Application of PCMs to Improve Energy Efficiency in Residential Buildings

2021 ◽  
pp. 1-12
Author(s):  
Vincenzo Bianco ◽  
Annalisa Marchitto ◽  
Federico Scarpa ◽  
Luca A. Tagliafico
Keyword(s):  
Energy Efficiency ◽  
Residential Buildings ◽  
Improve Energy Efficiency

scholarly journals Application of Rough Set Theory (RST) to Forecast Energy Consumption in Buildings Undergoing Thermal Modernization

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1309 ◽  
Author(s):  
Tomasz Szul ◽  
Stanisław Kokoszka
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Set Theory ◽  
Rough Set ◽  
Energy Demand ◽  
Rough Set Theory ◽  
Residential Buildings ◽  
Simple Procedure ◽  
Energy Performance ◽  
Improve Energy Efficiency

In many regions, the heat used for space heating is a basic item in the energy balance of a building and significantly affects its operating costs. The accuracy of the assessment of heat consumption in an existing building and the determination of the main components of heat loss depends to a large extent on whether the energy efficiency improvement targets set in the thermal upgrading project are achieved. A frequent problem in the case of energy calculations is the lack of complete architectural and construction documentation of the analyzed objects. Therefore, there is a need to search for methods that will be suitable for a quick technical analysis of measures taken to improve energy efficiency in existing buildings. These methods should have satisfactory results in predicting energy consumption where the input is limited, inaccurate, or uncertain. Therefore, the aim of this work was to test the usefulness of a model based on Rough Set Theory (RST) for estimating the thermal energy consumption of buildings undergoing an energy renovation. The research was carried out on a group of 109 thermally improved residential buildings, for which energy performance was based on actual energy consumption before and after thermal modernization. Specific sets of important variables characterizing the examined buildings were distinguished. The groups of variables were used to estimate energy consumption in such a way as to obtain a compromise between the effort of obtaining them and the quality of the forecast. This has allowed the construction of a prediction model that allows the use of a fast, relatively simple procedure to estimate the final energy demand rate for heating buildings.

scholarly journals Application Of Sustainable Design Principles To Increase Energy Efficiency Of Existing Buildings

2014 ◽  
Vol 61 (3) ◽  
pp. 167-177 ◽  
Author(s):  
B. Mansoury ◽  
H. R. Tabatabaiefar
Keyword(s):  
Energy Efficiency ◽  
Thermal Performance ◽  
Sustainable Design ◽  
Residential Buildings ◽  
Construction Materials ◽  
Design Principles ◽  
Existing Buildings ◽  
Performance Study ◽  
Improve Energy Efficiency ◽  
The Impact

Abstract This study investigates the effectiveness of different energy retrofitting techniques and examines the impact of employing those methods on energy consumption of existing residential buildings. Based on the research findings, the most effective and practical method of retrofitting has been proposed in order to improve energy efficiency of existing buildings. In order to achieve this goal, an existing residential building has been simulated in FirstRate 5 software so as to determine the existing thermal performance of the building. Afterwards, considering sustainable design principles, different insulation layers, glazing, and construction materials have been employed to conduct a comprehensive thermal performance study. Based on the research outcomes, the best technique for increasing energy efficiency of existing buildings and reducing their environmental impact and footprint has been identified and proposed for practical purposes.

scholarly journals The Strategy of Implementing Energy Efficiency Standards and Labels for Domestic Air Conditioners in Libya

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Salah M Alabani ◽  
Ibrahim H Tawil
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Savings ◽  
Residential Buildings ◽  
Total Energy Consumption ◽  
Air Conditioners ◽  
Improve Energy Efficiency ◽  
Reduce Energy Consumption ◽  
Two Stages ◽  
Energy Efficiency Standards

The residential sector in Libya has grown over the past decade in the construction of residential buildings due to the increase in the population. Moreover, the increase in the level of income has contributed to the increase in the purchase of household appliances, which leads to increased demand for energy. Energy consumption in the household sector accounted for 31% of total energy consumption during 2010, and the share of air conditioners in this sector consumed 18.35%. To reduce energy consumption and improve energy efficiency in this sector, policies should be considered to apply energy efficiency standards and markers to household electrical appliances, as they are considered one of the most successful programs used in the world. Countries are implementing such programs to reduce energy consumption in the domestic sector. This paper presents the possibility of implementing such programs to introduce the importance of energy efficiency standards and labeling programs for home appliances in Libya. The calculations required to design such programs show the energy savings that can be achieved during cooling loads in the summer period of 4 months July, August, September). A strategic plan has been developed during 10-year (2020-2030) to estimate the expected savings of energy consumed and to identify possible obstacles and difficulties by gradually increasing the energy efficiency ratio for comestic air conditioners in two stages, from EER10 to EER11 in the first stage is then raised to EER12 as the second stage.

