Journal articles: 'Overheating'

1

Newton, Alicia. "Overheating Antarctica." Nature Climate Change 1, no. 806 (May 29, 2008): 65. http://dx.doi.org/10.1038/climate.2008.51.

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Begka, Christina, Dominique Velin, and Michel H. Maillard. "Preventing Overheating." Inflammatory Bowel Diseases 22, no. 7 (July 2016): 1723–36. http://dx.doi.org/10.1097/mib.0000000000000838.

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Schlosshan, Dominik, Gunjan Aggarwal, Gita Mathur, Greg Cranney, and Robert Giles. "Amorous overheating?" Lancet 375, no. 9723 (April 2010): 1406. http://dx.doi.org/10.1016/s0140-6736(10)60137-7.

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4

Hewitt, Paul. "Overheating Motor." Physics Teacher 41, no. 5 (May 2003): 266–67. http://dx.doi.org/10.1119/1.1571259.

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Strauss, Kendra. "These Overheating Worlds." Annals of the Association of American Geographers 105, no. 2 (December 13, 2014): 342–50. http://dx.doi.org/10.1080/00045608.2014.973805.

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Dail, Steve. "Overheating Motor Demo." Physics Teacher 41, no. 8 (November 2003): 444. http://dx.doi.org/10.1119/1.1625198.

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7

Lyons, Randy. "Obesity and overheating." New Scientist 195, no. 2613 (July 2007): 22–23. http://dx.doi.org/10.1016/s0262-4079(07)61820-x.

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Pan, Jie Hua, Yong Zhi Zou, Yi Lin, and Jian Min Zeng. "An Investigation on the Overheating of A357 Aluminum Alloy." Advanced Materials Research 97-101 (March 2010): 1049–52. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1049.

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The structure and properties of A357 aluminum alloy with different second dendrite arm spacing (SDAS) in different situations of overheating were investigated. The results indicate that serious overheating characteristic structure takes on compound melting ball, crystal separating phase and overheating triangle section; The overheating level of A357 alloy raises with solution temperature increasing; The mechanical properties decrease with the overheating level increasing; The overheating temperature of casting increases as the SDAS decreases, the regression equations of the correlation between SDAS and overheating temperature is as follows: T = 575.46-0.213SDAS; Optimum solution temperature could be selected for A357 alloy with different SDAS depending on supercritical solution region proposed in this paper.

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Bharathidasan, S. "Automatic Transformer Cooling System Using PLC." Asian Journal of Electrical Sciences 8, no. 1 (February 5, 2019): 20–24. http://dx.doi.org/10.51983/ajes-2019.8.1.2337.

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In the previous 20 years transformer warming is a noteworthy issue in creating station, substation, circulation locale and different territories. The primary driver of overheating are Insulation overheating, Corona overheating, Liquid overheating, Arcing is overheating, screen testing overheating. Because of this it causes numerous issues, for example, Coil harm, bursting of transformer, Block of wind, and so forth. To lessen the warmth which is created from the transformer, to trip the transformer when it is in over warmth condition and the stop the absolute circuit for upkeep period a we have built up this task dependent on Programmable Logic Controller.

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10

Xing, Yuming, Tong Sun, and Xiaoan Hu. "Effect of Pre-creep Time on Creep Life of Nickel-based Single Crystal Superalloy CMSX-4." Journal of Physics: Conference Series 2252, no. 1 (April 1, 2022): 012008. http://dx.doi.org/10.1088/1742-6596/2252/1/012008.

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Abstract The effect of overheating with different time on creep life and strain curve of CMSX-4 nickel-based single crystal superalloy was studied. The overheating tests at different temperatures and stresses were carried out. The tests results showed that the duration of the second stage of creep would be reduced when the overheating happened at the beginning of the creep test. The deformation of the alloy quickly entered the third stage of creep, which obviously reduces the creep life and total strain of the material. When the overheating occurs in the second stage of creep, the rate of strain would increase after overheating and then the total creep life decreased. When the overheating was introduced at the beginning of the creep tests, the strain accumulation during the overheating was greater than that in the second stage of creep. However, the rate of strain after the overheating at the beginning is lower than that in the second stage of creep.

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Xing, Yuming, Tong Sun, and Xiaoan Hu. "Effect of Pre-creep Time on Creep Life of Nickel-based Single Crystal Superalloy CMSX-4." Journal of Physics: Conference Series 2252, no. 1 (April 1, 2022): 012008. http://dx.doi.org/10.1088/1742-6596/2252/1/012008.

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Abstract The effect of overheating with different time on creep life and strain curve of CMSX-4 nickel-based single crystal superalloy was studied. The overheating tests at different temperatures and stresses were carried out. The tests results showed that the duration of the second stage of creep would be reduced when the overheating happened at the beginning of the creep test. The deformation of the alloy quickly entered the third stage of creep, which obviously reduces the creep life and total strain of the material. When the overheating occurs in the second stage of creep, the rate of strain would increase after overheating and then the total creep life decreased. When the overheating was introduced at the beginning of the creep tests, the strain accumulation during the overheating was greater than that in the second stage of creep. However, the rate of strain after the overheating at the beginning is lower than that in the second stage of creep.

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Xing, Yuming, Tong Sun, and Xiaoan Hu. "Effect of Pre-creep Time on Creep Life of Nickel-based Single Crystal Superalloy CMSX-4." Journal of Physics: Conference Series 2252, no. 1 (April 1, 2022): 012008. http://dx.doi.org/10.1088/1742-6596/2252/1/012008.

