Journal of Thermal Envelope and Building Science最新文献

A Systematic Approach for the Thermal Design Optimization of Building Envelopes 建筑围护结构热设计优化的系统方法

Journal of Thermal Envelope and Building Science Pub Date : 2005-10-01 DOI: 10.1177/1744259105056267

Mohammad S. Al-Homoud

引用次数: 39

Comparison of Thermal Conductivity Measurements of Building Insulation Materials under Various Operating Temperatures 不同工作温度下建筑保温材料导热系数测量的比较

Journal of Thermal Envelope and Building Science Pub Date : 2005-10-01 DOI: 10.1177/1744259105056291

A. Abdou, I. Budaiwi

{"title":"Comparison of Thermal Conductivity Measurements of Building Insulation Materials under Various Operating Temperatures","authors":"A. Abdou, I. Budaiwi","doi":"10.1177/1744259105056291","DOIUrl":"https://doi.org/10.1177/1744259105056291","url":null,"abstract":"In harsh climates, utilizing thermal insulation in the building envelope can substantially reduce the building thermal load and consequently its energy consumption. The performance of the thermal insulation material is mainly determined by its thermal conductivity (k), which is dependent on the material’s density, porosity, moisture content, and mean temperature difference. In practice, the k-value is normally evaluated at 24 C (i.e., k24) according to relevant ASTM standards. However, when placed in the building envelope, thermal insulation materials can be exposed to significant ambient temperature and humidity variations depending on the prevailing climatic conditions. The objective of this study is to assess and compare the effect of operating temperatures on the k-value of various insulation materials commonly used in the building envelope. The k-values for seven categories of insulation materials (i.e., fiberglass, wood wool, mineral wool, rock wool, polyethylene, polyurethane, and polystyrene) are measured at different mean temperatures using an automated heat flow meter. Some preliminary measurements are reported for the purpose of assessing the impact of k-value variation on envelope-induced cooling loads (Budaiwi et al. 2002). In this study, comprehensive measurements, comparison, and analyses of results are presented and discussed. These underline the k-value degree of sensitivity ((Δk/ΔC)/k24) of various insulation materials with rising operating temperature. This would allow designers to better evaluate the thermal performance of building envelopes leading to a more realistic thermal assessment and energy requirements of buildings.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121130577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 135

Thermal and Hygric Parameters of Carbon-fiber-reinforced Cement Composites after Thermal and Mechanical Loading 碳纤维增强水泥复合材料在热载荷和机械载荷作用下的热工参数

Journal of Thermal Envelope and Building Science Pub Date : 2005-10-01 DOI: 10.1177/1744259105057223

E. Mňahončáková, Roman Vejmelka, M. Jiřičková, R. Černý, P. Rovnaníková, P. Bayer

{"title":"Thermal and Hygric Parameters of Carbon-fiber-reinforced Cement Composites after Thermal and Mechanical Loading","authors":"E. Mňahončáková, Roman Vejmelka, M. Jiřičková, R. Černý, P. Rovnaníková, P. Bayer","doi":"10.1177/1744259105057223","DOIUrl":"https://doi.org/10.1177/1744259105057223","url":null,"abstract":"The basic thermal and hygric parameters of two different types of carbon-fiber-reinforced cement composites are analyzed in this article. The thermal conductivity, specific heat capacity, moisture diffusivity, and water vapor diffusion resistance factor are determined as functions of thermal load and tensile load applied before the measurement as well as of the combination of both types of load. The tensile load up to failure is found to be not a very significant factor for all material properties analyzed except for the moisture diffusivity. On the other hand, the thermal load is observed to result already at 600 C in considerable changes in all investigated thermal and hygric properties except for the specific heat capacity. The combinations of thermal and tensile loads lead to similar results as the effect of the thermal load alone so that the domination of the thermal load is apparent. This is supposed to be due to the positive effect of randomly distributed carbon fibers that can reduce the damage of the pore structure by the tensile stress. The resistance of the materials studied to high temperatures expressed by the change of hygric and thermal properties after thermal load is found to be positively affected by the application of the high alumina cement and in the case of the Portland cement-based composite also by using the autoclaving procedure in the production process.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116132692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Field Performance of Unvented Cathedralized (UC) Attics in the USA 美国无通气大教堂(UC)阁楼的现场性能

Journal of Thermal Envelope and Building Science Pub Date : 2005-10-01 DOI: 10.1177/1744259105057695

A. Rudd

{"title":"Field Performance of Unvented Cathedralized (UC) Attics in the USA","authors":"A. Rudd","doi":"10.1177/1744259105057695","DOIUrl":"https://doi.org/10.1177/1744259105057695","url":null,"abstract":"This article reports on field experience of unvented cathedralized (UC) attics in several environments in the United States. Traditionally, in some regions of the country, because of high water tables or the risk of flash flooding and lower cost, slab on grade construction is a preferred mode of construction. Mechanical equipment for air conditioning and distribution ducts are usually located in the attic spaces to conserve space. Conventional construction involves providing insulation on the floor of the attic and venting the attic space to the outside. The loss in efficiency in operation of the equipment and through duct leakage is no longer sustainable. Insulating the attic roof itself and blocking of ventilation to the outside transfers the air and thermal energy controls from the boundary with the living space to the plane of the roof. The air distribution systems now fall within conditioned space, which increases their efficiency, durability, and maintainability. While design criteria vary for different climatic regions, UC attics can be insulated in various ways and by using different vapor diffusion resistance strategies of the roof assemblies depending on the climate. The field data presented in this article include measured temperature of asphalt shingles, and thermal and moisture conditions of attic spaces and roof sheathing, as well as air leakage rates. This is of interest for determining probable roofing durability. A more complete understanding of the hygrothermal performance of the assemblies was gained through these measurements.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116348345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Energy Use of Buildings in Central Argentina 阿根廷中部建筑物的能源使用情况