scholarly journals Use of Insulation Based on Nanomaterials to Improve Energy Efficiency of Residential Buildings in a Hot Desert Climate

2021 ◽  
Vol 13 (9) ◽  
pp. 5266
Author(s):  
Ahmed Abdelrady ◽  
Mohamed Hssan Hassan Abdelhafez ◽  
Ayman Ragab
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Effective Means ◽  
Polystyrene Foam ◽  
Improve Energy Efficiency ◽  
Building Insulation ◽  
Clear Glass ◽  
Desert Climate

Building insulation based on nanomaterials is considered one of the most effective means of reducing energy consumption in the hot desert climate. The application of an energy-efficient insulation system can significantly decrease the energy consumed via a building’s air-conditioning system during the summer. Hence, building insulation has become an interesting research topic, especially with regards to the use of insulation based on nanomaterials due to their low U-values. In the present study, the use of nano vacuum insulation panels (VIPs) or polystyrene foam in the walls enabled a significant reduction in the annual energy consumption, a savings of 23% compared to the uninsulated wall in a study in New Aswan City. The application of nanogel glazing to the windows (two layers of clear glass filled with the nanogel) achieved approximately 11% savings in annual energy. This savings, twice that obtained by using double-glazed windows, could be due to the low U-value of nanogel compared to the U-values of argon or air. The embedded nanogel layer between two layers of argon and two layers of single clear glass showed a significant reduction in annual energy consumption, saving 26% compared to the use of a single layer of glass. Moreover, the integration between this window and embedded walls with 50 mm of polystyrene foam exhibited a significant improvement of energy efficiency by 47.6% while presenting the lowest value of simple payback period (SPP). This research provides a way for buildings to be insulated to make them more energy efficient as well as attractive from the economic standpoint.

scholarly journals Problems and disadvantages of the existing evaluation system of thermomodernization projects of construction objects

2021 ◽  
Vol 1 (47) ◽  
pp. 119-128
Author(s):  
І.V. Vahovich ◽  
A.S. Maximov ◽  
І.О. Ostapenko ◽  
D.V. Bogatyuk ◽  
D.P. Kalashnikov
Keyword(s):  
Energy Efficiency ◽  
Evaluation System ◽  
Construction Projects ◽  
Residential Buildings ◽  
Technical Condition ◽  
Topical Issue ◽  
Energy Audit ◽  
Design Work ◽  
Improve Energy Efficiency ◽  
Technical And Economic Indicators

The article considers the topical issue of thermal modernization of residential buildings and social facilities is an important area of research, but in the implementation of such projects there are many obstacles of organizational and administrative nature, which currently hinder the implementation of projects to improve energy efficiency of buildings and structures. and the systematization of which will allow to develop measures to eliminate existing barriers, and thus improve the attractiveness and accessibility of thermal modernization projects for the population and other stakeholders. The main stages of thermal modernization are systematized in accordance with the provisions of the current legislative and regulatory framework, the place of thermal modernization measures in the sequence of implementation of investment and construction projects is determined. It is determined that the main types of construction in which thermal modernization is carried out are capital repairs, reconstruction and technical re-equipment, but thermal modernization measures can be carried out during the current repair. Current repairs are not a type of construction, and therefore it is not subject to laws and regulations in the field of construction, and therefore the organization and implementation of such works from the standpoint of the requirements of legislation and regulations is the simplest. The following obstacles and barriers were identified during the development of the thermal modernization project, namely: the order of performance of the technical condition survey and energy audit is not legally established (in practice these are two unrelated actions, the result of which are not related technical reports analyzed by the designer. design), the stages of thermal modernization are not linked to a single methodology, given in separate documents, and therefore require special professional knowledge, not sufficiently reflected stages of preparation of thermal modernization at the stage of pre-design work, while at this stage decisions must be made , providing the required level of energy efficiency for the customer, technical and economic indicators of the project.