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Abstract The effect of overheating with different time on creep life and strain curve of CMSX-4 nickel-based single crystal superalloy was studied. The overheating tests at different temperatures and stresses were carried out. The tests results showed that the duration of the second stage of creep would be reduced when the overheating happened at the beginning of the creep test. The deformation of the alloy quickly entered the third stage of creep, which obviously reduces the creep life and total strain of the material. When the overheating occurs in the second stage of creep, the rate of strain would increase after overheating and then the total creep life decreased. When the overheating was introduced at the beginning of the creep tests, the strain accumulation during the overheating was greater than that in the second stage of creep. However, the rate of strain after the overheating at the beginning is lower than that in the second stage of creep.

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13

Dong, Yu, Rong Wang, Jing Xue, Jingran Shao, and Haibo Guo. "Assessment of Summer Overheating in Concrete Block and Cross Laminated Timber Office Buildings in the Severe Cold and Cold Regions of China." Buildings 11, no. 8 (July 29, 2021): 330. http://dx.doi.org/10.3390/buildings11080330.

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The aims of the paper were to clarify whether office buildings in the severe cold and cold regions are overheating, especially those with natural ventilation, and whether potential overheating is related to the building materials. The severe cold and cold regions of China were considered to be cool regions during summer. However, with global warming, improvements in the thermal performance of the building envelope and the urban heat island effect, office buildings in these regions are showing different degrees of overheating during summer. Two office building materials commonly used in this area, cross laminated timber (CLT) and concrete block, were simulated in this study. With reference to the overheating standard, the degree of overheating in six cities in the severe cold and cold regions was quantitatively analysed and the extent of overheating for the two building materials was compared. Finally, the influence of thermal insulation on building overheating is discussed, and some suggestions are put forward to improve the relevant national regulations in China. The results show that office buildings in the severe cold and cold regions experience overheating during summer, and CLT buildings are more prone to overheating than concrete buildings during summer. This is attributable to the different thermal mass of the materials. Thick insulation does increase the risk of building overheating, and the effect on concrete buildings is more pronounced. Concrete buildings with an insulation layer can experience overheating for 27–71 h more than buildings without an insulation layer. Insulation on CLT buildings only results in an increase of 11–37 h. When considering the current situation with summer overheating in the severe cold and cold regions, relevant codes should also be modified and improved accordingly to guide building design, so as to achieve low-carbon and energy-saving goals.

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14

Jaya, Wihana Kirana. "Fenomena Overheating Perekonomian Indonesia." Unisia 16, no. 31 (September 24, 1996): 71–79. http://dx.doi.org/10.20885/unisia.vol16.iss31.art8.

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15

Slaman, M., and R. Griessen. "Solar collector overheating protection." Solar Energy 83, no. 7 (July 2009): 982–87. http://dx.doi.org/10.1016/j.solener.2009.01.001.

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16

Wachter, Kerri. "Thermometers Recalled for Overheating." Internal Medicine News 39, no. 3 (February 2006): 34. http://dx.doi.org/10.1016/s1097-8690(06)72796-2.

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DICKS, GEOFFREY, and ALAN BUDD. "Is the Economy Overheating?" Economic Outlook 12, no. 1 (October 1987): 20–27. http://dx.doi.org/10.1111/j.1468-0319.1987.tb00365.x.

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18

Miller, J. M., and A. P. Redgrave. "Overheating and cot death." Lancet 338, no. 8782-8783 (December 1991): 1595. http://dx.doi.org/10.1016/0140-6736(91)92416-y.

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19

Yu, Yang, Yu Shao, Bolun Zhao, Jiahui Yu, Haibo Guo, and Yang Chen. "Study on Summer Overheating of Residential Buildings in the Severe Cold Region of China in View of Climate Change." Buildings 13, no. 1 (January 15, 2023): 244. http://dx.doi.org/10.3390/buildings13010244.

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Due to global warming, the overheating risk in the severe cold region of China has attracted attention, but so far, no studies have examined summer overheating in this region. This paper aims to reveal the overheating risk in recent and future climates in the severe cold region of China. An 18-storey residential building in the severe cold region of China was monitored from May to September 2021 to validate the simulation data of the indoor temperature. Weather files of the typical meteorological year (TMY) from 2007 to 2020, observations in 2021, and forecasts for the climate in different carbon emission scenarios (2030, 2060) were used to simulate the indoor temperature and assess the overheating risk. The results revealed the severity of the overheating risk; the overheating hours in the south-facing bedroom were recorded as 884 h (24.07%) with the TMY weather data and 1043 h (28.40%) in 2030 and 1719 h (46.81%) in 2060 under the RCP8.5 carbon emission scenario. Thus, the low carbon emissions policy may significantly alleviate overheating. Moreover, to cope with climate change, it is suggested that the Chinese local design standards should consider the summer overheating risk and make the necessary adjustments.

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20

Liu, Shi Zhong, Zhen Xue Shi, M. Han, and Jia Rong Li. "Microstructure Evolution and Stress Rupture Properties of DD6 Single Crystal Superalloy after Overheating." Materials Science Forum 898 (June 2017): 517–22. http://dx.doi.org/10.4028/www.scientific.net/msf.898.517.

