scholarly journals ANALYSIS OF THE INFLUENCE OF ENERGY EFFICIENT HEATING MODES ON BUILDINGS ENERGY USE BASING ON THE MATHEMATICAL MODELING

2020 ◽  
Author(s):  
V. Deshko ◽  
I. Bilous ◽  
N. Buyak ◽  
O. Petruchenko
Keyword(s):  
Energy Efficiency ◽  
Mathematical Models ◽  
Energy Efficient ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Residential Building ◽  
Energy Performance ◽  
Heat Accumulation ◽  
Intermittent Heating ◽  
Building Engineering

Global trends of increasing the buildings energy efficiency are aimed at reducing energy use to nearly zero consumption (nZEB). Achieving the nZEB level requires the implementation of a set energy-saving measures to improve the thermophysical properties of fences, building engineering systems and the use of renewable energy sources. One of low-cost and energy-efficient measures to increase the level of energy efficiency of buildings is the introduction of energy-efficient intermittent heating modes of buildings. Usually, this measure is appropriate and possible after the thermal modernization of the building. Determining the energy performance of buildings for the introduction of intermittent heating modes requires the use of mathematical models. The paper compares the application of different mathematical models and methods for estimating thermal energy savings in thermal modernization and implementation of intermittent heating modes based on the quasi-stationary model according to DSTU B A.2.2-12: 2015, stadium model created on the basis of RETScreen software and dynamic model 5R1C according to EN ISO 13790 and EN 13786. Heat-accumulation properties of building enclosures in RETScreen are not taken into account, in DSTU B A.2.2-12: 2015 - are taken into account for external enclosures, 5R1C - both internal and external enclosures are taken into account. The calculation was made for a residential building and a gymnasium located in the city of Kyiv. The introduction of a set of measures for thermal modernization of building fences will reduce heat consumption by 60 and 35% for residential building reinforced and gymnasiums, respectively. Introduction of intermittent heating modes for buildings after thermal modernization / modern buildings allows to save on heating more than 15% - determined on the basis of RETScreen program, 10% - on the basis of dynamic grid model 5R1C, 22% - on the basis of quasi-stationary method according to DSTU B A.2.2- 12: 2015, for a residential building and a gymnasium building located in Kyiv.

Evaluation of Cooling, Heating, and Power (CHP) Systems Based on Building Energy-Rating

2007 ◽  
Author(s):  
N. Fumo ◽  
P. J. Mago ◽  
L. M. Chamra
Keyword(s):  
Energy Efficiency ◽  
Economic Analysis ◽  
Energy Efficient ◽  
Energy Use ◽  
Management Practices ◽  
Building Energy ◽  
Energy Performance ◽  
Energy Star ◽  
Star Rating ◽  
Energy Efficient Buildings

Cooling, Heating and Power (CHP) systems are a form of distributed generation that uses internal combustion prime-power engines to generate electricity while recovering heat for other uses. CHP is a promising technology for increasing energy efficiency through the use of distributed electric and thermal energy recovery-delivery systems at or near end-user sites. Although this technology seems to be economically feasible, the evaluation and comparison of CHP systems cannot be restricted to economical considerations only. Standard economic analysis, such as life cycle economic analysis, does not take in consideration all the benefits that can be obtained from this technology. For this reason, several aspects to perform a non-conventional evaluation of CHP systems have to be considered. Among the aspects to be included in a non-conventional evaluation are: power reliability, power quality, environmental quality, energy-efficient buildings, fuel source flexibility, brand and marketing benefits, protection from electric rate hikes, and benefits from promoting energy management practices. Some benefits of these non-economical evaluations can be transferred into an economic evaluation but others give intangible potential to the technology. This paper focus on a non-conventional evaluation based on energy-efficient buildings, which is associated to energy conservation and improvement of the building energy performance rating for government energy programs like Energy Star and Leadership in Energy and Environmental Design (LEED). Results show that the use of CHP systems could improve the Energy Star Rating in more than 50 points. The Energy Star Rating is significant on the LEED Rating as a building can score up to 10 points of the 23 available in the Energy & Atmosphere category on energy efficiency alone. As much as 8 points can be obtained in this category due to the Energy Star rating increment from the use of CHP systems. Clearly the use of CHP systems will help building owners to reach the benefits from these energy programs while improving the overall energy use and energy cost.

scholarly journals Toward efficient energy consumption in middle income housing buildings in Egypt

