scholarly journals Additional heat loss of jamb in enclosing structures

2021 ◽  
Vol 263 ◽  
pp. 03017
Author(s):  
Maria Samsonova ◽  
Elvira Semenova ◽  
Christina Kotova ◽  
Leonid Salogub
Keyword(s):  
Heat Flux ◽  
Energy Efficiency ◽  
Heat Loss ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Temperature Fields ◽  
Design Stage ◽  
Design Solution ◽  
Additional Heat ◽  
Aerated Concrete

One of the urgent problems today is to increase the energy efficiency of civil buildings. There is a need at the design stage to choose structures and design solutions that will compensate for the increasing consumption of energy resources in civil engineering. This article compares different building envelopes used in the construction of residential buildings: a volumetric block and a wall made of aerated concrete blocks. To determine the most energy efficient design solution construction is compared in different climatic regions. One of the most vulnerable places of a wall, from the point of view of energy efficiency, is a window jamb. In this article, an analysis is carried out to determine the construction with the lowest heat loss window jambs. Using the ELCUT software temperature fields and additional heat flux densities are calculated. According to the calculation, the proportion of heat loss due to window slope from heat loss according to the surface of the structure was determined. The heat flux density of the homogeneous section of the wall of the volume block is 1.28 times higher on average than in the aerated concrete wall. Regardless of the climatic conditions, the junction of the window jamb in buildings made of insulated panels of volumetric blocks is more energy efficient than the same junction in a building with aerated concrete walls.

scholarly journals THE INFLUENCE OF THE METHOD OF LAYING PIPELINES ON THE ENERGY EFFICIENCY OF THE HEATING NETWORK

2019 ◽  
Vol 10 (2) ◽  
pp. 59-66
Author(s):  
E. A Biryuzova ◽  
A. S Glukhanov
Keyword(s):  
Energy Efficiency ◽  
Heat Loss ◽  
Thermal Insulation ◽  
Thermal Energy ◽  
Great Influence ◽  
Temperature Fields ◽  
Insulation Material ◽  
Design Work ◽  
Heat Networks ◽  
Insulation Thickness

Through pipelines of heat networks, due to their large length, a large amount of thermal energy is lost. Identification of technical solutions related to improving the energy efficiency of heating networks is an urgent task at present. The article is devoted to the consideration of options for laying pipelines of heat networks during design work. In the conducted studies, two main methods of underground laying of pipelines of heat networks with the choice of the most energy-efficient, with minimal losses of thermal energy are considered. Channel and channelless laying methods are investigated with the same design features and technological conditions of operation of pipelines of heat networks using the same thermal insulation material. For each option, the required thickness of the thermal insulation is determined by the normalized density of the heat flow, thermal calculations are performed to determine the heat loss and the value of the temperature fields generated around the operating pipelines of the heat networks. The obtained values of the thermal insulation thickness in the channel method of laying pipelines are 30-50 % lower than those in channelless laying. The heat loss values, according to the results of the heat calculation for the options under consideration, in the channel method of laying are reduced by 47-65 %. The temperature fields formed around the pipelines of thermal networks with channelless laying significantly exceed the natural value of the soil temperature at the depth of the pipeline. What has a great influence on the determination of the distance to adjacent pipelines and other utilities, laid underground, in the zone of the thermal network. A comparative analysis of the results obtained makes it possible to single out the choice of the method of laying the pipeline into a group of measures aimed at energy saving and increasing energy efficiency in heating systems.

scholarly journals ENERGY EFFICIENCY IN RESIDENTIAL BUILDINGS, LESS STRAIGHT FORWARD THEN PRESUMED

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Hugo Hens
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Energy Use ◽  
Low Voltage ◽  
Residential Buildings ◽  
Primary Energy ◽  
Heating And Cooling ◽  
Net Zero ◽  
Energy Conserving ◽  
New Construction

Since the 1990s, the successive EU directives and related national or regional legislations require new construction and retrofits to be as much as possible energy-efficient. Several measures that should stepwise minimize the primary energy use for heating and cooling have become mandated as requirement. However, in reality, related predicted savings are not seen in practice. Two effects are responsible for that. The first one refers to dweller habits, which are more energy-conserving than the calculation tools presume. In fact, while in non-energy-efficient ones, habits on average result in up to a 50% lower end energy use for heating than predicted. That percentage drops to zero or it even turns negative in extremely energy-efficient residences. The second effect refers to problems with low-voltage distribution grids not designed to transport the peaks in electricity whensunny in summer. Through that, a part of converters has to be uncoupled now and then, which means less renewable electricity. This is illustrated by examples that in theory should be net-zero buildings due to the measures applied and the presence of enough photovoltaic cells (PV) on each roof. We can conclude that mandating extreme energy efficiency far beyond the present total optimum value for residential buildings looks questionable as a policy. However, despite that, governments and administrations still seem to require even more extreme measurements regarding energy efficiency.

