Architectural design for residential thermal regim -

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Architectural design for residential thermal regime of - Analysis of Beijing residential summer room temperature (2)

Impacts of architectural design on thermal performances of residential buildings

<! - # BeginEditable residential room temperature, the measured data, through analysis and comparison of different rooms throughout the test period, differences in temperature curve, quantitative analysis of the architectural design of the room floor to determine the location, building structure and building envelope layout and other factors on residential indoor thermal conditions impact. The results show that: well-structured building envelope insulation properties and a reasonable construction layout is the key to improving the status of residential heat. Keywords status of indoor thermal state of the quantitative impact of architectural design Abstract By comparing indoor temperature patterns measured in different residences without air conditioners in Beijing in the summer of 1999, investigates to what extent architectural design influences indoor climates of residential buildings and identifies the relative level of importance for each decision in architectural design which include the number of floor the room locates, insulation of external walls and roofs, window shading, location of fenestration and floor plans. Results show that blockage of solar radiation by insulation of external walls and roofs, by window shading and by proper location of fenestration can substantially improve indoor thermal environment. Results also indicate that good natural ventilation by proper design of floor plans also plays and important role in improving thermal performances of residential buildings. Keywords residential building, indoor thermal conditions, architectural design, quantification, influence

<! - # BeginEditable 0 Introduction [1] According to the measured data at room temperature of existing residential changes of summer indoor thermal conditions, it is also found to describe the characteristics of indoor thermal conditions parameters such as average temperature, temperature fluctuation and delay time in which the floor with the room location, building envelope structure and layout of different architectural changes. Therefore, the residential building design to a large extent determined, the amount of external disturbance influence on indoor thermal conditions of size, which affects the quality of indoor thermal conditions. On the architectural design of each disturbance caused by changes in the amount of influence will help architects and engineers to understand the flexibility to apply this knowledge in residential building design process, thereby minimizing energy consumption conditions, to ensure that residential indoor thermal conditions to meet the body's thermal comfort requirements. The existing research largely confined to theoretical analysis or simulation of laboratory tests under specific conditions analysis, the actual situation of the measured heat of residential and rare, due to diverse forms of the building, and each interference rate on residential indoor thermal conditions but also by residents of the regulation and control of live acts, so the actual residence is necessary to understand the variation of indoor thermal conditions. Still some typical houses of residents, according to the measured data at room temperature, through analysis and comparison of different rooms throughout the test period, the difference curve at room temperature, this quantitative analysis of the various factors in the architectural design of residential change on the actual impact of indoor thermal conditions change and the relative size of impact, and further understanding of the residential architectural design of the physical mechanism of indoor thermal conditions. 1 Analysis compared with the characteristic parameters of the indoor thermal conditions (average temperature, temperature fluctuation and delay time), the room temperature continuous-time curve can be more intuitive,[link widoczny dla zalogowanych], more detailed to reflect changes in domestic law of indoor thermal conditions, so the entire test period, by analyzing and comparing the room temperature curve of different architectural design can be analyzed quantitatively the changes of each factor the amount of disturbance caused by the situation on the domestic hot impact of the change. The building design factors on the residential status of the role of indoor thermal interaction, interaction constraints, and therefore the study of changes in a construction factors, changes in the status of residential indoor thermal effects should be selected only for the Analysis of construction factors change, and other factors in keeping the room as a study. This study by analyzing and comparing changes in the temperature difference between different rooms, you can determine the changes of the residential construction factors of indoor thermal conditions change, thereby neglecting other building factors. According to architectural design features, this paper is to discuss the changes in the residential indoor thermal conditions are the main architectural elements: the room in which the floor location, building structure and building envelope layout and so on. 2 floors of the room location residential indoor thermal conditions of the variation found: Because of different indoor and outdoor heat exchange, top-level room, the room and the middle layer the bottom of the distribution of the average room temperature showed significant differences, the top than the bottom of the room the room temperature average high 3 ~ 4 ℃. This is because the top of the room through the roof absorbs a large amount of solar radiation heat gain, while the underlying disturbance and the disturbance outside the room under some heat gain can be spread through the ground soil. This section is adopted throughout the test period (July 15-August 9) at room temperature within a continuous curve, further analysis of the top, the middle layer and the underlying changes in room temperature conditions of the selected object as the bottom, the middle layer and All the top to the south room, building envelope insulation structure measures are not taken. Thus, in Figure 1 when the temperature of each room by the same time, the same floor of the room temperature average. On the other hand, [1] study shows: ventilation rate is high, the room temperature on the change of the natural ventilation decisions; indoor and outdoor air in the case of smaller, mainly by the temperature change in the amount of additional disturbance role in the decision, this time, the daily temperature amplitude is less than the basic 3 ℃, the delay time at room temperature is greater than 6h. Therefore, the choice of subjects should also make the room temperature is less than the daily volatility of 3 ℃, the delay time is greater than room temperature, 6h, to reflect changes in the location of the room in which floor indoor thermal conditions change their main influence. Figure 1 Test of the different floors of the room temperature curve Figure 1 shows: top, middle layer and the bottom of the room temperature curve of the fundamental equality of each other, that is compared to the middle floor of the room, the underlying and each time the top of the room temperature is almost the same rate decreased or increased, the entire top floor of the room temperature during the test than the middle layer of the high average of 1.7 ℃, while the bottom is lower than the middle layer of 1.6 ℃. The above analysis shows: changes in the location of the room floor which led to a role in the amount of disturbance in the room size changes, thus changing the room's indoor thermal conditions. And the top of the room temperature changes show that the solar radiation level influence on the importance of indoor thermal conditions, therefore, should enhance the residential roofing insulation treatment.

3 external structure design the above analysis illustrates the solar radiation on summer indoor thermal conditions affect domestic importance, therefore, to improve residential indoor thermal conditions, should be outside the design envelope to take appropriate measures, including exterior walls and roof insulation separated hot, outside the window shade and a reasonable set of windows facing. 3.1 external wall and roof insulation room floor location of the different indoor thermal conditions led to changes in external interference, and the room's heat transfer process is ultimately surrounded by indoor air and building retaining the heat exchange surface within the structure to complete, so even if the foreign interference in the same role, the building envelope on the amount of disturbance can lead to different responses of indoor thermal conditions change. The increase of the external walls and roof thermal resistance can be reduced by the amount of outside interference envelope heat transfer to the indoor air. Figure 2 show the top two to the southwest room temperature throughout the test period the situation changes. Subjects with different floors of the room consistent with the principles established, the natural ventilation of the two room temperature changes of less the same, but the room A to meet the current standards in energy saving house, wall and roof insulation, and room B is traditional brick homes. Figure 2 test of the insulation and non-insulation of the room temperature curve in Figure 2 thermal insulation and non-basic differences between the room temperature change is similar to the top and middle layer between the room temperature changes, so , wall insulation, roof insulation, especially the effect of solar radiation that can reduce the heat on the impact of residential indoor thermal conditions, thereby reducing the overall room temperature and room temperature by the time the average size. Compared with non-heat the room, holding room throughout the test period, the lower temperature range of maximum and average are basically the same, respectively, 1.1 ℃ and 1.0 ℃. 3.2 good shade outside the window shade facilities may effectively control access to the interior of the solar radiant heat, thus changing the room's temperature trends and, therefore, affect the position change of the room floor is similar to shade windows also contribute to indoor thermal conditions that affect the room outside the disturbance variable

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