scholarly journals Assessment of thermo-modernization in a multifamily building

2018 ◽  
Vol 49 ◽  
pp. 00004
Author(s):  
Małgorzata Basińska ◽  
Halina Koczyk ◽  
Aleksandra Błotnicka-Smyk
Keyword(s):  
Thermal Insulation ◽  
Residential Building ◽  
Heating System ◽  
Energy Performance ◽  
Performance Characteristics ◽  
Central Unit ◽  
The Real ◽  
Water Heaters ◽  
Electricity Costs

This paper presents an evaluation of thermo-modernisation improvements applied over the years in the multi-family residential building. Those improvements have included the civil and mechanical activities. The civil activities were as follows: the application of the thermal insulation on the external walls and replacement of the windows. The mechanical activities were mainly focused on an adjustment of the heating system to the new reduced heating demands of the building. The heating system in the building was modified - the radiators were replaced with the new ones, the heating central unit was modernised. Moreover the local gas water heaters were eliminated. Then the building’s energy performance characteristics, prepared according to the valid Polish methodology, were compared with the real consumption. It was found that after the application of thermo-modifications the heating demand was reduced, twice. The economy efficiency of the thermo-modernisation was evaluated by means of a method of the annual costs. The annual costs include the heating system exploitation costs, DHW preparation system and the auxiliary devices electricity costs.

scholarly journals In Situ Measurements of Energy Consumption and Indoor Environmental Quality of a Pre-Retrofitted Student Dormitory in Athens

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2210 ◽  
Author(s):  
Nikolaos Barmparesos ◽  
Dimitra Papadaki ◽  
Michalis Karalis ◽  
Kyriaki Fameliari ◽  
Margarita Niki Assimakopoulos
Keyword(s):  
Thermal Insulation ◽  
Social Impact ◽  
Ventilation System ◽  
Thermal Conditions ◽  
Heating System ◽  
Energy Performance ◽  
In Situ Measurements ◽  
Indoor Environmental Quality ◽  
Electrical Consumption

In the following years all European Union member states should bring into force national laws on the energy performance of buildings. Moreover, university campus dormitories are buildings of great importance, due to their architectural characteristics and their social impact. In this study, the energy performance along with the indoor environmental conditions of a dormitory of a university has been analysed. The in situ measurements included temperature, relative humidity, concentrations of carbon dioxide, total volatile organic compounds, and electrical consumption; lastly, the energy signature of the whole building was investigated. The study focused on the summer months, during which significantly increased thermal needs of the building were identified. The ground floor was found to be the floor with the highest percentage of thermal conditions within the comfort range, and the third floor the lowest. Lastly, a significant correlation between electrical consumption and the outdoor temperature was presented, highlighting the lack of thermal insulation. Overall, it was clear that a redesign of the cooling and heating system, the installation of a ventilation system, and thermal insulation are essential for improving the energy efficiency of this building.

Study Concerning the Thermal Insulation Panels with Double-Side Anti-Condensation Foil on the Exterior and Polyurethane Foam or Polyisocyanurate on the Interior

2015 ◽  
Vol 660 ◽  
pp. 244-248 ◽  
Author(s):  
Simon Pescari ◽  
Dan Tudor ◽  
Stefan Tölgyi ◽  
Carmen Maduta
Keyword(s):  
Energy Efficiency ◽  
Economic Impact ◽  
Polyurethane Foam ◽  
Thermal Insulation ◽  
Economic Efficiency ◽  
Heating System ◽  
Energy Performance ◽  
Mineral Wool ◽  
Building Envelope ◽  
Insulating Materials

The paper aims to assess the energy performance of a thermal rehabilitated ground floor building by using new thermal insulation panels with double-side anti-condensation foil on the exterior and polyurethane foam or polyisocyanurate on the interior (PUR or PIR) in various ways. The study also wants to emphasize the benefits of using these insulating materials encouraging their further use. Therefore, five scenarios are carried out, four thermal rehabilitation scenarios and the reference building scenario, without thermal insulation. The obtained results are evaluated by comparison. The results point out the energy performance of PUR and PIR used as thermal insulation panels for the building envelope but also the economic impact and the economic efficiency that involves using such panels. This work is based on the energy efficiency requirements targeting the building envelope and takes into account mainly the behavior of the envelope elements while the heating system is treated in a simplified manner, considering its usual efficiency. The conclusions highlight the main advantages of using these panels for buildings thermal rehabilitation compared to other common materials, such as polystyrene or mineral wool.

Energy performance of a solar hybrid collector system in a multistory apartment building

2005 ◽  
Vol 219 (1) ◽  
pp. 1-11 ◽  
Author(s):  
T T Chow ◽  
A L S Chan ◽  
K F Fong ◽  
W C Lo ◽  
C L Song
Keyword(s):  
Heating System ◽  
Energy Performance ◽  
Hot Water ◽  
Energy Output ◽  
Warm Climate ◽  
Apartment Building ◽  
Water Heaters ◽  
Collector System ◽  
Design Requirements ◽  
Water Collector

Solar co-generation applied in buildings has the advantage of increasing the energy output per unit installed collector area. This paper investigates a centralized photovoltaic and hot-water collector system that can serve as a water pre-heating system for a multistory apartment building in a warm climate region. Collectors are mounted on vertical facades. Electricity generated by the system is consumed by the circulation pumps and the water heaters. The facade integration, together with the heat and electricity co-generation, are features embedding both active and passive solar technology. A numerical model that analyzes its energy performance in an apartment building in Hong Kong is described. The study has been based on practical design requirements. It is estimated that, with the use of amorphous-silicon hybrid collectors which cover two-thirds of the west- and south-facing facades, the system is able to support one-third of the thermal energy required for water heating.