scholarly journals Energy efficiency of a passenger ship in Turkey

2020 ◽  
Vol XXIII (1) ◽  
pp. 15-21
Author(s):  
Aydɪn Tokuslu
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Performance Standards ◽  
Design Stage ◽  
Exhaust Gas ◽  
Passenger Ships ◽  
Exhaust Gas Emission ◽  
And Performance ◽  
Energy Efficiency Design Index ◽  
Harmful Effects

The International Maritime Organization (IMO) introduced a new measure in 2011 with a set of technical innovation and performance standards to increase the energy efficiency of new ships at the design stage and aim to reduce CO2 emissions. This new measure is called Energy Efficiency Design Index (EEDI) and this became a fast key instrument for the ships to be energy efficient. In this paper, one of the passenger ships in the Istanbul Strait was investigated and its emissions were estimated. The Energy Efficiency Design Index (EEDI) of the ship was calculated. EEDI formula equations based on the study of passenger ships have been compared with the IMO other ship equations and some useful proposals have been presented to reduce the harmful effects of CO2 exhaust gas emission.

scholarly journals Implementation of Energy Efficiency Management System in Multi-Storey Residential Houses in Littoral Regions of Latvia

2020 ◽  
Vol 8 (1) ◽  
pp. 1-11
Author(s):  
Baiba Pļaviņa ◽  
Gita Actiņa
Keyword(s):  
Energy Efficiency ◽  
Data Collection ◽  
Baltic Sea ◽  
Energy Efficient ◽  
Management System ◽  
Process Management ◽  
Residential Buildings ◽  
Efficient Solutions ◽  
The Baltic Sea ◽  
The Baltic

AbstractBased on EU guidelines and national development plans, energy efficient process management has been slowly implemented in Latvian regions in the context of the Directive 2012/27/EU putting forward two binding indicative national energy efficiency goals for Latvia: (1) to achieve 1.5 % of energy savings delivered to final consumers every year, and (2) to renovate 3 % of the state-owned buildings annually. The aim of the paper is to reflect the management system of energy efficient processes in public and residential buildings in Latvian littoral regions of the Baltic Sea, which can be an important factor for achieving the goals of the Directive. The paper presents the results of the research on energy efficient processes in public and residential buildings in Latvian littoral regions of the Baltic Sea in order to determine the existing challenges. Methods applied in the research are data collection, grouping, analysis and comparison, studies of regulatory documents, as well as statistical data collection and analysis. Contribution of the research is the improvement of energy efficient solutions in public and residential buildings in littoral regions of the Baltic Sea by using the estimated energy efficient processes. The results of the research are of international importance and can be applied not only in public and residential buildings in littoral regions of the Baltic Sea but also in other regions with similar climate or energy efficient process management problems in order to improve the selection of criteria of energy efficient solutions and renovation.

SOME ASPECTS OF ENERGY EFFICIENCY IN HOUSING CONSTRUCTION IN RUSSIA

2020 ◽  
Vol 13 (2) ◽  
pp. 90-96
Author(s):  
E.V. Nezhnikova ◽  
◽  
M.V Chernyaev ◽  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Real Estate ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Housing Construction ◽  
Residential Real Estate ◽  
Domestic Legislation

The article presents the problems of ensuring energy efficiency of housing construction in the Russian Federation. Unfortunately, for a variety of reasons and, despite the existence of federal and regional legislation, today Russia does not pay due attention to this issue, which leads to an unreasonable increase in electricity consumption both during the creation of residential real estate objects and during their operation. 96 Экономические системы. 2020. № 2 Economic Systems. 2020. No. 2 The relevance of the topic is enhanced by significant energy consumption of residential buildings in use: more than 50% of electrical energy consumption falls on these real estate objects. Therefore, it is no coincidence, but a completely logical trend of the 21st century, that the governments of most countries popularized the idea of designing and building energy-efficient residential buildings. It was established that the improvement of domestic legislation in terms of energy efficiency has greatly improved the regulatory framework for the design and construction of energy-efficient residential real estate.

