑室内热环境低能耗营造的多目标设计方法

人居环境改善涉及重大民生问题,节能减排是国家重大战略。因此,有必要寻求合理的居住建筑设计方法,使设计方案既满足居民的室内热舒适需求又能降低建筑能耗。基于多目标遗传优化算法,建立能够对建筑设计方案进行优化、实现增加室内热舒适时间比例的同时降低建筑全年冷热负荷的居住建筑设计双目标优化模型。最后,以重庆典型户型为实例进行优化,优化后的设计方案建筑全年冷热负荷降低了47.74%,室内热舒适时间比例提高了3.94%,验证了模型的可行性和准确性。     

Indoor Thermal Environment for Green Roof

Roof planting is widely recognized as a ecological thermal insulation for roof. A lightweight green roof in climatic conditions of shanghai was investigated as a case study by applying PMV index to calculate thermal comfort compared with that with traditional roof in air conditioning. It is found that the PMV value of green roof is 0.2 lower than that of traditional roof, while the fluctuating range of green roof was only 1/4 of that of traditional roof. And the equivalent thermal insulating roof of green roof was obtained by computing. Furthermore, it is shown that green roof has lower interior surface temperature than equivalent insulating roof in the condition of higher indoor temperature.     

Assessment of Indoor Thermal Comfort for Low Energy Consumption Buildings

A model for indoor thermal comfort assessment was investigated in this paper. By using this model, the indoor thermal comfort of low energy consumption buildingwith buried pipe system was evaluated. The result shows that the buried pipe ventilationcan improve indoor thermal comfort in hot climates.     

Fuzzy Comprehensive Evaluation of Human Thermal Comfort

The human thermal comfort is influenced by many factors, and it is fuzzy, so it is a kind of stochastic fuzzy variable. So the evaluation of human thermal comfort is fuzzy also. and the method assessing the human thermal comfort with fuzzy mathematics is reliable. The factor affecting the human thermal comfort is analysed and predigested. Based on the analysis above,the methodology of assessing the thermal comfort is presented. The methodology resolves the decision_making continuum, so it lightens uncertainty of traditional method. The simulation results are compared with the Predicted Mean Vote index, and they are in good agreement. The study shows that the methodology of assessing the thermal comfort is reliable,and it presents a new approach for studying the human thermal.     

Application of Index Evaluation Method: an Interior Integrated Evaluation to Business Halls of China Construction Bank in Shenzhen

From the view of clients and staffs of China Construction Bank in Shenzhen,through establishing comfort index by Likert scale,an integrated evaluation on the comfort of the business halls is carried out by questionnaire.It was shown that there were several factors affecting the interior design: for clients,the sense of comfort involved temperature,atmosphere quality,illumination,dimension of furniture and spaciousness etc.,but the staffs more cared for the crowded degree of indoor environment and the comfort of furniture.The research shows that the Methods of Index Evaluation are easy for handling and transverse comparison.     

南方建筑非透明围护结构热工与节能设计

如何兼顾冬夏两季建筑供暖空调负荷和能耗,保证室内热环境质量,确定最适宜的热工特性,是长期困扰中国南方建筑围护结构热工与节能设计的难点。通过对夏热冬冷和夏热冬暖地区建筑在采暖、空调与自然通风条件下动态热过程的分析,研究了这一地区围护结构热特性与能耗的制约关系,以及对室内热环境与建筑热稳定性的作用机理。在兼顾冬季保温与夏季隔热的情况下,将建筑全年能耗作为控制目标,从室内热环境质量、节能效果、围护结构的安全性、可靠性、经济性和实用性等角度评价目前所采用的围护结构节能技术存在的问题,提出一种适宜南方气候的建筑围护结构热特性指标及构造形式。     

Electre Multi-Attribute Evaluation Model to the Operating Performance of Air Conditioning Systems

An ELECTRE performance evaluation model was developed to outrank the different operating conditions of air conditioning systems. Five evaluation criteria covers total energy consumption, thermal comfort PMV and PPD, indoor air quality indices such as CO2 concentration and TVOC concentration. The performance under seven different operating conditions was outranked on the TRNSYS (transient system) simulation platform. Three assignment alternatives of weight coefficients were selected to calculate the relevant credibility scores respectively. The results indicate that the proposed evaluation model can outrank the different operating conditions and select the optimum one, Moreover different weight assignments have little influence on the outranking scores. Further investigation should focus on the more evaluating criteria such as control performance and others in the comprehensive evaluation of operating conditions.     