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105051798

C. Filippín

{"title":"Energy Use of Buildings in Central Argentina","authors":"C. Filippín","doi":"10.1177/1744259105051798","DOIUrl":"https://doi.org/10.1177/1744259105051798","url":null,"abstract":"The present work analyzes the consumption of energy of three typologically and technologically different buildings, and its interaction with dimensional, morphological, and thermal indicators. The comparison of heat energy consumed by the conventional and the solar buildings (individual and apartments) allows the evaluation of the energy saved through the use of passive solar techniques and thermal envelopes. The study buildings are located in Santa Rosa (capital of the province of La Pampa) in Argentina. The latitudinal variation of degree days oscillates between 1300 and 1600 C to the north and the south, respectively. The results show the high correlation between the energy consumption and the energy loss through the building’s envelope. In buildings with conventional technology, the envelope (without insulation) reaches a G value of 4.13 W/m3 C, higher than the admissible maximum value stipulated by the N. IRAM 11604 for the study region. The technologically optimized construction through the use of an energy-efficient envelope, a carpentry with double glazing, and a collecting area of 12% with respect to the building’s useful area allowed an energy saving of around 75% during winter. The results confirm the large potential of the solar building design to reach significant levels of energy saving, and the comparison of solar and conventional buildings in terms of natural gas consumption confirms the magnitude of such a potential.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115959019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Letter From The Editor 编辑来信

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105055898

Mark Bomberg

{"title":"Letter From The Editor","authors":"Mark Bomberg","doi":"10.1177/1744259105055898","DOIUrl":"https://doi.org/10.1177/1744259105055898","url":null,"abstract":"This issue marks the 29th year of this Journal and its name-change to Journal of Building Physics. Having been first, a member of the Journal editorial board, then its associated editor, and finally its editor-in-chief for 23 years out of 28 years, it is at present my privilege to share with you a bit of the Journal history. The Journal was initiated in response to the energy crises of the 1970s as the Journal of Thermal Insulation. The readership was primarily industrial and the published material oscillated between technical and practical information e.g., news from Washington. By the end of the 1980s, people of North America forgot the energy conservation and the Journal readership started to shrink. Therefore, when the previous editor retired, I was given the job to rebuild the Journal and its readership. The only constraint imposed on me by the publisher was to retain part of the title so that there would be no need to obtain a new mailing permission from the US Post Office. For this reason, the Journal’s scope was changed and the name became Journal of Thermal Insulation and Building Envelope. As buildings were the main area of thermal considerations, this title was a step forward. Yet, thermal considerations alone were insufficient to address the building envelope as a system. In one of the popular articles, my colleague and I wrote:","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125540747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of the Mean Temperature Distribution Underneath a Slab-on-ground Structure 地面楼板结构下平均温度分布的估计

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105051796

J. Rantala

引用次数: 4

Utilizing Latent Building Thermal Mass for Dehumidification 利用建筑潜热进行除湿

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105051799

H. Abaza

{"title":"Utilizing Latent Building Thermal Mass for Dehumidification","authors":"H. Abaza","doi":"10.1177/1744259105051799","DOIUrl":"https://doi.org/10.1177/1744259105051799","url":null,"abstract":"Traditionally, attic space in buildings is perceived as a source of nuisance. In winter, moisture condensation on the attic ceiling encourages mildew growth. In summer, the heat buildup in the attic space increases the cooling load. However, if the attic is integrated in a holistic design and control strategy, it can function as a solar energy collector, a heat exchanger, and a desiccant. This research investigates energy saving by optimizing direct and indirect ventilation through the attic to precool buildings and to reduce humidity. The proposed energy saving strategies are examined in a double story house with an attic. The house is located in a moderate-humid climate. The built-up heat in the attic space and outside air ventilation is used to dry up roof construction materials during the day. When outside air cools down during the night but maintains high humidity, the indoor air is circulated through the attic space. The attic construction materials absorb moisture from the indoor air. Thus, indoor air loses both heat and moisture. EnergyPlus Simulation software was used to simulate these cooling and dehumidification strategies. The simulation results show a significant passive cooling and dehumidification in the building.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134210730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Physicochemical Characterization of a Hydrated Calcium Silicate Board Material 水合硅酸钙板材料的理化性质

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105053280

A. Hamilton, C. Hall

引用次数: 31

Interior Thermal Insulation System Based on Hydrophilic Mineral Wool 基于亲水性矿棉的室内保温系统

Journal of Thermal Envelope and Building Science Pub Date : 2005-07-01 DOI: 10.1177/1744259105051795

Z. Pavlík, Milena Jiřičková, J. Pavlík, R. Černý

引用次数: 14