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The second generation single crystal superalloy DD6 after standard heat treatment was respectively overheated at 1100°C, 1150°C, 1200°C, 1250°C, 1300°C, 1320°C for 1h and air cooled. The effect of overheating on the microstructure and stress rupture properties at 980°C/250MPa of the alloy was investigated. The results showed that the size of γ′ phase was slightly increased overheating at 1100°C, 1150°C and 1200°C. The size of γ′ phase had a big increase and its size distribution was very uneven after overheating at 1250°C. The small part of γ′ phase has serrated γ′/γ phase surface as a result of un-completely solution and the irregular small γ′ phase was in the majority when overheated at 1300°C. While all the irregular small γ′ phase precipitated again after completely solution when overheated at 1320°C. There was no fine second γ′ phase in the γ matrix channel of the alloy after standard heat treatment and overheating at 1320°C. But the fine second γ′ phase precipitated in the γ matrix channel after overheating at every temperature of 1100 °C~1300°C. No obvious change of the stress rupture life was found after overheating at 1100°C, 1150°C, 1200°C and 1250°C. The stress rupture life considerably reduced after overheating at 1300°C, whereas slightly reduced after overheating at 1320°C. The appearance of the raft had almost no change after overheating at 1100°C. With increasing of overheating temperature from 1100°C to 1250°C, the length of raft became shorter and the width thickening. The γ phase formed the wavy raft after overheating at 1300°C and 1320°C and the thickness of latter was larger than that of the former. Finally, the relationship between the microstructural evolution and stress rupture properties of the alloy after overheating was discussed.

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Weber, Andreas, and Katharina Resch. "Thermotropic overheating protection glazings: effect of functional additives and processing conditions on the overheating protection performance." Journal of Polymer Engineering 34, no. 2 (April 1, 2014): 161–72. http://dx.doi.org/10.1515/polyeng-2013-0275.

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Abstract Within this study, the effect of functional additives and processing conditions on the overheating protection performance of thermotropic systems with fixed domains (TSFD) for overheating protection purposes was evaluated. The focus was on improving the overheating protection performance of a prototype TSFD based on a UV curable acrylate resin by optimization of the material constitution (addition of functional additives like surfactants and nucleating agents) and the processing conditions (temperature conditions during manufacturing, annealing). For the evaluated system, an effect of the nucleating agent on the overheating protection performance was ascertained. Furthermore, omission of an annealing step improved the overheating protection performance slightly.

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Laouadi, Abdelaziz, Lili Ji, Chang Shu, Liangzhu (Leon) Wang, and Michael A. Lacasse. "Overheating Risk Analysis in Long-Term Care Homes—Development of Overheating Limit Criteria." Buildings 13, no. 2 (February 1, 2023): 390. http://dx.doi.org/10.3390/buildings13020390.

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Climate heat waves occurring in urban centers are a serious threat to public health and wellbeing. Historically, most heat-related mortalities have arisen from excessive overheating of building interiors housing older occupants. This paper developed an approach that combines the results from building simulation and bioheat models to generate health-based limit criteria for overheating in long-term care homes (LTCHs) by which the body dehydration and core temperature of older residents are capped during overheating events. The models of the LTCHs were created for buildings representative of old and current construction practices for selected Canadian locations. The models were calibrated using measurements of indoor temperature and humidity acquired from monitoring the building interiors and the use of published building energy use intensity data. A general procedure to identify overheating events and quantify their attributes in terms of duration, intensity, and severity was developed and applied to LTCHs to generate the limit criteria. Comparing the limit criteria from the proposed and comfort-based methods showed evident differences. The proposed method predicted the overheating risk consistent with the overall thermal comfort during overheating events in contrast to the comfort-based methods. The new limit criteria are intended to be used in any study to evaluate overheating risk in similar buildings.

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Yuan, Yue, Jisoo Shim, Seungkeon Lee, Doosam Song, and Joowook Kim. "Prediction for Overheating Risk Based on Deep Learning in a Zero Energy Building." Sustainability 12, no. 21 (October 29, 2020): 8974. http://dx.doi.org/10.3390/su12218974.

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The Passive House standard has become the standard for many countries in the construction of the Zero Energy Building (ZEB). Korea also adopted the standard and has achieved great success in building energy savings. However, some issues remain with ZEBs in Korea. Among them, this study aims to discuss overheating issues. Field measurements were carried out to analyze the overheating risk for a library built as a ZEB. A data-driven overheating risk prediction model was developed to analyze the overheating risk, requiring only a small amount of data and extending the analysis throughout the year. The main factors causing overheating during both the cooling season and the intermediate seasons are also analyzed in detail. The overheating frequency exceeded 60% of days in July and August, the midsummer season in Korea. Overheating also occurred during the intermediate seasons when air conditioners were off, such as in May and October in Korea. Overheating during the cooling season was caused mainly by unexpected increases in occupancy rate, while overheating in the mid-term was mainly due to an increase in solar irradiation. This is because domestic ZEB standards define the reinforcement of insulation and airtight performance, but there are no standards for solar insolation through windows or for internal heat generation. The results of this study suggest that a fixed performance standard for ZEBs that does not reflect the climate or cultural characteristics of the region in which a ZEB is built may not result in energy savings at the operational stage and may not guarantee the thermal comfort of occupants.

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Ibrahim, Azlizawati, and Sofie LJ Pelsmakers. "Low-energy housing retrofit in North England: Overheating risks and possible mitigation strategies." Building Services Engineering Research and Technology 39, no. 2 (January 22, 2018): 161–72. http://dx.doi.org/10.1177/0143624418754386.

