scholarly journals Analysis of the possibilities for improvement of thermal comfort of living quarters located in multi-family large-panel prefabricated buildings

2018 ◽  
Vol 44 ◽  
pp. 00145
Author(s):  
Konrad Podawca ◽  
Agata Pawłat-Zawrzykraj ◽  
Marek Dohojda
Keyword(s):  
Twentieth Century ◽  
Real Estate ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Optimal Temperature ◽  
Large Panel ◽  
Before And After ◽  
Optimal Temperature Range ◽  
Family Building

The article discusses the issue of low thermal insulation of partitions in large-panel prefabricated buildings. They were constructed mainly in the 70's and the 80's of the twentieth century. Defects related to freezing as well as vertical and horizontal joints of prefabricated walls, began to appear as early as in the very first years of operation. It was very burdensome for flat users due to lack of thermal comfort, mycological problems and rising heating costs. The thermovision analysis covered sections of panel partitions in real estate at Lazurowa Street in Warsaw, which is a four-storey multi-family building, constructed in large-panel system. The measurements were carried out in the periods of January-February 2016 before the thermal modernization of the building, and in January 2018 after its modernization and renovation of the flat. Before-and-after comparison of thermal insulation state was made on the basis of surface temperatures of crucial spots. Furthermore, after changes in the structure of external walls were finished, thermal comfort or discomfort in the analysed room were visualised, using graphs of the optimal temperature range of walls, ceiling and floor, depending on the air temperature in the room.

scholarly journals Influence of building orientation on internal temperature in saharan climates, building located in Ghardaïa region (Algeria)

2013 ◽  
Vol 17 (2) ◽  
pp. 349-364 ◽  
Author(s):  
Sidi Bekkouche ◽  
Tayeb Benouaz ◽  
Mohamed Cherier ◽  
Maamar Hamdani ◽  
Mohamed Yaiche ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Thermal Inertia ◽  
Numerical Data ◽  
Internal Temperature ◽  
And Control ◽  
The Mathematical Model ◽  
Do So

In desert regions, the orientation of buildings has an important influence in the inside air temperature. In the present work, we carry out a study on the influence of the buildings orientation as well as the thermal insulation on the internal temperature. To do so, we have considered the case where only the exposed walls are isolated. The main objective of the current work is to determine the temperatures of the building in question with and without thermal insulation. This study aims at assessing also the geographic parameter enhancing or damping the role of thermal inertia, providing a variety of results. As result, this work proves that stones play a contradictory role on thermal comfort. We have verified that thermal insulation is specified to reduce heat transfer through the building. Concerning the orientation, results indicates that the variation in orientation does not influence significantly the internal air temperature of a well thermally insulated building. Moreover, in hot period, whatever orientation considered, the phenomenon of overheating presents a serious problem to minimize consumption of energy and control of indoor temperature in case of building without insulation. The numerical data was compared to the experimental measurements in order to validate the mathematical model. In conclusion, to achieve a better thermal comfort arid and semi arid regions, the habitation will have to be situated in south flan of a hill to satisfy the two strategies (hot and cold).

scholarly journals Technical note. Improving the microclimate of a rabbit house: thermal insulation and air handling

2019 ◽  
Vol 27 (1) ◽  
pp. 49 ◽  
Author(s):  
Karoly Bodnár ◽  
Gabor Bodnár ◽  
Laszlo Makra ◽  
Andrea Fülöp ◽  
Zoltan Farkas ◽  
...  
Keyword(s):  
Animal Welfare ◽  
Thermal Insulation ◽  
Energy Demand ◽  
Technical Note ◽  
Optimal Temperature ◽  
Surrounding Area ◽  
Model Calculations ◽  
Temperature Range ◽  
Air Handling Unit ◽  
Optimal Temperature Range

The aim of the paper is to modernise a farm building for rabbits and provide a possible solution for other farms. The model calculations are focused on the welfare viewpoint of rabbit breeding, i.e. first of all on ventilation, cooling and heating of the shed in order to approach the microclimate for meat rabbit production. The planned air handling unit can ensure the optimal temperature range (15-25°C) for rabbits all year round. In addition, thermal insulation and mechanical components of a rabbit house were planned and the possibility of reducing the energy demand of the building by more than 40% was analysed. The renewed rabbit farm is better suited to animal welfare requirements, as it can meet the environmental needs in production and reduces the building’s impact on the surrounding area.

ANALISIS KINERJA KEUANGAN PERUSAHAAN PROPERTI YANG TERDAFTAR DI BEI SEBELUM DAN SESUDAH KEBIJAKAN LOAN TO VALUE

2019 ◽  
Vol 4 (1) ◽  
pp. 79-90
Author(s):  
Ghaniy Ridha Prima ◽  
Hermanto Siregar ◽  
Ferry Syarifuddin
Keyword(s):  
Real Estate ◽  
Financial Performance ◽  
Stock Exchange ◽  
Sample Selection ◽  
Test Analysis ◽  
Asset Return ◽  
Return On Equity ◽  
Analysis Technique ◽  
Significant Difference ◽  
Before And After

The purpose of this study is to provide empirical evidence of the effects of the Loan to Value (LTV) policy on the financial performance of property and real estate companies listed on the Indonesia Stock Exchange (IDX). The sample selection uses a purposive sampling method of 42 property and real estate companies that meet the criteria. The research period is divided into 2 namely before the Loan to Value policy (2013-2014) and after the Loan to Value policy (2016-2017) with the Paired Sample t Test analysis technique. The test results show if the current ratio, Return on Asset, Return on Equity and Debt to Asset have significant differences between before and after the LTV policy is applied. While the fast ratio, cash ratio, net profit margin and Debt to Equity did not show a significant difference. Keywords: Financial Performance, Loan to Value, Property and Real Estate, Profitability Ratio, Liquidity Ratio, Solvability Ratio.