2020 ◽  
Vol 15 (2) ◽  
pp. 180-189
Author(s):  
Ibrahim Rizk Hegazy
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Energy Use ◽  
Energy Analysis ◽  
Weather Conditions ◽  
Energy Performance ◽  
Middle Income ◽  
Efficient Energy ◽  
Hot Weather ◽  
The Impact

Abstract Current research pays special attention to the application of approaches that promote sustainable design in a built environment and ensure energy efficiency. In this context, the form of housing buildings is an important parameter that has a meaningful impact on the use of energy in housing buildings. Hence, this research attempts to study the impact of the form of housing buildings on energy efficiency taking into account the mid-hot weather conditions in one of the middle-income housing buildings in new communities in Egypt. To achieve the research aim, a comparative analysis is carried out using parametric numerical analysis—DesignBuilder energy analysis—to compare the various hypothetical proposals for different building configurations. The study determines that the efficiency of energy use in buildings depends to a large extent on their forms that will help urban designers and planners to propose the best energy performance in the form of housing buildings in the stage of conceptual design suitable for other environmental, social and economic urban planning issues. These results should be incorporated into the building codes adopted in Egypt’s new cities in order to reach more energy-efficient housing buildings in Egypt.

A comparative meta-analysis of residential green building policies and their impact on overall energy consumption patterns

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Naim Jabbour
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Use ◽  
Energy Savings ◽  
Residential Building ◽  
Green Building ◽  
Energy Performance ◽  
Residential Energy ◽  
Residential Energy Consumption ◽  
The Eu

Data shows residential energy consumption constituting a significant portion of the overall energy end use in the European Union (EU), ranging between 15% and 30%. Furthermore, the EU’s dependency on foreign fossil fuel-based energy imports has been steadily increasing since 1993, constituting approximately 60% of its primary energy. This paper provides an analytical re-view of diverse residential building/energy policies in targeted EU countries, to shed insight on the impact of such policies and measures on energy use and efficiency trends. Accordingly, the adoption of robust residential green and energy efficient building policies in the EU has increased in the past decade. Moreover, data from EU energy efficiency and consumption databases attributes 44% of total energy savings since 2000 to energy upgrades and improvements within the residential sector. Consequently, many EU countries and organizations are continuously evaluating residential building energy consumption patterns to increase the sec-tor’s overall energy performance. To that end, energy efficiency gains in EU households were measured at 1% in 2000 compared to 27.8% in 2016, a 2600% increase. Accordingly, 36 policies have been implemented successfully since 1991 across the EU targeting improvements in residential energy efficiency and reductions in energy use. Moreover, the adoption of National Energy Efficiency Actions Plans (NEEACP) across the EU have been a major driver of energy savings and energy efficiency. Most energy efficiency plans have followed a holistic multi-dimensional approach targeting the following areas, legislative actions, financial incentives, fiscal tax exemptions, and public education and awareness programs and campaigns. These measures and policy instruments have cumulatively generated significant energy savings and measurable improvements in energy performance across the EU since their inception. As a result, EU residential energy consumption trends show a consistent decrease over the past decade. The purpose of this analysis is to explore, examine, and compare the various green building and energy-related policies in the EU, highlighting some of the more robust and progressive aspects of such policies. The paper will also analyze the multiple policies and guidelines across targeted European nations. Lastly, the study will assess the status of green residential building policies in Lebanon, drawing from the comprehensive European measures, in order to recommend a comprehensive set of guidelines to advance energy policies and building practices in the country. Keywords: Building Policies; Residential Energy Patterns; Residential Energy Consumption; Energy Savings

OPTIONS TO IMPROVE THE ENERGY EFFICIENCY OF THE BUILDING OF A PRIMARY SCHOOL IN SŁUBICE

2017 ◽  
Vol 166 (46) ◽  
pp. 36-47
Author(s):  
Marta Skiba ◽  
Natalia Rzeszowska
Keyword(s):  
European Union ◽  
Energy Efficiency ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Primary Energy ◽  
The European Union ◽  
Energy Characteristics ◽  
Current Guidelines

Climate change and sustainable energy use is one of the five long-term objectives of the European Union. The first stage of the activities involving the implementation of this task is to reduce energy consumption of buildings to a minimum by 2020 and, in the case of public buildings by 2019. The purpose of this article is a search for the optimal way of bringing the energy performance of an existing school to a level that enables implementation of the objectives of the European Union energy policy. An analysis of the current condition of the existing school building has been carried out and options of its deep thermal upgrading has been proposed to adjust each parameter the energy performance to current guidelines specified in the technical conditions. One of the possible ways to improve the energy efficiency of the school is the use of renewable energy sources as a means of improving energy characteristics in terms of primary energy PE, the other one - optimization of renovation spending.