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In the drive to reduce space-heating demand and associated CO2 emissions as well as tackle fuel poverty, dwelling overheating and summer-time occupant thermal discomfort might be the unintended consequences of low-energy building retrofits. This paper presents the findings of a steady-state modelled low-energy retrofit dwelling in northern England and its potential current and future climate overheating risks using UK Climate Projections 2009 (UKCP09) scenarios (2050 and 2080 High Emission Scenarios). Predictive findings highlight that retrofitting to low-energy standards increases overheating risk over time, unless passive prevention measures are included in the retrofit design. In addition, the steady-state nature of the model might not fully capture the occupants’ exposure to actual future overheating risks. Among the most effective individual passive overheating mitigation strategies are temporary internal shading, permanent external shading and night-time ventilation. Most effective is a combination of these adaptation measures, so that predictive overheating is minimised in a future changing climate, reducing the uptake of active cooling in retrofitted dwellings. Practical application: Much research focuses on building overheating risks in the warmer South-east of England. However, this paper highlights how dwelling retrofit in north England (Sheffield) also can lead to increased dwelling overheating risk, unless passive design measures are included in the retrofit design. Among the most effective individual passive overheating mitigation strategies are solar shading devices and increased night-time ventilation, though ideally different measures are combined. Using future climate scenarios highlights that retrofits designed today might not be able to provide occupant thermal comfort in a future warming world.

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Huebner, Gesche M. "The role of parenthood in worry about overheating in homes in the UK and the US and implications for energy use: An online survey study." PLOS ONE 17, no. 12 (December 1, 2022): e0277286. http://dx.doi.org/10.1371/journal.pone.0277286.

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Climate change brings an increase in temperatures and a higher frequency of heatwaves. Both have been linked to a rise in suicide rates and violent crime on a population level. However, little is known about the link between mental health and ambient temperatures on an individual level and for particular subgroups. Overheating poses health risks to children and disturbs sleep; leading to the expectation that parents are more worried about their homes getting too hot than non-parents. Two online survey studies (N = 1000 each) were conducted in the UK and the US to understand to what extent parents and an age-matched comparison group without children are worried about overheating and how they differ in their mitigation actions. Findings did not support the main hypotheses around greater overheating worry amongst parents in general, mothers or those with very young children. However, parents indicated a greater likelihood to upgrade or install air-conditioning (US) and to get electric fans (UK). Parents in the UK indicated using more mitigation options to cope with overheating than non-parents. Parents in the US, whilst not reporting doing more actions, were more likely to use air-conditioning to deal with overheating than non-parents. Finally, those parents who mentioned health impacts on children as a reason for worry about overheating, were more concerned about overheating than parents who had other reasons than children’s health as a reason for being concerned about overheating. In summary, parental status might have implications for cooling energy use and concern for children’s health might increase overheating worry; however, many open questions remain.

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Khan, Hassan Saeed, Riccardo Paolini, Mattheos Santamouris, and Peter Caccetta. "Exploring the Synergies between Urban Overheating and Heatwaves (HWs) in Western Sydney." Energies 13, no. 2 (January 18, 2020): 470. http://dx.doi.org/10.3390/en13020470.

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There is no consensus regarding the change of magnitude of urban overheating during HW periods, and possible interactions between the two phenomena are still an open question, despite the increasing frequency and impacts of Heatwaves (HW). The purpose of this study is to explore the interactions between urban overheating and HWs in Sydney, which is under the influence of two synoptic circulation systems. For this purpose, a detailed analysis has been performed for the city of Sydney, while considering an urban (Observatory Hill), in the Central Business District (CBD), and a non-urban station in Western Sydney (Penrith Lakes). Summer 2017 was considered as a study period, and HW and Non-Heatwave (NHW) periods were identified to explore the interactions between urban overheating and HWs. A strong link was observed between urban overheating and HWs, and the difference between the peak average urban overheating magnitude during HWs and NHWs was around 8 °C. Additionally, the daytime urban overheating effect was more pronounced during the HWs when compared to nighttime. The advective flux was found as the most important interaction between urban overheating and HWs, in addition to the sensible and latent heat fluxes.

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Guo, Xiaotong, Hao He, Fangzhou Chen, Jiahao Liu, Wendao Li, and Hao Zhao. "Microstructural Degradation and Creep Property Damage of a Second-Generation Single Crystal Superalloy Caused by High Temperature Overheating." Materials 16, no. 4 (February 17, 2023): 1682. http://dx.doi.org/10.3390/ma16041682.

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Nickel base superalloys are widely used to manufacture turbine blades, and overheating poses a serious threat to the safe service of turbine blades. In this study, a second-generation nickel base single crystal superalloy was taken as the research object, and we carried out the overheating treatment at 1100 °C and 1300 °C, and then tested the creep properties at 1000 °C/300 MPa and 1100 °C/130 MPa. Through systematic analysis of creep properties, γ/γ’ phases, and creep voids, the effects of overheating on the microstructures and creep properties of the experimental superalloy were revealed. The results demonstrate that the effect of overheating at 1100 °C on the microstructure of the experimental superalloy can be ignored, and the effect on the creep property is limited. The degree of γ’ dissolution is gradually increased and the creep property is reduced with overheating time extending at the overheating temperature of 1300 °C.

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Cary, Eve Oleta. "Explaining Overheating in China through Institutional Analysis (1992–2010)." Asian Survey 51, no. 3 (May 1, 2011): 540–58. http://dx.doi.org/10.1525/as.2011.51.3.540.

