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 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 Target Setting Outlook for New Residential Building Energy Efficiency Promotion in China: A Frontline Perspective Using Delphi

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1629
Author(s):  
Yinan Li ◽  
Neng Zhu ◽  
Beibei Qin
Keyword(s):  
Energy Efficiency ◽  
Evaluation System ◽  
Energy Intensity ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Energy ◽  
Successful Implementation ◽  
Building Energy Efficiency ◽  
Target Setting ◽  
Intensity Index

Promoting energy efficiency (EE) requirements for new residential buildings has been proven to be an effective way to slow down the rapid increase of energy consumption. Its successful implementation relies significantly on the attitudes and participation of various stakeholders within the industry, yet they are normally taken for granted. This paper explores and reports both the consensus among and the diversity of the attitudes of frontline stakeholders toward future EE requirements in the new residential building sector via a nationwide Delphi questionnaire distributed to 29 institutes and 25 experts. Results indicate that promotion of approximately 30% EE every five years until 2030 is suggested and that 20% EE promotion every five years is the most likely to be achieved. In addition, China should progressively adopt the energy intensity index into the current building EE evaluation system. This paper also gives a detailed description of opinions from frontline stakeholders. The findings are expected to help researchers and policymakers better understand the true attitudes of stakeholders, thereby enabling the formation of a proper outlook for new residential building EE promotion.

A Study on the Energy-Saving Evaluation Index System of Rural Residential Buildings

2014 ◽  
Vol 507 ◽  
pp. 469-474
Author(s):  
Hui Min Li ◽  
Ao Jun Wang ◽  
Sheng Xing Yin ◽  
Meng Sha
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Index System ◽  
Evaluation System ◽  
Residential Buildings ◽  
Assessment System ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Analytic Hierarchy ◽  
Expert Opinions

Currently, energy-saving building is a hot topic in society, which is also generally recognized as the most direct and effective way with the greatest potential for energy saving in the industry when the energy problem has become increasingly urgent today. At present, the domestic scholars less focus on rural residential energy saving, so the energy efficiency assessment on countryside buildings is still a relatively new field. This paper introduced existing energy-saving building assessment system at home and abroad through referring to the domestic and overseas existing assessment system, combining the characteristics of energy efficiency of rural residential buildings in China, constructed the energy-saving evaluation index system of rural residential buildings. Expert opinions and analytic hierarchy process (AHP) were used to determine the index weight, and the rationality of the evaluation system was determined by an empirical analysis case.

Increase the Energy Efficiency of the Multi-Story Apartment Building

2015 ◽  
Vol 725-726 ◽  
pp. 1395-1401 ◽  
Author(s):  
Nikolay Vatin ◽  
Darya Nemova ◽  
Yulia Ibraeva ◽  
Philipp Tarasevskii
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Residential Building ◽  
Heating System ◽  
Economic Feasibility ◽  
Energy Audit ◽  
Apartment Building ◽  
Improve Energy Efficiency ◽  
Consumption Data ◽  
Technical Measures

The article presents a structural analysis of the energy consumption of multi-story residential building, which based on analysis of the actual data flow and heat consumption data and energy audit for assessing the condition of the heating system. Methods been proposed to improve energy efficiency. The calculation shows the need and economic feasibility of the implementation of organizational and technical measures proposed in the article.

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 EVALUATION OF ENERGY SAVING POTENTIAL ON THE BASIS OF ENERGY AUDIT

2016 ◽  
Vol 1 (12) ◽  
pp. 89-94 ◽  
Author(s):  
Косухин ◽  
Andrey Kosukhin ◽  
Косухин ◽  
Mikhail Kosukhin ◽  
Семак ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Residential Buildings ◽  
Necessary Condition ◽  
Housing Sector ◽  
Efficiency Improvement ◽  
Energy Audit ◽  
Energy Saving Potential ◽  
Energy Efficiency Improvement ◽  
Existing Housing

There were presented the findings of the research in energy saving and energy efficiency of public and residential buildings with the purpose of evaluating the energy saving potential on the basis of energy audit. There was demonstrated the nature of energy consumption and the evaluation figures of energy saving in state-financed sphere and housing sector of the country. On the basis of research and calculations of various specialists it was determined, that the highest potential of energy efficiency improvement belongs to the housing funds of the country. It was pointed out that capital repairs and reconstruction of the existing housing funds are the necessary condition of implementing the energy saving measures. The investment issues, their types and their attractiveness for energy saving measures and improving the energy efficiency are reflected.

scholarly journals FEATURES OF THE ORGANIZATION OF THERMOMODERNIZATION PROJECTS

2020 ◽  
pp. 159-165
Author(s):  
Artem Maksymov ◽  
Oleksandr Halinskyi
Keyword(s):  
Cost Savings ◽  
Technical Condition ◽  
Energy Audit ◽  
Technical Data ◽  
Improve Energy Efficiency ◽  
Organization And Management ◽  
Technological Impact ◽  
Integrated Project ◽  
Number Of Publications ◽  
Construction Works

Organizational bases for the preparation and implementation of thermal modernization projects are defined by separate legislative acts and regulations, but they do not take into account certain features. Despite the sufficient number of publications on the solution of certain issues related to the thermal modernization of existing and new facilities, further research is needed in the organization and management of the processes of thermal modernization of existing facilities. As we have defined in previous publications, thermal modernization can be carried out during various types of construction - reconstruction, overhaul, technical re-equipment, but in contrast to these types of construction can be carried out without relocation of residents or suspension of operation of other facilities. time of construction works or its parts (provided they are autonomous). One of the first stages of thermal modernization is the inspection of the technical condition of the object, which determines the list of measures necessary to restore its normal serviceability. Significant costs for these measures may lead to the rejection of the idea of thermal modernization or the involvement of other than cost savings for energy consumption of the facility. The current regulations provide for the inspection of the building before or during the energy audit, but does not explicitly state that the development of thermal modernization measures should take into account the measures developed at the stage of technical inspection, as they have a constructive and technological impact. combined into a single integrated project. The article presents the procedure for organizing the preparation of the thermal modernization project is presented. The organization of preparation of projects to improve energy efficiency should primarily ensure the reliability of calculations of environmental and economic efficiency of the project, depending on the reliability of technical data and calculations collected and identified at different stages of its preparation depending on systematization and their consistent collection.

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