Integration of Small Wind Energy Source for Optimization of Energy Efficiency in Residential Building

2014 ◽  
Vol 1041 ◽  
pp. 162-166
Author(s):  
Rastislav Ingeli ◽  
Eva Jankovichová ◽  
Minh Nguyen Tien ◽  
Miroslav Čekon
Keyword(s):  
Energy Source ◽  
Energy Efficiency ◽  
Renewable Energy ◽  
New Technologies ◽  
Housing Stock ◽  
Renewable Energy Sources ◽  
Residential Building ◽  
Energy Performance ◽  
Residential House ◽  
Key Indicators

According to current European strategy and effort, an integration of renewable energy sources (RES) applying of new technologies should have of crucial importance, especially with contribution to the energy efficiency optimizing in buildings. Concurrently, energy performance and energy consumption of the all housing stock is one of the key indicators that represent the adequate utility value of those efforts. The paper focuses on the proposal concept integration of renewable energy for residential house in relation to assessment of the building thermal and energy performance. The proposed concept applying of wind turbines is presented for residential building in terms of standardized target periods. Finally, payback period calculation demonstrates a certain potential of applying small wind turbine as a renewable energy source in residential building of recently given target periods of current technical regulation.

Solar radiation control passive strategy for reduction of heating and cooling energy use in arid climate: Case of Afghanistan

2021 ◽  
pp. 1420326X2110501
Author(s):  
Shambalid Ahady ◽  
Nirendra Dev ◽  
Anubha Mandal
Keyword(s):  
Developing Countries ◽  
Energy Efficient ◽  
Energy Use ◽  
Residential Building ◽  
Building Energy ◽  
Developed Countries ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Local Conditions ◽  
Energy Efficient Buildings

Buildings are significant consumers of energy and producer of greenhouse gases worldwide, and serious efforts have been put into designing energy-efficient buildings. Significant technological advances have been achieved in developed countries; however, advances have rarely been adopted in developing countries like Afghanistan. Such trends emerge from the lack of research in designing energy-efficient buildings to local conditions, practices and materials. This research focused on building energy modelling and simulation to evaluate the energy performance impact of different shading and orientation. The research design follows a case study over an actual seven-storey multi-apartment residential building in the city of Mazar-I-Sharif, Afghanistan, using primary field data and dynamic simulation. Findings demonstrated that neighbouring structures have a positive correlation with a cooling demand. Meanwhile, south is the optimal orientation to face the building's glazed façade, saving up to 7.4% of cooling and 9.7% of heating energy. Moreover, movable shading devices installed on the building's openings in the summer season reduce the building energy load up to 19%, with a total energy cost reduction of AFN. 188,448 ($2447.37 US) annually. The study underlines the vast research scope in customizing building designs to Afghanistan's climatic conditions and other developing countries, thus contributing to buildings’ sustainability.

Design Optimization of Energy Efficient Office Buildings in Tunisia

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Pyeongchan Ihm ◽  
Moncef Krarti
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
High Performance ◽  
Energy Use ◽  
Cost Effective ◽  
Energy Performance ◽  
High Energy ◽  
Office Buildings ◽  
Optimization Approach ◽  
Heating And Cooling

Optimal and cost-effective energy efficiency design and operation options are evaluated for office buildings in Tunisia. In the analysis, several design and operation features are considered including orientation, window location and size, high performance glazing types, wall and roof insulation levels, energy efficient lighting systems, daylighting controls, temperature settings, and energy efficient heating and cooling systems. First, the results of the optimization results from a sequential search technique are compared against those obtained by a more time consuming brute-force optimization approach. Then, the optimal design features for a prototypical office building are determined for selected locations in Tunisia. The optimization results indicate that utilizing daylighting controls, energy efficient lighting fixtures, and low-e double glazing, and roof insulation are required energy efficiency measures to design high energy performance office buildings throughout climatic zones in Tunisia. In particular, it is found that implementing these measures can cost-effectively reduce the annual energy use by 50% compared to the current design practices of office buildings in Tunisia.

scholarly journals Are LEED-Certified Buildings Energy-Efficient in Practice?