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Economic overheating is a significant and recurring problem in modern China. This paper analyzes the many factors causing overheating and argues that there are systemic and largely structural explanations for overheating that arise from a number of theorized catalysts, including a bureaucratic catalyst and a historical catalyst.

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Yu, Yun, and Jing Hu. "The Effect of Overheating Treatment on the Crystal Orientation of TbDyFe Alloy." Advanced Materials Research 549 (July 2012): 711–14. http://dx.doi.org/10.4028/www.scientific.net/amr.549.711.

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The effect of overheating treatment on the crystal orientation of the Tb0.27Dy0.73Fe1.9 alloy was investigated. The results indicated that different overheating treatment conditions could obtain different crystal orientation. It means that overheating treatment affects the process of Tb0.27Dy0.73Fe1.9 solidification. The conjectural discussions of these results are also presented.

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Bo, Rui, Yu Shao, Yitong Xu, Yang Yu, Haibo Guo, and Wen-Shao Chang. "Research on the Relationship between Thermal Insulation Thickness and Summer Overheating Risk: A Case Study in Severe Cold and Cold Regions of China." Buildings 12, no. 7 (July 17, 2022): 1032. http://dx.doi.org/10.3390/buildings12071032.

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Given the prediction of global warming, there is a growing concern about overheating in the severe cold and cold regions of China. In the past decades, indoor thermal comfort has been neglected in building practice, while efficiency-oriented improvements have been developed, such as increased insulation of building envelope. An extensive literature review shows contradictory conclusions about whether increased insulation can alleviate overheating. The aim of this research is to conduct simulations based on measured data to reveal the influence of insulation on overheating in dwellings in these regions of China. An unoccupied residential flat was monitored to determine the extent of overheating while eliminating the effects of other contributors, such as natural ventilation. Validated building performance simulations were carried out with altered insulation layer thickness in Integrated Environmental Solutions-Virtual Environment IESVE software to examine its influence on overheating during summertime in five representative cities. The results showed clear evidence of summer overheating in these regions. In Yichun, Harbin, Shenyang, Dalian and Beijing, walls with increased insulation were found to exacerbate overheating in the bedrooms without natural ventilation by 22.5%, 16.6%, 20.3%, 11.8% and 6.9%, respectively, compared to the uninsulated walls. This study provides useful information for building regulations on energy efficiency and thermal comfort.

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Jang, Jihoon, Sukumar Natarajan, Joosang Lee, and Seung-Bok Leigh. "Comparative Analysis of Overheating Risk for Typical Dwellings and Passivhaus in the UK." Energies 15, no. 10 (May 23, 2022): 3829. http://dx.doi.org/10.3390/en15103829.

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There is growing concern that airtight and well-insulated buildings designed to limit heat loss in temperate and cold climates could unintentionally elevate the risk of overheating in summers. Existing literature primarily uses dynamic simulation to investigate this problem due to the difficulty of obtaining large-scale in-performance data. To address this gap, we undertake a meta-analysis of large-scale indoor air temperature data for 195 UK dwellings, as a study of performance in a temperate climate. Of these, 113 are baseline (i.e., typical existing dwellings) and the rest designed to the high-performance Passivhaus standard. Using both Passivhaus and the well-known CIBSE TM59 overheating standards, this study found that there were few overheated cases for any building type. However, the average summer nighttime temperature of Passivhaus bedrooms was 1.6 °C higher than baseline, with 20 out of 31 measured bedrooms exceeding the overheating criterion, and the average overheating hours constituting approximately 19% of the total summertime observation period. These findings suggest that bedrooms in highly insulated dwellings may pose an overheating risk although whole-dwelling overheating risk is low.

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Ying, Zhan Feng, Yun Yun Chen, Wei Chao He, Jun Ji Wu, and Kai Feng. "A New Extension Method in Diagnosis of Transformer Overheating Fault." Advanced Materials Research 562-564 (August 2012): 1757–61. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1757.

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For the transformer overheating fault diagnosis based on extenics, this paper proposes the extension diagnosis method that uses the matter element having all the characteristics and piecewise linearization correlation function. The method ensures the consistency of each overheating fault characteristics and overcomes the limitation of elementary correlation function in the infinite interval. The simulation result with 20 groups of overheating fault of which type is known shows that the proposed method overcomes the improved three-ratio method’s defects that multiple overheating fault can’t be diagnosed and the diagnosis precision isn’t high. Better diagnosis effect is obtained.

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Tian, Zhiyong, and Bozena Dorota Hrynyszyn. "Overheating risk of a typical Norwegian residential building retrofitted to higher energy standards under future climate conditions." E3S Web of Conferences 172 (2020): 02007. http://dx.doi.org/10.1051/e3sconf/202017202007.

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Heat waves had attacked Norway in 2018 and 2019. Residents in Norway experienced a very uncomfortable indoor environment in the summer of 2018 and 2019. Few publications on the overheating risk of a typical Norwegian residential building under future climate change conditions were found. The typical Norwegian residential building retrofitted according to the minimum Norwegian energy requirements in the Norwegian Building Act of 2010 (Pbl2010/TEK17) and the international EnerPHit Standard was modelled in this study. Overheating risk of the typical residential building was simulated by Energy Plus engine via Ladybug and Honeybee plugins based on the Grasshopper. Overheating hours of the studied rooms under present-day, the 2050s and the 2080s weather conditions were shown. Too good airtightness does increase the overheating risk of the building when retrofitted to higher energy standards. It was found in this study that better insulation does reduce the overheating hours of the bedrooms slightly. This may be caused by low g-value of the windows based on recommendation according to the EnerPHit Standard. Overheating should be paid more attention in term of the expected future climate conditions. These results can provide some references to the buildings retrofitted to high-performance buildings.

