ANALYSIS OF ENERGY EFFICIENCY IN PUBLIC BUILDINGS AFTER IMPLEMENTATION OF ENERGY SAVING MEASURES

2019 ◽  
pp. 314-320
Author(s):  
Ivan Binev
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Saving ◽  
Energy Savings ◽  
Public Buildings ◽  
The Relationship

The report analyzes energy efficiency in public buildings. A mathematical model was developed describing the relationship between energy savings and heated space in buildings with energy saving measures implemented. The resulting model can be used to predict energy savings of buildings with an accuracy of 82%. The results facilitate the process of determining the energy savings of buildings in which energy-saving measures are to be implemented.

Influence of Volumetric Capacity on Energy Consumption in Oil-Lubricated Compressed Air Systems

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Pawel Olszewski ◽  
Claus Borgnakke
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Potential Energy ◽  
Uncertainty Analysis ◽  
Control Strategy ◽  
Energy Savings ◽  
Compressed Air ◽  
Numerical Code ◽  
Volumetric Capacity

The aim of this research is to estimate the influence of compressed air volumetric capacity on the energy consumption in systems equipped with oil-lubricated screw compressors. A mathematical model of oil-lubricated screw compressors has been proposed. The model is verified by comparing with real measurements, and overall uncertainty analysis is estimated. An in-house developed numerical code (c++) is used to calculate the energy consumption in 252,000 combinations. The final result can be used to estimate the energy efficiency of existing air systems and to assess potential energy savings due to changes in the operation of the system and its control strategy.

scholarly journals ENERGY SAVING AND INTENSIFICATION OF PRODUCTION

2018 ◽  
pp. 184-187
Author(s):  
DEMUR CHOMAKHIDZE
Keyword(s):  
Energy Efficiency ◽  
Economic Development ◽  
Gross Domestic Product ◽  
Energy Conservation ◽  
Energy Saving ◽  
Energy Savings ◽  
Domestic Product ◽  
Macroeconomic Indicators ◽  
Concrete Materials ◽  
Set Up

The report analyzes the role and importance of energy conservation for Georgia. Based on concrete materials, the effectiveness of social labor and energy savings on gross domestic product (GDP) is comparable to each other. It is said that the reduction of GDP energy efficiency by 1% is almost the same, and in more than a few years, the result of GDP increase is more than the same as the productivity of public labor. In this regard, the report describes the level and dynamics of major macroeconomic indicators of the economic development of Georgia for 2013-2016. Set up events to improve the situation.

scholarly journals How to Prioritize Energy Efficiency Intervention in Municipal Public Buildings to Decrease CO2 Emissions? A Case Study from Italy

2020 ◽  
Vol 17 (12) ◽  
pp. 4434
Author(s):  
Filomena Pietrapertosa ◽  
Marco Tancredi ◽  
Michele Giordano ◽  
Carmelina Cosmi ◽  
Monica Salvia
Keyword(s):  
Energy Efficiency ◽  
Co2 Emissions ◽  
Energy Savings ◽  
Action Plan ◽  
The European Union ◽  
Public Buildings ◽  
Building Stock ◽  
End Use ◽  
Climate Crisis

The European Union 2050 climate neutrality goal and the climate crisis require coordinated efforts to reduce energy consumption in all sectors, and mainly in buildings greatly affected by the increasing temperature, with relevant CO2 emissions due to inefficient end-use technologies. Moreover, the old building stock of most countries requires suited policies to support renovation programs aimed at improving energy performances and optimize energy uses. A toolbox was developed in the framework of the PrioritEE project to provide policy makers and technicians with a wide set of tools to support energy efficiency in Municipal Public Buildings. The toolbox, available for free, was tested in the partners’ communities, proving its effectiveness. The paper illustrates its application to the Potenza Municipality case study in which the online calculator DSTool (the core instrument of the toolbox) was utilized to select and prioritize the energy efficiency interventions in public buildings implementable in a three-year action plan in terms of costs, energy savings, CO2 emissions’ reduction and return on investments. The results highlight that improvements in the building envelopes (walls and roofs), heating and lighting and photovoltaic systems allow reducing CO2 emission approximately 644 t/year and saving about 2050 MWh/year with a total three-year investment of 1,728,823 EUR.