Seasonal Characteristics of Thermal Environment in Urban Public Space of the Urban in Hot-summer and Cold-winter Region

Thermal environment in urban public space is considered as an important factor affecting thermal comfort of human beings. In the whole year, thermal environment in public space of the city in hot-summer and cold-winter zone changes dramatically, which has an effect on human thermal comfort. In this study, three typical public spaces including street, park and square of Changsha were selected for a long-term experiment of thermal environment. Based on the analysis of four significant thermal environment parameters-air temperature, relative humidity, global temperature and wind speed, seasonal characteristics of thermal environment in urban public space were obtained. The results show that the characteristics of urban thermal environment are determined by natural climate, while the physical structure of a city has essential impact on the changes of local outdoor thermal environment. Affected by plants (trees) and water (Xiangjiang river) air temperature of the street along the street is much lower, relative humidity is higher and solar radiation is weaker in most of the year. Compared to the street along the river, air temperature of the square is higher and solar radiation is stronger.     

Design of Rural Residence Based on Thermal Comfort: A Case Study of Chengdu Area

With the improvement of living standards, peasants have attached increasing attention to quality of living environment, indoor thermal comfort of rural residence has become a functional need of new countryside residence. Chengdu is a foggy area with shorter sunshine hours, humid air, more foggy but fewer windy days, so local residence is likely to be muggy, which influences comfort of residents seriously. According to relevant researches, most rural residences in Chengdu use only natural ventilation, and the indoor thermal comfort is poor. In view of this, this paper tried to improve indoor thermal comfort and quality of living environment from the perspective of residence functional design.     

Condition monitoring and mistake precaution system for power strap based on photoelectric detection

Thermal environment is analyzed based on the field measurements of indoor and outdoor temperature and humidity of a typical Tibetan traditional dwelling in a village of Gannan Tibetan Autonomous Prefecture, Gansu province in winter and summer. Results show that the combination of local factors such as history, geography, climate, unique local-style dwelling houses building structure and monomer structure. The structure (envelope)of traditional Tibetan dwelling has a good thermal performance. Passive methods should be used to build thermal environment constructions. Further improvement for indoor thermal comfort conditions through comprehensive and energy-saving heating are needed.     

A GENERALIZED WEBER-FECHNER LAW

This paper presents a generalized Weber-Feehner's Law.It shows that this law can be used in assessing lighting,acoustical andthermal environment of building.The room articulation funetion,the li-ghting clarity funtion and the thermal comfort function are derived fromthis law.The ealeulated results of these funetions are coincident withthe experimental data obtained by some famous researchers in the world.It can be thought to be a universal law.     

Experimental Comparison of Low-temperature Hydraulic Heating Floor and Heat Pump Air-conditioning

In this paper the low-temperature hydraulic floor heating system of a residence in Chongqing was tested. The influence of this system and the heat pump air conditioning system on indoor thermal comfort and operation cost was analyzed and compared. The effect of heat dissipation by radiation and convention of the floor was analyzed. It shows the feasibility and advantage of floor heating system in Yangtse River Region.     

Ventilation regulating methods adapting by climate for residential housing

To study the climatic control strategies of the residential building indoor acceptable thermal environment, firstly, based on adaptive model, integrated indoor activities, clothes and spot investigation on air velocity of residential building, this paper calculates an acceptable temperature range. Secondly, through state-space techniques, common passive regulating technologies in residential building have been simulated, including different ventilation rates and divided-period setting ventilation effect on indoor temperature. Meanwhile, monthly regulating methods for ventilation have been proposed. Thirdly, through ventilation technology, effective regulating zone of outdoor climate parameters have been analyzed, which is combined with hythergraph of outdoor temperature, humidity, solar radiation and air velocity. Taking the characteristics of the human thermal comfort adaptability into consideration, the energy-saving potential of the study results is also analyzed.     

巴渝地区夯土民居室内热环境

传统民居的传统生态建造经验与价值已得到广泛认可,巴渝地区因特殊的地形与气候,传统民居在热环境的营造上有自身的特点。以重庆江津区龙塘村夯土民居为研究对象,以实地测量的冬季室内热工参数为基础,运用软件模拟分析,对民居全年室内热环境进行评价,发现夯土墙对改善夏季热环境更为有利,夯土民居冬季室内热环境远比夏季差;民居建筑中阁楼空间在调节室内热环境方面作用显著,具有冬季保温,夏季隔热的作用。     

New Trends of Material Design in Indoor Environment

Material is the substance foundation and carrier of indoor environment, and it is the premise and guarantee to realize the excellent indoor environment. It contains physical and sensory properties. In recent years, the material design in indoor environment tends to be more rational, it not only pursues the external performance of material, but also pays more attention to the health and emotional of residents on the basis of scientific and rational use of its properties. This paper based on some scientific methods of literature study, field survey and case study combs the new trends of material design and analyses specific performance and application of materials in development. It is expected that the research can enrich the theory of contemporary material design and provide valuable reference for future material and interior environment design.