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Valeo, Tom. "Important Reasons to Avoid Overheating." Brain & Life 17, no. 3 (2021): 10–11. http://dx.doi.org/10.1097/01.nnn.0000754648.17507.40.

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35

Illarionov, O. Yu. "OVERHEATING OF SECTORAL LEGAL SCIENCE." Economics and Law, no. 1 (April 3, 2019): 87–112. http://dx.doi.org/10.15407/econlaw.2019.01.087.

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Eriksen, Thomas Hylland. "Overheating: the world since 1991." History and Anthropology 27, no. 5 (August 10, 2016): 469–87. http://dx.doi.org/10.1080/02757206.2016.1218865.

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Métois, J. J., and J. C. Heyraud. "The overheating of lead crystals." Journal de Physique 50, no. 21 (1989): 3175–79. http://dx.doi.org/10.1051/jphys:0198900500210317500.

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Kut'in, A. B., and A. M. Polyakova. "Structural heredity and residual overheating." Metal Science and Heat Treatment 33, no. 8 (August 1991): 588–90. http://dx.doi.org/10.1007/bf00774838.

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Weber, Andreas, and Katharina Resch. "Thermotropic glazings for overheating protection." Energy Procedia 30 (2012): 471–77. http://dx.doi.org/10.1016/j.egypro.2012.11.056.

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Mitchell, Rachel, and Sukumar Natarajan. "Overheating risk in Passivhaus dwellings." Building Services Engineering Research and Technology 40, no. 4 (April 8, 2019): 446–69. http://dx.doi.org/10.1177/0143624419842006.

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Highly insulated and airtight homes designed to reduce energy consumption are perceived as having a greater summer overheating risk than less insulated homes. If true, dwellings built to the well-known low-energy Passivhaus (PH) standard could be at greatest risk due to the use of superinsulation, especially as the climate warms. Existing studies are inconclusive and even contradictory, mainly due to small sample sizes. Hence, this paper presents the first large-scale overheating risk analysis of UK Passivhaus dwellings using high-resolution internal temperature data from 82 homes across the UK. Both the Passivhaus and the recently published Chartered Institution of Building Services Engineers TM59 criteria are analysed. Results show that the whole-dwelling Passivhaus standard, which uses a fixed temperature threshold, is met more frequently (83%) than when applied on a room-by-room basis (e.g. only 60% of bedrooms in houses meet the standard). TM59-1A, which uses an adaptive temperature threshold, is easier to meet with 100% of flats and 82% of houses in compliance. However, 55% of bedrooms assessed under TM59-1B fail, with little difference between flats and houses. This is a remarkable finding given that the summers under consideration were either typically mild or cooler than average, and that sleep impairment can significantly affect both physical and mental health. These results suggest that highly insulated dwellings such as Passivhaus should consider overheating in individual rooms, rather than at whole-dwelling level. Analysis should be undertaken throughout the year with particular attention to bedrooms, using either the good-practice PH-5% exceedance threshold which maps well to TM59-1B, or TM59-1B itself. Practical application: Overheating risk in new dwellings is an industry concern. Having the correct tools to predict this risk at design stage is important to help design comfortable and healthy dwellings for both today's climate and future, hotter climates. Comparing two different tools and their methodologies using in-use data is critical to gain confidence in their application at the design stage and to further understand overheating risk, including which dwelling types and rooms are more vulnerable to overheating.

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Brotas, Luisa, and Fergus Nicol. "Estimating overheating in European dwellings." Architectural Science Review 60, no. 3 (March 31, 2017): 180–91. http://dx.doi.org/10.1080/00038628.2017.1300762.

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Fialko, Nataliia, Roman Dinzhos, Julii Sherenkovskii, Nataliia Meranova, Diana Izvorska, Volodymyr Korzhyk, Maxim Lazarenko, and Neli Koseva. "Establishing patterns in the effect of temperature regime when manufacturing nanocomposites on their heat-conducting properties." Eastern-European Journal of Enterprise Technologies 4, no. 5(112) (August 31, 2021): 21–26. http://dx.doi.org/10.15587/1729-4061.2021.236915.

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This paper reports the experimental study carried out to establish the dependence of the thermal conductivity of polypropylene-based nanocomposites filled with carbon nanotubes on the main parameter of the temperature regime of their manufacturing ‒ the level of overheating a polymer melt relative to its melting point. The study has been conducted for nanocomposites that were manufactured by applying a method based on the mixing of components in the polymer melt applying a special disk extruder. During the composite manufacturing process, the level of melt overheating varied from 10 to 75 K, with the mass share of filler ranging from 0.3 to 10.0 %. It is shown that increasing the overheating of a polymer melt causes an increase in the thermal conductivity of the composites. However, when the overheating has reached a certain value, its further growth does not increase the thermal conductivity of nanocomposites. Based on the established pattern, the rational level of this overheating has been determined. That resolves the tasks of manufacturing highly heat-conducting nanocomposites and implementing appropriate energy-saving technology. Data have been acquired on the effects of the impact of the amount of polymer melt overheating on the values of the first and second percolation thresholds for the examined nanocomposites. It is established that the value of the first percolation threshold is more sensitive to the specified amount of overheating. The dependences of the density of the examined composites on the level of polymer melt overheating have been derived. The correlation between a given dependence and the nature of a corresponding change in the thermal conductivity of the composites has been established. Applying the proposed highly heat-conducting nanocomposites is promising for micro and nanoelectronics, energy, etc.

