scholarly journals ARCHITECTURAL ENGINEERING IN REHABILITATION AT SOCIAL HOUSING QUARTERS

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Vitor Abrantes ◽  
Nuno Abrantes ◽  
Fernando Brandão Alves
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Social Housing ◽  
Self Esteem ◽  
Building Envelope ◽  
Rain Water ◽  
High Quality ◽  
Increase Energy Efficiency ◽  
Architectural Engineering

The rehabilitation of social housing quarters is done with the purpose to answer three central questions: (1) to solve the existing anomalies that are often caused by rain water infiltrations through the vertical's building envelope and also through roof, condensation caused by the lack of insulation and poor existent ventilation and existing cracks in building's facades; (2) to improve thermal comfort and increase energy efficiency of the buildings; (3) to increase the satisfaction and self-esteem of the residents promoting a modern and also high quality architectural intervention at social housing quarters. This study will describe the executed solutions for the rehabilitation of this three social housing quarters, three of the biggest social quarters of the Oporto region, each one with a different intervention in the building envelope.

Possible Solutions for Ground Slabs of Energy Efficient Buildings

2014 ◽  
Vol 1041 ◽  
pp. 105-108
Author(s):  
Anna Sedláková ◽  
Pavol Majdlen ◽  
Ladislav Ťažký
Keyword(s):  
Energy Efficiency ◽  
Heat Flow ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Direct Contact ◽  
Thermal State ◽  
Building Envelope ◽  
Heat Losses ◽  
Internal Environment ◽  
Energy Efficient Buildings

The building envelope is a barrier that separates the internal environment from the effects of weather. This barrier ought to facilitate the optimal comfort of the interior environment in winter as well as summer. It has been shown in practice that most building defects occur within the building envelope. This includes external walls, roofs and floors too, and is impartial to new or renovated buildings. Heat losses of buildings through external constructions – roof, external walls, ground slabs are not negligible. It is therefore important to pay more attention to these construction elements. Basementless buildings situated on the ground are in direct contact with the subgrade and its thermal state. An amount of heat primarily destined for the creation of thermal comfort in the interior escapes from the baseplate to the cooler subgrade. The outgoing heat represents heat losses, which unfavourably affect the overall energy efficiency of the building. The heat losses represent approximately 15 to 20 % of the overall heat losses of the building. This number is a clear antecedent for the need to isolate and minimalize heat flow from the building to the subgrade.

scholarly journals Glass Curtain Wall Technology and Sustainability in Commercial Buildings in Auckland, New Zealand

2020 ◽  
Vol 7 (2) ◽  
pp. 57-65
Author(s):  
Yi Wu ◽  
Claire Flemmer
Keyword(s):  
Energy Efficiency ◽  
New Zealand ◽  
Thermal Comfort ◽  
Environmental Sustainability ◽  
High Energy ◽  
Building Envelope ◽  
Commercial Buildings ◽  
Continuous Heating ◽  
Curtain Wall ◽  
Glass Curtain Wall

Glass curtain wall provides an attractive building envelope, but it is generally regarded as unsustainable because of the high energy needed to maintain thermal comfort. This research explores the advances in the technology of glass cladding and the complex issues associated with judging its sustainability. It assesses the technology and sustainability of glass curtain wall on a sample of thirty commercial buildings in Auckland, New Zealand. Field observations of the glass-clad buildings, coupled with surveys of the building occupants and of glass cladding professionals are used to investigate the cladding characteristics, operational performance, sustainability aspects and future trends. The majority of the sample buildings are low-rise office buildings. The occupants like the aesthetics and indoor environment quality of their glass-clad buildings. However, continuous heating, ventilation and air conditioning are needed in order to maintain thermal comfort within the buildings and this has high energy consumption. The increasing use of unitized systems with double glazing instead of stick-built systems with single glazing improves the sustainability of the cladding through less material wastage and better energy efficiency. Inclusion of photovoltaic modules in the curtain wall also improves energy efficiency but it is currently too expensive for use in New Zealand. Environmental sustainability is also improved when factors such as climate, the orientation of glazed façades, solar control, ventilation and the interior building layout are considered. Any assessment of glass curtain wall sustainability needs to consider the economic and social aspects as well as the environmental aspects such as energy use

Rural Living Energy Status and Analysis of Southern Inner Mongolia

2014 ◽  
Vol 962-965 ◽  
pp. 1818-1822
Author(s):  
Guang Qiang Liu ◽  
Zi Qiang Lv ◽  
Xi Liang Wang ◽  
Ge Ge Shao
Keyword(s):  
Energy Efficiency ◽  
Inner Mongolia ◽  
Residential Building ◽  
Building Envelope ◽  
Energy Status ◽  
Increase Energy Efficiency ◽  
Rural Living ◽  
Heat Preservation

Compared with urban mode of consuming energy, rural has its own characteristics. Rural typical residential building envelope was studied to explore improvement methods and increase energy efficiency in southern Inner Mongolia by analysis the type of structure, material and the heat preservation measures.

scholarly journals Complex analysis of energy efficiency in operated high-rise residential building: Case study

2018 ◽  
Vol 33 ◽  
pp. 02005 ◽  
Author(s):  
Sergey Korniyenko
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Thermal Comfort ◽  
Complex Analysis ◽  
Residential Building ◽  
Building Energy ◽  
Building Envelope ◽  
Heat Losses ◽  
High Rise

Energy conservation and human thermal comfort enhancement in buildings is a topical issue of modern architecture and construction. The innovative solution of this problem makes it possible to enhance building ecological and maintenance safety, to reduce hydrocarbon fuel consumption, and to improve life standard of people. The requirements to increase of energy efficiency in buildings should be provided at all the stages of building's life cycle that is at the stage of design, construction and maintenance of buildings. The research purpose is complex analysis of energy efficiency in operated high-rise residential building. Many actions for building energy efficiency are realized according to the project; mainly it is the effective building envelope and engineering systems. Based on results of measurements the energy indicators of the building during annual period have been calculated. The main reason of increase in heat losses consists in the raised infiltration of external air in the building through a building envelope owing to the increased air permeability of windows and balcony doors (construction defects). Thermorenovation of the building based on ventilating and infiltration heat losses reduction through a building envelope allows reducing annual energy consumption. Energy efficiency assessment based on the total annual energy consumption of building, including energy indices for heating and a ventilation, hot water supply and electricity supply, in comparison with heating is more complete. The account of various components in building energy balance completely corresponds to modern direction of researches on energy conservation and thermal comfort enhancement in buildings.