Energy efficiency in housing and socio-economic development in Nigeria

2019 ◽  
pp. 238-243
Author(s):  
Albert Olotuah A ◽  
Rukayyatu Tukur B ◽  
Kingsley Dimuna O ◽  
Abiodun Olotuah O ◽  
Olutunde Adesiji S ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Economic Development ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Electricity Supply ◽  
Low Carbon ◽  
Design Strategies ◽  
Energy Efficient Buildings ◽  
Socio Economic Development

Energy efficient houses consume less energy while maintaining or improving the comfort conditions of occupants. Energy efficient buildings result in less environmental impact and are economically and environmentally sustainable. Residential buildings account for the majority of electricity consumption in Nigeria. Because of the poor state of energy generation and transmission in Nigeria energy efficiency measures are necessary to reduce the energy required in houses. This would substantially reduce the dependence on the grid electricity supply. Energy efficient buildings have tremendous benefits in social, economic, and environmental terms. In economic terms the production of energy-efficient buildings result in growing market demand with higher quality and innovative buildings, and in social terms it leads to improved urban space and local climate, and liveable buildings. Energy efficient buildings also ensure resource efficiency, and reduction of Green House Gas emissions. Energy efficiency in buildings starts from the design of buildings, and through to construction and operation. The objective of this paper is the examination of energy efficiency in housing in Nigeria and its impact upon socio-economic development in the country. The paper focuses on energy-efficient design strategies, and initiatives to achieve low carbon emission in housing in Nigeria The paper examines the housing situation in Nigeria and the phenomenon of urbanisation which has led to unplanned urban growth, grievous housing poverty, slum formation, and near collapse of urban services and infrastructure particularly electricity supply. It affirms the need to adopt energy efficiency in housing and it examines passive design strategies and low carbon initiatives in housing construction. It takes a critical look at the adoption of sustainability practices in housing. The paper asserts that energy efficiency would enhance the growth of electricity consumption and boost the socio-economic development of the country. The paper concludes that energy efficiency is capable of engendering socio-economic development of the country particularly productivity and income growth.

ANALYZING PLANNING SOLUTIONS FOR RESIDENTIAL BUILDINGS WITH ACCOUNT OF THEIR ENERGY EFFICIENCY

2015 ◽  
Vol 5 (4) ◽  
pp. 104-107
Author(s):  
Yuriy Pavlovich SOLOGUBOV ◽  
Tatyana Evgen'evna GORDEEVA
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Energy Performance ◽  
Heat Losses ◽  
Building Structures ◽  
Space Planning ◽  
Efficient Planning ◽  
Key Dimensions

The paper introduces the analysis of interrelation of a space planning solution with energy efficiency of building envelops and building structures insolation. The aim of the research is to find out an energy-efficient planning solution for a definite construction area, that of Samara city. The authors compare buildings key dimensions and introduce their energy performance certificates. Heat losses through front building envelops are also calculated. The paper concludes that from the standpoint of their energy efficiency corridor-type arrangements are preferable to tower blocks.

Distant Learning Course “Energy Efficient Refurbishment Management”

2014 ◽  
Vol 635-637 ◽  
pp. 2057-2062 ◽  
Author(s):  
Nikolay Vatin ◽  
Darya Nemova ◽  
Lina Khazieva ◽  
Daria Chernik
Keyword(s):  
Energy Efficiency ◽  
International Organizations ◽  
Energy Efficient ◽  
Housing Stock ◽  
Residential Buildings ◽  
International Level ◽  
Distant Learning ◽  
Efficiency Measures ◽  
Special Knowledge ◽  
New Buildings

Currently, a problem of the deterioration of housing stock exists and more and more buildings require reconstruction and renovation. Therefore, there is the need for specialists of the international level in the reconstruction and renovation of residential buildings in the labor market. To meet the need the distant learning course “Energy efficient refurbishment management” is offered. Implementation of the project is carried out by international organizations from different countries. The course is aimed at improving energy efficiency in new buildings and old residential buildings under the renovation in Russia, Belarus and Ukraine. The main objective of the project is the development of a program that will allow a manager to plan and implement energy efficiency measures of reconstruction. It is assumed that this course will be used both for self-education and for professional development and will be available for people who do not have special knowledge in this area. The program will provide the society with experts in the field of energy efficient renovation.

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 ACCOUNTING FOR THE INFLUENCE OF THE BUILDING SHAPE ON ITS ENERGY EFFICIENCY

2021 ◽  
Vol 112 ◽  
pp. 10-15
Author(s):  
M.V. Rubtsova ◽  
◽  
Е.Е. Semenova
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Saving ◽  
Heat Loss ◽  
Energy Efficient ◽  
Three Dimensional ◽  
Spatial Characteristics ◽  
Space Planning ◽  
Floor Area ◽  
Building Shape

The influence of building plan configurations in relation to their spatial characteristics on their energy consumption is considered. The article substantiates the relevance of the research of space-planning solutions of building forms, taking into account energy efficiency. As the object of research, the authors selected the most common three-dimensional configurations of building forms, taking into account energy efficiency. Examples of the analysis of the main space-planning parameters of the building and the prerequisites for their influence on its heat loss are considered with the provided graphic materials that allow you to find out the dependence of the change in the area of enclosing structures on the change in the floor area. This comparison is carried out in order to determine an energy-efficient and rationally arranged space-planning solution, taking into account the principles of energy saving for the construction of buildings.

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