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Gupta, Rajat, and Matt Gregg. "Assessing the Magnitude and Likely Causes of Summertime Overheating in Modern Flats in UK." Energies 13, no. 19 (October 6, 2020): 5202. http://dx.doi.org/10.3390/en13195202.

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There has been increasing recognition that climate change may lead to risk of summertime overheating in UK dwellings with potentially adverse consequences for human comfort and health. This paper investigates the magnitude of summertime overheating over one month in 2017, in four new flats built to identical thermal standards, with similar occupancy patterns and located in the same block in a development in Southeast England. Both static and adaptive methods were used to assess the overheating risk, while the variation in indoor temperatures across the flats was examined through key building characteristics including floor level, glazing orientation, exposed surface area to floor area ratio (SA/FA), glazing area to floor area ratio, and ventilation. Data collection included continuous monitoring of indoor and outdoor temperature, relative humidity, CO2 levels and opening/closing of windows. Summertime overheating was found to be prevalent in all four flats but was most pronounced in two top floor flats with high SA/FA ratio and east/west facing glazing. Due to limited window opening and locational limitations of one flat, some conclusions were derived from three flats. Though the study sample is small, it is clear that overheating in new housing is a current issue and designing for avoidance of summertime overheating should become mainstream.

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Li, Xiaoyi, Jonathon Taylor, and Phil Symonds. "Indoor overheating and mitigation of converted lofts in London, UK." Building Services Engineering Research and Technology 40, no. 4 (April 3, 2019): 409–25. http://dx.doi.org/10.1177/0143624419842044.

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In the UK, there has been an increase in the number of loft conversions, driven by demands for increased floor areas of dwellings to accommodate more individuals or increase property values. While rooms directly underneath roofs are known to have increased overheating risks, there is little research available that quantifies this risk, and how to mitigate it cost-effectively. This paper seeks to evaluate overheating risks in loft conversions, using integrated environmental solutions virtual environment to dynamically simulate indoor temperatures in a semi-detached dwelling in London, UK, under current and future (2050s and 2080s medium and high emissions) climate scenarios. Adaptive overheating risk and energy consumption are calculated with and without passive overheating adaptations that reduce solar gains, increase ventilation, or add thermal insulation. Marginal abatement cost curves (MACC) are then used to select the most cost-effective adaptations based on installation and ongoing energy consumption costs. Results estimate 11,340–12,210 more summertime Category I overheating degree-hours for the loft than conventional bedrooms in the dwelling under the current climate; total category I loft overheating degree-hours may increase to 20,319 by 2080. While external shutters and night-purge ventilation were the most effective at reducing overheating degree-hours (96% and 89%, respectively), the most cost-effective solutions considering capital and ongoing costs are ventilation strategies, including night-time purge ventilation, advance ventilation and cross ventilation. Passive adaptations are not capable of eliminating overheating entirely, and by the 2080s active cooling is likely to be required to maintain comfortable indoor conditions in lofts. Practical application: Converted lofts – present in 5.8% of English and 10.8% of London dwellings – are at significantly elevated risk of high indoor temperatures relative to conventional rooms. Passive adaptations such as ventilation and shading can effectively mitigate loft overheating until around 2080, after which active measures become necessary. When capital and ongoing costs are considered, the most cost-effective heat mitigating adaptations are night and advance ventilation and internal curtains/blinds. Heat mitigating adaptations for converted lofts should become mandatory, and such spaces should not be occupied by the vulnerable or elderly during hot weather.

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Kou, Xinghua, Lili Li, and Wanli Wang. "Overheat fault analysis of drillship electric winch drive system." Journal of Physics: Conference Series 2029, no. 1 (September 1, 2021): 012152. http://dx.doi.org/10.1088/1742-6596/2029/1/012152.

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Abstract In order to solve the problem of winch motor overheating, this paper analyzes the possible reasons of motor overheating along with the structure and principle of drillship winch. Taking the overheating fault of drillship’s driving motor as the top event, the fault tree model of the overheating problem of the driving motor is established, and the relative weak links of the winch are found out through the minimum cut set. With the result of fault tree analysis as a guide, the lifting device was inspected, the fault reason of the lifting device was found out, and the corresponding solutions were put forward. The results show that the proposed method in the paper can improve the efficiency of fault location.

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Liu, Chun Jing, Xin Ling Liu, and Kai Zhao. "Analysis of an Engine Front Baffle Fatigue Cracking." Advanced Materials Research 889-890 (February 2014): 250–53. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.250.

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Front baffle cracking in low-cycle fatigue strength test was investigated. It is suggested that there was overheating running in the test by visual examination of baffle surface color and fracture surface color. It is obtained that the front baffle was cracked by fatigue mechanism by observation of fracture surface. It is confirmed that the temperature range of overheating was about 700~750°C by temperature and color test. It is shown that the value of hardness decreased heavily when temperature was above 700°C by hardness measurement of sample in temperature and color test, demonstrating the mechanical property decreased severely in the overheating temperature range. Finally, the root cause for the cracking of front baffle might be attributed to overheating running in the test.

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Indrawan, Dodi. "Analisa Overheating Pada Kompresor Sullair LS16-60/75/100." JTTM : Jurnal Terapan Teknik Mesin 1, no. 1 (April 11, 2020): 25–31. http://dx.doi.org/10.37373/msn.v1i1.14.