scholarly journals Performance Characteristics of Breezhaler® and Aerolizer® in the Real-World Setting

2021 ◽  
Author(s):  
Mathieu Molimard ◽  
Ioannis Kottakis ◽  
Juergen Jauernig ◽  
Sonja Lederhilger ◽  
Ivan Nikolaev
Keyword(s):  
Real World ◽  
Performance Characteristics ◽  
The Real ◽  
Real World Setting

scholarly journals Energy Performance Assessment of Innovative Building Solutions Coming from Construction and Demolition Waste Materials

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1226
Author(s):  
Beatriz Fraga-De Cal ◽  
Antonio Garrido-Marijuan ◽  
Olaia Eguiarte ◽  
Beñat Arregi ◽  
Ander Romero-Amorrortu ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Energy Demand ◽  
Energy Savings ◽  
Flow Analysis ◽  
Weather Conditions ◽  
Energy Performance ◽  
Construction And Demolition Waste ◽  
The European Union ◽  
Demolition Waste ◽  
The Impact

Prefabricated solutions incorporating thermal insulation are increasingly adopted as an energy conservation measure for building renovation. The InnoWEE European project developed three technologies from Construction and Demolition Waste (CDW) materials through a manufacturing process that supports the circular economy strategy of the European Union. Two of them consisted of geopolymer panels incorporated into an External Thermal Insulation Composite System (ETICS) and a ventilated façade. This study evaluates their thermal performance by means of monitoring data from three pilot case studies in Greece, Italy, and Romania, and calibrated building simulation models enabling the reliable prediction of energy savings in different climates and use scenarios. Results showed a reduction in energy demand for all demo buildings, with annual energy savings up to 25% after placing the novel insulation solutions. However, savings are highly dependent on weather conditions since the panels affect cooling and heating loads differently. Finally, a parametric assessment is performed to assess the impact of insulation thickness through an energy performance prediction and a cash flow analysis.

scholarly journals Energy Rating of Buildings to Promote Energy-Conscious Design in Israel

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 59
Author(s):  
Abraham Yezioro ◽  
Isaac Guedi Capeluto
Keyword(s):  
Design Process ◽  
Architectural Design ◽  
Residential Building ◽  
Green Building ◽  
Energy Performance ◽  
Basic Unit ◽  
Design Stage ◽  
Design Decision ◽  
Rating Systems ◽  
New Buildings

Improving the energy efficiency of existing and new buildings is an important step towards achieving more sustainable environments. There are various methods for grading buildings that are required according to regulations in different places for green building certification. However, in new buildings, these rating systems are usually implemented at late design stages due to their complexity and lack of integration in the architectural design process, thus limiting the available options for improving their performance. In this paper, the model ENERGYui used for design and rating buildings in Israel is presented. One of its main advantages is that it can be used at any design stage, including the early ones. It requires information that is available at each stage only, as the additional necessary information is supplemented by the model. In this way, architects can design buildings in a way where they are aware of each design decision and its impact on their energy performance, while testing different design directions. ENERGYui rates the energy performance of each basic unit, as well as the entire building. The use of the model is demonstrated in two different scenarios: an office building in which basic architectural features such as form and orientation are tested from the very beginning, and a residential building in which the intervention focuses on its envelope, highlighting the possibilities of improving their design during the whole design process.

scholarly journals Energy Performance of a High-Rise Residential Building Using Fibre-Reinforced Structural Lightweight Aggregate Concrete

2020 ◽  
Vol 10 (13) ◽  
pp. 4489
Author(s):  
Zakaria Che Muda ◽  
Payam Shafigh ◽  
Norhayati Binti Mahyuddin ◽  
Samad M.E. Sepasgozar ◽  
Salmia Beddu ◽  
...  
Keyword(s):  
Residential Building ◽  
Green Building ◽  
Lightweight Aggregate ◽  
Energy Performance ◽  
Building Envelope ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
High Rise ◽  
Passive Design ◽  
Envelope Material

The increasing need for eco-friendly green building and creative passive design technology in response to climatic change and global warming issues will continue. However, the need to preserve and sustain the natural environment is also crucial. A building envelope plays a pivotal role in areas where the greatest heat and energy loss often occur. Investment for the passive design aspect of building envelopes is essential to address CO 2 emission. This research aims to explore the suitability of using integral-monolithic structural insulation fibre-reinforced lightweight aggregate concrete (LWAC) without additional insulation as a building envelope material in a high-rise residential building in the different climatic zones of the world. Polypropylene and steel fibres in different dosages were used in a structural grade expanded clay lightweight aggregate concrete. Physical and thermal properties of fibre reinforced structural LWAC, normal weight concrete (NWC) and bricks were measured in the lab. The Autodesk@Revit-GBS simulation program was implemented to simulate the energy consumption of a 29-storey residential building with shear wall structural system using the proposed fibre-reinforced LWAC materials. Results showed that energy savings between 3.2% and 14.8% were incurred in buildings using the fibre-reinforced LWAC across various climatic regions as compared with traditional NWC and sand-cement brick and clay brick walls. In conclusion, fibre-reinforced LWAC in hot-humid tropical and temperate Mediterranean climates meet the certified Green Building Index (GBI) requirements of less than 150 kW∙h∙m−2. However, in extreme climatic conditions of sub-arctic and hot semi-arid desert climates, a thicker wall or additional insulation is required to meet the certified green building requirements. Hence, the energy-saving measure is influenced largely by the use of fibre-reinforced LWAC as a building envelope material rather than because of building orientation.

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