2019 ◽  
Vol 11 (6) ◽  
pp. 1672 ◽  
Author(s):  
Ali Amiri ◽  
Juudit Ottelin ◽  
Jaana Sorvari
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Critical Analysis ◽  
Energy Use ◽  
Green Building ◽  
Energy Performance ◽  
Energy Resources ◽  
Search Result ◽  
Energy Performance Of Buildings ◽  
Energy Aspects

Depletion of natural resources and climate change are undoubtedly the biggest challenges that humankind faces today. Here, buildings have a crucial role since they consume the majority, i.e., 30% to 40% of the total energy resources. Green building certification is one of the solutions to limit the energy use in buildings. In addition, it is seen to indicate a consideration for sustainability aspects in construction. LEED is the most widely used certificate worldwide. However, recently some critics have raised doubts about LEED and whether it actually implies sustainability. Most of the criticism has been targeted to the energy aspects of LEED. Nevertheless, there is no consensus on the usefulness of LEED: is it really beneficial for the environment, and is it worth of the money and time invested on the certification process? In this study a critical analysis of the literature to find an answer to this question is presented. Altogether 44 peer reviewed articles dealing with the abovementioned issue were selected out of 164 search result. Based on the studied material, the different aspects of LEED from the viewpoint of energy-efficiency are discussed. From the 44 reviewed articles, ten articles state that LEED certificate indicates energy efficiency while eight papers end up with an opposite conclusion. The rest of the papers do not take any stand on this matter. The study showed that energy efficiency of LEED-certified buildings is questionable especially at lower levels, i.e., certified. Therefore, it is recommended to modify the Energy and Atmosphere category of LEED in order to improve the actual energy performance of buildings.

scholarly journals HVAC’s Role in the Decarbonisation of the Existing BuildingStock - case Finland

2021 ◽  
Vol 246 ◽  
pp. 13005
Author(s):  
Terttu Vainio ◽  
Eero Nippala ◽  
Timo Kauppinen
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Building Automation ◽  
Existing Buildings ◽  
Building Stock ◽  
Existing Building ◽  
Target State ◽  
Automation Systems

The Energy Performance of Buildings Directive together with the Energy Efficiency Directive and Renewable Energy Sources Directive define the frame and target state for energy performance of the existing building stock. This should be very energy efficient and decarbonised by 2050. The Finnish target is more ambitious, to achieve the target state already in 2035. In this paper, we discuss and concretise the role of HVAC in overcoming the challenge. Buildings in the Nordic countries are already very energy efficient. Structural improvements of energy efficiency are relatively expensive and have limited potential for energy saving. The best cost-benefit ratio can be obtained by combining HVAC with dynamic building automation systems. Also the EPBD calls for improvement of building automation systems and related measurements in new as well as existing buildings. The performance of buildings can be verified and deviations can be detected by monitoring-based commissioning during their life cycle. This means that special attention must be paid to the instrumentation level and an improved online reporting system for stakeholders. As a conclusion, we see that HVAC systems are in a key role in decarbonisation of existing buildings and a strategic sector on the way to a carbon-neutral society.

scholarly journals Implementation of BIM Modelling and Simulation Tools in Reducing Annual Energy Consumption of Multifamily Dwellings

2020 ◽  
Vol 170 ◽  
pp. 01002
Author(s):  
Subbarao Yarramsetty ◽  
MVN Siva Kumar ◽  
P Anand Raj
Keyword(s):  
Energy Efficient ◽  
Energy Use ◽  
Construction Materials ◽  
Residential Building ◽  
Energy Simulation ◽  
Point Of View ◽  
Rotational Angle ◽  
Existing Building ◽  
Simulation Tools ◽  
Efficient Option

In current research, building modelling and energy simulation tools were used to analyse and estimate the energy use of dwellings in order to reduce the annual energy use in multifamily dwellings. A three-story residential building located in Kabul city was modelled in Revit and all required parameters for running energy simulation were set. A Total of 126 experiments were conducted to estimate annual energy loads of the building. Different combinations from various components such as walls, roofs, floors, doors, and windows were created and simulated. Ultimately, the most energy efficient option in the context of Afghan dwellings was figured out. The building components consist of different locally available construction materials currently used in buildings in Afghanistan. Furthermore, the best energy efficient option was simulated by varying, building orientation in 15-degree increments and glazing area from 10% to 60% to find the most energy efficient combination. It was found that combination No. 48 was best option from energy conservation point of view and 120-degree rotational angle from north to east, of the existing building was the most energy-efficient option. Also, it was observed that 60% glazing area model consumed 24549 kWh more electricity compared to the one with 10% glazing area.

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