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Background The problem faced is overcoming the Overheating of the Screw Air Compressor, the air circulation in the compressor chamber is not good, the Oil has passed the Normal Working Hours, the Oil Separator is clogged, the heat dissipation is blocked in the Coller Unit, the oil filter is clogged with dirt, the Distribution Mechanism in the Oil Filter Housing The unit does not work. Aim of overcoming the overheating that occurs in the compressor which results in a decrease in air pressure on the engine in the production section, knowing the cause of the damage or downtime. Method used is observation of the compressor operation, and checking the compressor engine components. Results and Discussion Overheating on the compressor engine will have an impact on the performance of the engine itself and the air produced. Overheating in the compressor engine is caused by several things including poor air circulation, so the air gets hot and the engine performance decreases. Conclusion minimize damage caused by overheating is to carry out maintenance of the water cooler and oil coller

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Swedberg, Nicholas. "Robust Optimisation of Building Retrofits for Present versus Future Climate Scenarios in Humid Continental Climates (Dfb subtype) to Reduce Heating Demand and Mitigate Future Overheating Risk." E3S Web of Conferences 362 (2022): 11002. http://dx.doi.org/10.1051/e3sconf/202236211002.

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The outdoor environment is a major driver of building performance; a changing climate poses a significant challenge to the effective deployment of building retrofits. The Dfb Köppen climate zone, a humid continental climate with warm summer subtype, is poised to confront significant annual and seasonal temperature changes within the next thirty years. This study examined the relationship between retrofits’ ability to reduce heating demand and simultaneously mitigate future overheating risk. A low-rise apartment was used as the basis of a multi-objective design optimisation (MODO) that modelled building heating demand and overheating risk across a series of input variables, considered either optimisable (i.e.: building envelope upgrades) or non-optimisable (i.e.: occupancy profiles) in the context of this study. The metric overheating-degree-hours (OHDH) was utilised to assess overheating risk. The results of this study reinforced previous findings indicating envelope upgrades can significantly reduce heating demand, but also underscored the importance of implementing solar heat gain mitigation strategies for overheating risk reduction. Additionally, the study highlighted the appropriateness of amalgamated weather data for performance analysis.

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Goncalves, V., and T. Rakha. "The role of complex airflow simulation tools for overheatingassessment of passive houses." Journal of Physics: Conference Series 2069, no. 1 (November 1, 2021): 012170. http://dx.doi.org/10.1088/1742-6596/2069/1/012170.

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Abstract Passive Houses are characterized mainly by construction concepts that greatly reduce energy usage during the winter, but that can lead to significant overheating during the hotter summer days. Since in the Passive House concept thermal comfort during the summer mainly relies on natural ventilation to provide indoor cooling, the importance of airflow modeling tools for overheating prediction needs to be investigated. This research analyzes the effect of simplifications commonly made in airflow modeling techniques on the overheating assessment of Passive Houses by collecting measured data and calibrating a thermal model with a Passive House case study. Utilizing the calibrated model, a standalone Building Energy Model (BEM), BEM coupled with an Airflow Network Model (AFN), and BEM coupled with an AFN supported by the wind pressure coefficient values obtained from Computational Fluid Dynamics (CFD) simulation were created. The outcome of each modeling approach was then compared against each other. Results showed that the default infiltration and natural ventilation input values commonly utilized in literature, when compared to those obtained from either the AFN or AFN+CFD, are significantly overestimating the natural ventilation potential of Passive House buildings, resulting in a lower number of overheating hours (39.9% decrease) and inaccurate overheating evaluation outcomes. Therefore, the paper concludes that the use of at least an AFN is necessary when estimating the overheating hours of Passive Houses.

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Harvie-Clark, Jack, Anthony Chilton, Nick Conlan, and David Trew. "Assessing noise with provisions for ventilation and overheating in dwellings." Building Services Engineering Research and Technology 40, no. 3 (January 29, 2019): 263–73. http://dx.doi.org/10.1177/0143624418824232.

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In the design of residential developments, it has been common practice for façade sound insulation (to protect against outdoor noise) to be considered separately from the provisions for ventilation and for mitigating overheating. This fragmented approach has led to different designers making different, incompatible assumptions about the internal environmental quality conditions: the acoustic designer assumes that windows are closed to control external noise ingress, while the mechanical designer assumes that windows are open for ventilation or mitigating overheating. This leaves occupants with a choice between reasonable noise levels or thermal comfort, but not both. This problem is exacerbated by increased overheating risk in modern buildings and future climate scenarios. In response to this issue, the Association of Noise Consultants has produced the draft Acoustics Ventilation and Overheating Residential Design Guide – the ‘AVO Guide’. The AVO guide recommends an approach to acoustic assessment that takes regard of the interdependence of provisions for external noise ingress, ventilation and overheating. This paper describes the context, background and content of the AVO Guide. There are references to passive attenuated options for ventilative cooling to help designers avoid simply specifying mechanical cooling. Practical application: This paper is entirely focused on the practical application of the guidance in the Association of Noise Consultants’ Acoustics, Ventilation and Overheating Residential Design Guide. It describes the current practical problem that designers face, and the mistakes that are the common practice across the industry, of failing to integrate the design for noise with the ventilation strategy and provisions for overheating. It outlines how this can be achieved to enable better internal environmental quality conditions for occupants, supported by the current English Planning regime and professional good practice guidance available.

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Journal articles on the topic 'Overheating'

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