scholarly journals The impacts of COVID-19 pandemic on the hygrothermal environment of our homes

2021 ◽  
Vol 2069 (1) ◽  
pp. 012248
Author(s):  
Arianna Brambilla ◽  
Alberto Sangiorgio
Keyword(s):  
Residential Buildings ◽  
Mould Growth ◽  
Indoor Temperature ◽  
Residential Sector ◽  
Work From Home ◽  
Hygrothermal Performance ◽  
Transient Simulations ◽  
Current Design ◽  
Hygrothermal Environment ◽  
Humidity Profiles

Abstract In 2020 the residential sector witnessed a complete transformation of the way people live and occupy the spaces. Indeed, different Countries introduced total lockdowns as a measure to contain and prevent the spread of COVID-19, forcing people to stay at home. These measures impact the indoor hygrothermal environment: higher internal thermal loads and moisture generation rate may create the perfect situation to support mould growth. This project aims to understand the impacts of increased work-from-home practices on the hygrothermal performance of residential buildings. The assessment uses a two-step methodology: firstly, whole building transient simulations (software trnsys) are used to generate the indoor temperature and humidity profiles, secondly hygrothermal transient simulations (software WUFI) are used to quantify the risk of mould growth. This research reveals the inadequacy of current design and construction practices to support flexible occupation patterns.

Energy Consumption Pattern of Residential Buildings: Case Study of Residential Area in Batu Pahat, Johor

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
Junaidah Jailani ◽  
◽  
Norsyalifa Mohamad ◽  
Muhammad Amirul Omar ◽  
Hauashdh Ali ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Residential Buildings ◽  
Residential Area ◽  
Consumption Pattern ◽  
Air Conditioners ◽  
Residential Sector ◽  
Waste Energy ◽  
Main Factor ◽  
Energy Consumption Pattern

According to the National Energy Balance report released by the Energy Commission of Malaysia in 2016, the residential sector uses 21.6% of the total energy in Malaysia. Residents waste energy through inefficient energy consumption and a lack of awareness. Building occupants are considered the main factor that influences energy consumption in buildings, and to change energy consumption on an overall scale, it is crucial to change individual behaviour. Therefore, this study focused on analysing the energy consumption pattern and the behaviour of consumers towards energy consumption in their homes in the residential area of Batu Pahat, Johor. A self-administrated questionnaire approach was employed in this study. The findings of this study showed that the excessive use of air conditioners was a significant factor in the increasing electricity bills of homeowners as well as the inefficient use of electrical appliances. Also, this study determined the effect of awareness on consumer behaviour. This study recommends ways to help minimise energy consumption in the residential area.

scholarly journals Adaptability and transferability of flood loss functions in residential areas

2013 ◽  
Vol 1 (4) ◽  
pp. 3485-3527 ◽  
Author(s):  
H. Cammerer ◽  
A. H. Thieken ◽  
J. Lammel
Keyword(s):  
Flood Risk ◽  
Residential Buildings ◽  
Model Development ◽  
Loss Functions ◽  
Residential Areas ◽  
Damage Functions ◽  
Residential Sector ◽  
Geographical Regions ◽  
Flood Loss ◽  
Loss Data

Abstract. Flood loss modeling is an important component within flood risk assessments. Traditionally, stage-damage functions are used for the estimation of direct monetary damage to buildings. Although it is known that such functions are governed by large uncertainties, they are commonly applied – even in different geographical regions – without further validation, mainly due to the lack of data. Until now, little research has been done to investigate the applicability and transferability of such damage models to other regions. In this study, the last severe flood event in the Austrian Lech Valley in 2005 was simulated to test the performance of various damage functions for the residential sector. In addition to common stage-damage curves, new functions were derived from empirical flood loss data collected in the aftermath of recent flood events in the neighboring Germany. Furthermore, a multi-parameter flood loss model for the residential sector was adapted to the study area and also evaluated by official damage data. The analysis reveals that flood loss functions derived from related and homogenous regions perform considerably better than those from more heterogeneous datasets. To illustrate the effect of model choice on the resulting uncertainty of damage estimates, the current flood risk for residential areas was assessed. In case of extreme events like the 300 yr flood, for example, the range of losses to residential buildings between the highest and the lowest estimates amounts to a factor of 18, in contrast to properly validated models with a factor of 2.3. Even if the risk analysis is only performed for residential areas, more attention should be paid to flood loss assessments in future. To increase the reliability of damage modeling, more loss data for model development and validation are needed.

On the impact of user behaviour on heating energy consumption and indoor temperature in residential buildings

2021 ◽  
pp. 111657
Author(s):  
Marina Laskari ◽  
Rosa-Francesca de Masi ◽  
Stavroula Karatasou ◽  
Mat Santamouris ◽  
Margarita-Niki Assimakopoulos
Keyword(s):  
Energy Consumption ◽  
Residential Buildings ◽  
Indoor Temperature ◽  
User Behaviour ◽  
Heating Energy Consumption ◽  
The Impact

scholarly journals Indoor Temperature Validation of Low-Income Detached Dwellings under Tropical Weather Conditions

Climate ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 96 ◽  
Author(s):  
R. Alexis Barrientos-González ◽  
Ricardo E. Vega-Azamar ◽  
Julio C. Cruz-Argüello ◽  
Norma A. Oropeza-García ◽  
Maritza Chan-Juárez ◽  
...  
Keyword(s):  
Case Studies ◽  
Low Income ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Environmental Parameters ◽  
Weather Conditions ◽  
Environmental Data ◽  
Mean Bias Error ◽  
Bias Error ◽  
Indoor Temperature