Carthage after the Punic Wars and the Neo-Punic Legacy

2019 ◽  
pp. 182-196
Author(s):  
Matthew Hobson
Keyword(s):  
Twentieth Century ◽  
North Africa ◽  
Cultural Change ◽  
Language Use ◽  
Cultural Development ◽  
Initial Examination ◽  
The Third ◽  
Funerary Rituals ◽  
Before And After ◽  
Punic Wars

This chapter provides a brief introduction to how the historiographical development of Roman studies, since mid-twentieth century decolonization, has altered our understanding of the developments which took place in North Africa following the destruction of Carthage in 146 bce. The reader is introduced to literary, epigraphic, and archaeological sources of evidence, which have traditionally been used to argue for either cultural change or continuity. After an initial examination of the immediate aftermath of the Third Punic War, Roman land appropriation and taxation, the focus is on sources of evidence usually described as “Punic,” “neo-Punic” or “Late Punic,” covering the spheres of municipal institutions, language use, and religious and funerary rituals. The vibrant multiculturalism and regional diversity of the Mediterranean and especially North Africa, both before and after the Roman conquest, is the dominant theme. This is used to shift emphasis away from grand explanatory paradigms based on essentialist identity categories, and toward a more nuanced picture of the complex and multivariate processes of cultural development and integration.

scholarly journals Evaluation of Bed Cover Properties Produced from Double Fabric Based on Honeycomb

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
A. A. Salama ◽  
A. S. El-Deeb ◽  
I. M. El-shahat
Keyword(s):  
Thermal Comfort ◽  
Water Vapour ◽  
Thermal Insulation ◽  
Abrasion Resistance ◽  
Air Permeability ◽  
Weft Yarn ◽  
Vapour Permeability ◽  
Geometrical Properties ◽  
Fabric Structure ◽  
Air Pockets

This research aims to innovate a new fabric structure, which could be used as a bed cover based on double honeycomb fabric with self-stitching. The honeycomb air pockets were aimed at facing each other to form closed small air chambers which work to sequester the air. The double fabric increases fabric thickness. Thus, the opportunity to improve thermal comfort could be achieved. A number of samples were produced with different densities and counts of weft yarn. Thermal insulation and water vapour permeability were measured and compared with bed covers produced from reversible weft backed structure. Geometrical properties, abrasion resistance, and air permeability were also measured. The results showed that the innovated structure had higher values of thermal insulation than reversible weft backed structure at certain weft counts and densities.

scholarly journals POWER LAWS IN REAL ESTATE PRICES DURING BUBBLE PERIODS

2012 ◽  
Vol 16 ◽  
pp. 61-81 ◽  
Author(s):  
TAKAAKI OHNISHI ◽  
TAKAYUKI MIZUNO ◽  
CHIHIRO SHIMIZU ◽  
TSUTOMU WATANABE
Keyword(s):  
Real Estate ◽  
Power Law ◽  
House Price ◽  
Power Laws ◽  
Cross Sectional ◽  
Price Distribution ◽  
Before And After ◽  
Real Estate Prices ◽  
Using Data ◽  
The U.S

How can we detect real estate bubbles? In this paper, we propose making use of information on the cross-sectional dispersion of real estate prices. During bubble periods, prices tend to go up considerably for some properties, but less so for others, so that price inequality across properties increases. In other words, a key characteristic of real estate bubbles is not the rapid price hike itself but a rise in price dispersion. Given this, the purpose of this paper is to examine whether developments in the dispersion in real estate prices can be used to detect bubbles in property markets as they arise, using data from Japan and the U.S. First, we show that the land price distribution in Tokyo had a power-law tail during the bubble period in the late 1980s, while it was very close to a lognormal before and after the bubble period. Second, in the U.S. data we find that the tail of the house price distribution tends to be heavier in those states which experienced a housing bubble. We also provide evidence suggesting that the power-law tail observed during bubble periods arises due to the lack of price arbitrage across regions.

scholarly journals The Street Air Warming Phenomenon in a High-Rise Compact City

Atmosphere ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 402 ◽  
Author(s):  
Xiaoxue Wang ◽  
Yuguo Li ◽  
Xinyan Yang ◽  
Pak Chan ◽  
Janet Nichol ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Air Temperature ◽  
Thermal Environment ◽  
Urban Climate ◽  
Pollutant Dispersion ◽  
Urban Morphology ◽  
Air Temperatures ◽  
Significant Difference ◽  
Sensitivity Studies ◽  
Weather Stations

The street thermal environment is important for thermal comfort, urban climate and pollutant dispersion. A 24-h vehicle traverse study was conducted over the Kowloon Peninsula of Hong Kong in summer, with each measurement period consisting of 2–3 full days. The data covered a total of 158 loops in 198 h along the route on sunny days. The measured data were averaged by three methods (direct average, FFT filter and interpolated by the piecewise cubic Hermite interpolation). The average street air temperatures were found to be 1–3 °C higher than those recorded at nearby fixed weather stations. The street warming phenomenon observed in the study has substantial implications as usually urban heat island (UHI) intensity is estimated from measurement at fixed weather stations, and therefore the UHI intensity in the built areas of the city may have been underestimated. This significant difference is of interest for studies on outdoor air temperature, thermal comfort, urban environment and pollutant dispersion. The differences were simulated by an improved one-dimensional temperature model (ZERO-CAT) using different urban morphology parameters. The model can correct the underestimation of street air temperature. Further sensitivity studies show that the building arrangement in the daytime and nighttime plays different roles for air temperature in the street. City designers can choose different parameters based on their purpose.

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