scholarly journals Investment attractiveness of energy saving measures

2020 ◽  
Vol 220 ◽  
pp. 01010
Author(s):  
Arsen Tleppayev ◽  
Assel Azhibayeva
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Residential Buildings ◽  
Energy Resources ◽  
Operating Costs ◽  
Innovative Development ◽  
Improve Energy Efficiency ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Efficiency Measures

The problem of energy efficiency of buildings is especially relevant in Kazakhstan. According to the state policy of innovative development of national economy, in recent decades, it has been necessary to solve the problems of saving energy resources, introducing renewable energy technologies and increasing energy efficiency. One of the most important issues of energy saving and energy efficiency is the problem of sustainable functioning and innovative development of housing and communal services in Kazakhstan, which is directly related to the modernization of residential buildings in order to reduce operating costs and improve energy efficiency. Analysis and study of economic approaches to financing energy efficiency measures are especially important in the framework of almost implemented projects for the modernization of housing and communal services.

scholarly journals A Multi-Facet Retrofit Approach to Improve Energy Efficiency of Existing Class of Single-Family Residential Buildings in Hot-Humid Climate Zones

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1178 ◽  
Author(s):  
Amoah B.O. Kwame ◽  
Nguyen V. Troy ◽  
Najafi Hamidreza
Keyword(s):  
Energy Efficiency ◽  
Cost Effectiveness ◽  
Energy Savings ◽  
Residential Buildings ◽  
Building Envelope ◽  
Single Family ◽  
Data Mining Technique ◽  
Humid Climate ◽  
Improve Energy Efficiency ◽  
Hot Humid Climate

Targeting existing residential buildings for retrofit improvement presents significant prospects for global reduction of energy-usage and carbon footprints. Energy consumption of the existing single-family building in the hot-humid climate zone needs to be targeted for improvement due to their potential energy-savings and sizeable market share. This paper proposes and evaluates energy savings and cost-effectiveness of a whole building retrofit package for single-family residential buildings built between 1950 and 1970. The study outlined a survey conducted using the clustering data mining technique on Florida Single-Family Residential (SFR) homes to determine the essence of the building envelope, patterns of construction, and Heating, Ventilation, and Air-Conditioning (HVAC) systems. The evaluation of the energy efficiency measures (EEMs) effectiveness is performed utilizing Autodesk Revit and a Six-Step modeled framework. This framework consists of baseline model development, validation of the model with an actual case study building, identification of potential EMMs, evaluation of EEMs individually and incorporating the selected EMMs into retrofit package and maximizing the energy-saving and cost-effectiveness of the proposed retrofit package. The study develops proposed retrofit improvement package detailing replacement & improvement EEMs, implementation cost, annual energy savings (kWh), cost-saving ($), and payback period (years) for each individual EEM as well as the combined/total energy improvement package. The paper further explored the usage of solar photovoltaics (PV) energy generation options to offset the remaining energy-use after the implementation of the proposed retrofit package.

scholarly journals Application of the Takagi-Sugeno Fuzzy Modeling to Forecast Energy Efficiency in Real Buildings Undergoing Thermal Improvement

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1920
Author(s):  
Tomasz Szul ◽  
Krzysztof Nęcka ◽  
Stanisław Lis
Keyword(s):  
Energy Efficiency ◽  
Prediction Models ◽  
Residential Buildings ◽  
Data Sets ◽  
Improve Energy Efficiency ◽  
Rough Sets Theory ◽  
Thermal Improvement ◽  
Input Variables ◽  
American Society ◽  
Takagi Sugeno

Energy efficiency in the building industry is related to the amount of energy that can be saved through thermal improvement. Therefore, it is important to determine the energy saving potential of the buildings to be thermally upgraded in order to check whether the set targets for the amount of energy saved will be reached after the implementation of corrective measures. In real residential buildings, when starting to make energy calculations, one can often encounter the problem of incomplete architectural documentation and inaccurate data characterizing the object in terms of thermal (thermal resistance of partitions) and usable (number of inhabitants). Therefore, there is a need to search for methods that will be suitable for quick technical analysis of measures taken to improve energy efficiency in existing buildings. The aim of this work was to test the usefulness of the type Takagi-Sugeno fuzzy models of inference model for predicting the energy efficiency of actual residential buildings that have undergone thermal improvement. For the group of 109 buildings a specific set of important variables characterizing the examined objects was identified. The quality of the prediction models developed for various combinations of input variables has been evaluated using, among other things, statistical calibration standards developed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). The obtained results were compared with other prediction models (based on the same input data sets) using artificial neural networks and rough sets theory.

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