Applied Mechanics and Materials Vols. 353-356

Abstract: Energyplus is used to discuss the impact of double skin façade (DSF) on building lights, heating and cooling energy consumption in daylighting control mode by simulating the building lights, heating and cooling energy consumption with different height of double skin façade (DSF) and different air cavity width .Thus the influence rules on the lights, heating and cooling energy in daylighting control mode can be found.

Abstract: The indoor temperature can be reduced by rationally using natural ventilation in summer. Based on the computational fluid dynamics software of AIRPAK, its convenient to simulate the air velocity field and temperature field of a house. Comparing software numerical simulation results with measured data, we conclude that under the maximum limit of window-wall ratio, the bigger the windows are, the greater the airflow effect is, the better the indoor ventilation effect is.

Abstract: The combination of reflecting cavity and cover layer makes it possible for a reflective radiant floor heating system to be characterized by uniform temperature field and low energy consumption. In this paper, the temperature distribution of a reflecting radiant floor heating system in an experimental chamber was tested under different heating conditions by use of copper constantan thermocouple; the temperature distribution of indoor workspace and floor surface was researched when water temperature was at 30°C, 40°C and 50°C and water flow at 0.24m3/h, 0.34m3/h and 0.44m3/h respectively; the temperature distribution on the surface of floors with three different layout patterns was compared. The results prove that a floor equipped with cover layer has a uniform temperature distribution on its surface. When water temperature is at 40°C, and water flow at 0.34m3/h, indoor workspace temperature remains at 20°C, and floor temperature can be controlled between 23°C and 26°C, satisfying peoples daily need for thermal comfort.

Abstract: Based on the theory of the room heat balance ,this paper discussed the 24 hours indoor temperature with work mode ,and concluded that indoor temperature changed in three stages:steady period, cooling period and warming period .By testing the actual indoor temperature of different heating ways with work mode and comparing the cooling process of theory results with field measurements after the temperature control valve closed ,concluded that the theory results and field measurements were basically the same and if the temperature control valve was closed less than ten hours in the daytime, the largest reduction of indoor temperature were about 2 ~ 3 °C, and it wont reduce people's comfort with work mode when indoor or outdoor temperature was high.

Abstract: The building interior light environment simulation, has been a difficulty in the traditional architectural design, Ecotect software can do a real-time analysis on building indoor light environment in the design stage of the building program, helping us to construction a green, energy-saving and comfortable modern architecture.

Abstract: With the increasing number of compound or deep-plan buildings, application and research on passive ventilation cooling system in construction is developing from single and directed way to multiple and indirect ways ,from not easy to control to easy to control, from simplicity to systematization. This paper summarizes four kinds of passive ventilation cooling types. Their techniques and adaptability are discussed .The disadvantage of natural ventilation cooling is pointed out. It proposed that indirect controllable ventilation cooling may be used in large depth, enclosed public buildings.

Abstract: To meet the heat metering reform, reduce the excessive heat and energy waste in the process of central heating , achieve the goal of " low consumption, low emissions, low pollution ", on the base of forced convection of air, the Terminal Heating Machine has been researched and developed such as the process coil as the core technology. As central heating terminal device, has high heat dissipating capacity, reliable performance, long service life, low cost, energy saving and environmental protection advantages, good operation effect, the indicators all meet the design requirements.

Abstract: The lighting system uses the illumination detection module composed of a photosensitive sensor and the capacity detection module made up of a battery capacity sensor to collect the analog signals, which are sent to the SCM for the further arithmetic processing after converted to the digital signals by the chip of ADC0809, and then the SCM chip controls the connection and disconnection of the electromagnetic relay switches in order to intelligently choose one of the three lighting methods, fiber optic lighting, solar cell power lighting or the city power lighting. It has the advantages of energy saving and environmental protection, which also has a good market prospect because of its excellent practical applicability.

Abstract: In order to satisfy human thermal comfort requirements (TCR_S), meanwhile, optimize air-conditioning energy property in use stage as design objective, a model of mapping from TCR_S to energy design factors (EDFs) of air-conditioning based on house of quality was presented. Through determining the elements of TCR_S, analyzing the relevance information between the TCR_S and energy property, and extracting EDFs of air-conditioning in use stage, the connection with TCR_S, air-conditioning energy characteristics and EDFs were illustrated by the house of quality. The importance degree of EDFs was calculated by using rough number and fuzzy mathematics, and so that the mapping from TCR_S to EDFs of air-conditioning was realized.

Abstract: The flexural-torsional buckling of equal-leg angle member under compression is analyzed and calculated. Based on General bending theory and the section properties of angle, the governing equations of the spatial buckling are presented and the formula of Wagner effect coefficient is deduced. The method can also be used for beam-columns with any type section, and the computational efficiency is much higher than numerical methods. The critical buckling loads of equal-leg angle members with different sizes are calculated and the column curves of critical load and slenderness ratio are plotted which will guide efficiently the actual engineering design.