Contributions Regarding the Energy Efficiency Increasing for a Hotel Building in order to Ensure a Healthy Indoor Environment

2018 ◽  
Vol 880 ◽  
pp. 329-334
Author(s):  
Mădălina Xenia Călbureanu ◽  
Raluca Malciu ◽  
Calin Mihnea Calbureanu
Keyword(s):  
Energy Efficiency ◽  
Active Role ◽  
Energy Performance ◽  
Building Envelope ◽  
Outdoor Environment ◽  
Pollutant Emissions ◽  
Indoor Climate ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Wide Range

This paper purpose is to provide recommendations after a thermal energy analysis and inspection of a hotel building and its related facilities, in order to increase energy efficiency saving primary resources, to ensure a healthy indoor climate for users, and last but not least to ensure a reduction of CO2 emissions in order to ensure an external environment with low pollutant emissions. All the carried out analysis has as main objective to consider a symbiosis between all the parameters involved (energy, indoor/outdoor environment, comfort), when a building (envelope and installations) is renovated, especially when excess in order to save energy tend to endanger the indoor climate. Non-invasive methods were used to inspect the building by using thermo-vision both for the building envelope and for inspection of existing installations. The building utilities bills were analyzed for a period of one year to highlight current energy performance. The given recommendations achieve the proposed goal and highlight the active role of building management, continuous monitoring of energy and utilities to assess and improve energy efficiency, and ultimately to minimize specific energy costs. The results of this study can be used successfully on a wide range of hotel buildings in Romania.

scholarly journals The Importance of In Situ Characterisation for the Mitigation of Poor Indoor Environmental Conditions in Social Housing

2021 ◽  
Vol 13 (17) ◽  
pp. 9836
Author(s):  
Rui Oliveira ◽  
Romeu Vicente ◽  
Ricardo M. S. F. Almeida ◽  
António Figueiredo
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Indoor Air ◽  
Environmental Conditions ◽  
Social Housing ◽  
Air Permeability ◽  
Building Stock ◽  
Monitoring Campaign

The energy efficiency improvements in existing buildings have become priority concerns of the European Union to encourage energy efficiency amongst residents and buildings as well as facility managers. The characterisation of the building stock plays an important role in the definition of energy renovation strategies. In Portugal, there are over 120,000 social housing flats. This paper focused on the holistic characterisation of a social housing neighbourhood concerning the “in situ” assessment of the indoor environmental conditions and thermal comfort over one year as well as air permeability tests of the flats and evaluation of the energy consumption. The hygrothermal monitoring campaign was carried out using thermo-hygrometer sensors to record the indoor air temperature and relative humidity of a large number of flats over a 12-month period. The airtightness of these flats was determined resourcing fan pressurisation test (blower door test). A relationship between the users’ modifications in the flats and their consequence over the air permeability was pursued and the importance of balconies and exhaust fans for the flats’ air permeability was discussed. The hygrothermal monitoring campaign of the case study was carried out, in order to assess the indoor thermal comfort according the ASHRAE 55 standard. The results show a significant discomfort rate, suggesting that the users are living in unhealthy environmental conditions and the issues that most contribute to the poor indoor environmental conditions that characterise this building stock. In addition, the energy, gas, and water consumption of the flats were collected, and a statistical analysis was performed. Correlations between the variables were observed and two clusters were identified. Cluster 1 includes the lower energy consumption flats, but no real impact on the thermal comfort was found as the entire dataset presented low indoor air temperatures.

Contributions Regarding the Implementation Nzeb Concept in Existing Public Buildings

2020 ◽  
Vol 896 ◽  
pp. 329-336
Author(s):  
Mădălina Xenia Călbureanu ◽  
Raluca Malciu ◽  
Diana Mara Calbureanu ◽  
Anca Mihaela Barbu
Keyword(s):  
Energy Efficiency ◽  
Active Role ◽  
Energy Performance ◽  
Building Envelope ◽  
Pollutant Emissions ◽  
Indoor Climate ◽  
Public Buildings ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Wide Range

This paper purpose is to provide recommendations for a public buildings – hospital - x in order to increase energy efficiency, saving primary resources, to ensure a healthy indoor climate for users, and last but not least to ensure a reduction of CO2 emissions in order to ensure an external environment with low pollutant emissions. After the thermal expertise of this building, the carried out analysis has as main objective to consider all the parameters involved (installations, insulations, indoor environment, comfort). Along with rehabilitation of a public building (envelope and installations), especially it is necessary to save energy but not to endanger the indoor climate. Non-invasive methods were used to inspect the building by using thermo-vision both for the building envelope and for inspection of existing installations. All the entering parameters such as utilities bills were analyzed for a period of one year to highlight current energy performance. The given recommendations achieve the proposed goal and highlight the active role of building management, continuous monitoring of energy and utilities to assess and improve energy efficiency, and ultimately to minimize specific energy costs. The results of this study can be used successfully on a wide range of hospital buildings in Romania.

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