Urban territorial expansion generated in the last decades has brought a series of consequences, such as the variation between urban and suburban weather conditions affecting indoor temperature and increasing electricity consumption derived from the use of cooling systems. Current approaches of simulation models in residential buildings use indoor environmental data for carrying out validations to propose hygrothermal comfort alternatives for the mitigation of the effects of the external environmental conditions on the interior spaces of dwellings. In this work, an hourly evaluation of both indoor and outdoor environmental parameters of two case studies in a tropical climate was carried out, by means of a whole-building simulation approach tool during a week representative of the warmest period of the year. The integration of the collected environmental data in the theoretical model allowed us to reduce the error range of the estimated indoor temperature with results in normalized mean bias error between 7.10% and −0.74% and in coefficient of variation of the root mean square error between 16.72% and 2.62%, in the different indoor zones of the case studies. At the same time, the energy assessment showed a difference of 33% in Case 1 and −217% in Case 2 for final electricity consumption.

A neuro–fuzzy model for prediction of the indoor temperature in typical Australian residential buildings

2009 ◽  
Vol 41 (7) ◽  
pp. 703-710 ◽  
Author(s):  
Haitham Alasha’ary ◽  
Behdad Moghtaderi ◽  
Adrian Page ◽  
Heber Sugo
Keyword(s):  
Residential Buildings ◽  
Fuzzy Model ◽  
Indoor Temperature ◽  
Neuro Fuzzy

Solar-Assisted Heat Pump Systems: A Review of Existing Studies and Their Applicability to the Canadian Residential Sector

2013 ◽  
Author(s):  
Jenny Chu ◽  
Cynthia A. Cruickshank
Keyword(s):  
Heat Pump ◽  
Residential Buildings ◽  
International Energy Agency ◽  
Heat Pumps ◽  
Hot Water ◽  
Performance Criteria ◽  
Space Heating ◽  
Residential Sector ◽  
Heating And Cooling ◽  
System Configurations

Heat pumps are commonly used for space-heating and cooling requirements. The combination of solar thermal and heat pump systems as a single solar-assisted heat pump (SAHP) system is a promising technology for offsetting domestic hot water, space-heating and cooling loads more efficiently. Task 44 of the Solar Heating and Cooling Programme of the International Energy Agency is currently investigating ways to optimize SAHP systems for residential use. This paper presents a review of past and current work conducted on SAHP systems. Specifically, the key performance data from many studies are highlighted and different system configurations are compared in order to establish insight towards which system configurations are suitable for the Canadian residential sector. It was found that the most suitable configuration for Canadian residential buildings depend on a combination of factors which may include occupant behavior, building characteristics, operation parameters, system components, the performance criteria of interest and climate. A large variety of configurations and parameters exist for SAHP systems and this made analyzing a specific system, comparing differing systems and establishing an optimal design fairly difficult. It was found that different authors used various different performance criterions and this inconsistency also added to the difficulty of comparing the studies of different systems. Overall, a standard performance criterion needs to be established for SAHP systems in order to meaningfully compare different configurations and determine optimal configurations for certain requirements.

scholarly journals Estrategias bioclimáticas para el diseño de edificios vinícolas

2020 ◽  
pp. 7-18
Author(s):  
Verónica Jiménez-López ◽  
Anibal Luna-León ◽  
Stefano Benni ◽  
Gonzalo Bojórquez-Morales
Keyword(s):  
Energy Efficient ◽  
Optimum Temperature ◽  
Indoor Temperature ◽  
Wine Production ◽  
Bioclimatic Design ◽  
Basic Model ◽  
Temperature Ranges ◽  
Hygrothermal Environment ◽  
Design Options ◽  
Correct Design

Greater amount of energy consumed in wineries is used for cooling and humidifying of the interior, for this reason the correct design of energy efficient wineries has become an important issue for winemaking countries. The purpose of the design of buildings that require less or no energy to achieve controlled conditions of the indoor hygrothermal environment for production and aging of wine, allowed to formulate the objective of this work, which was to evaluate six models of wineries with bioclimatic design located in El Valle de Guadalupe, Baja California from data on thermal performance (indoor temperature and relative humidity) and energy consumption (kWh and degrees-hour), obtained by dynamic thermal simulation. The zone of the study was characterized, based on the review of previous studies optimum temperature ranges were defined for aging and wine production. A basic model of a winemaking building was designed to which bioclimatic strategies were applied. The results obtained allowed to suggest the best bioclimatic design options for this type of buildings.

scholarly journals Relation between indoor thermal environment and renovation in liege residential buildings

2014 ◽  
Vol 18 (3) ◽  
pp. 889-902 ◽  
Author(s):  
Manoj Singh ◽  
Sadhan Mahapatra ◽  
Jacques Teller
Keyword(s):  
Indoor Environment ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Area Ratio ◽  
Building Envelope ◽  
Efficiency Improvement ◽  
Environment Monitoring ◽  
Indoor Temperature ◽  
Indoor Thermal Environment ◽  
Energy Efficiency Improvement

Indoor thermal environment monitoring has been done in 20 residential buildings of Liege city followed by questionnaire based comfort survey amongst the occupants of 85 houses in order to record their preference and expectations about indoor thermal environment in winter and spring season. It is found from the analysis that change of glazing has a minimum or even sometimes an adverse effect on the existing indoor environment due to the absence of proper insulation of the rest of the building envelope. It is observed that in winter there is a sudden drop in indoor temperature and also overheating in summer. This is due to unplanned installation of glazing which actually increases the fenestration area ratio leading to higher indoor temperature fluctuation and causes discomfort. It is also important that the occupant?s preference and expectations as well as overall assessment of indoor environment needs to be consider towards energy efficiency improvement.

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