scholarly journals Balancing User Comfort and Energy Efficiency in Public Buildings through Social Interaction by ICT Systems

Systems ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 29 ◽  
Author(s):  
Alessandro Franco
Keyword(s):  
Energy Efficiency ◽  
Social Interaction ◽  
Information And Communication Technologies ◽  
Energy Savings ◽  
Great Part ◽  
Virus Transmission ◽  
Air Cooling ◽  
Indoor Environmental Quality ◽  
Public Buildings ◽  
User Comfort

Energy efficiency, indoor environmental quality, and comfort in public buildings has received increasing attention in recent years as it can contribute to maintaining safety conditions and to the reduction of conventional fuels consumption, energy costs for building owners, and greenhouse gas emissions. People are an integral part of any building energetic ecosystem as, according to some estimates, they spend a great part of their life in indoor spaces. On one side, occupants are responsible for the energy consumption of the building and for this reason the “psychology of energy saving” has received attention since the 70s up to recent results. On the other hand, strategies for energy efficiency should not jeopardize occupants’ health and quality of life. While general awareness of the value of environmental variables has increased in the last few years, this interest has recently been further exacerbated by the spreading of the well-known COVID-19 pandemic. In fact, as most countries have started planning post-lock-down activities, there is a growing concern regarding how social distancing measures can be enforced in shared buildings and strict indoor air quality control can prevent airborne virus transmission in crowded spaces. The paper discusses the perspectives of increasing the level of social interaction of building users through the systematic use of Information and Communication Technologies (ICT), and in particular, some specific platforms. The ICT system, taking information from the occupants in a concerted way, can be an important instrument to collect data, coming both from physical sensors and from people to develop a multi-objective control strategy for the Heating, Ventilation, and Air Cooling (HVAC) systems in order to obtain energy savings whilst balancing user comfort and healthy conditions.

Impact of energy efficiency on computer numerically controlled machining

2009 ◽  
Vol 224 (4) ◽  
pp. 531-541 ◽  
Author(s):  
S E Anderberg ◽  
S Kara ◽  
T Beno
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Environmental Performance ◽  
Cost Efficiency ◽  
Energy Savings ◽  
Cost Model ◽  
Machining Parameters ◽  
Computer Numerically Controlled ◽  
The Relationship ◽  
Environmental Demands

Increasing environmental demands from governmental bodies and customers stress the importance of companies improving their environmental performance. The research presented here shows that productivity and cost efficiency improvements can be achieved alongside energy savings in a computer numerically controlled machining environment. This improves the profitability of the companies, but also leads them towards more sustainable and environmentally aware manufacturing; the relationship between machining parameters, machining costs, and energy consumption is evaluated. From this perspective, it is important that production planners etc. understand the methodological possibilities for improvements in cost and energy efficiency. The current research is based on a machining cost model and experiments where energy consumption and tool wear were monitored.

scholarly journals Comment on Pietrapertosa et al. How to Prioritize Energy Efficiency Intervention in Municipal Public Buildings to Decrease CO2 Emissions? A Case Study from Italy. Int. J. Environ. Res. Public Health 2020, 17, 4434

2021 ◽  
Vol 18 (8) ◽  
pp. 3961
Author(s):  
Miroslav Variny
Keyword(s):  
Public Health ◽  
Energy Efficiency ◽  
Research Method ◽  
Energy Savings ◽  
Environmental Research ◽  
Public Buildings ◽  
Public Building ◽  
Simplified Approach ◽  
Heated Area

This paper responds to the article by Pietrapertosa et al., doi:10.3390/ijerph17124434, published previously in the International Journal of Environmental Research and Public Health. Its aim is to discuss the appropriateness of the studied method, to analyze its weak sides and to propose its robustness improvement. Thus, data presented in the above study were examined and recalculated, yielding, among others, indicators of annual energy savings (in kWh per m2 of total heated area) and specific proposals investment costs (in € per m2 of total heated area). By analyzing the obtained data for all public buildings, a significantly simplified approach to this problematic has been suggested while several other features of the research method and some presented results lack proper reasoning and discussion. Individual approach to each public building has been proposed and discussed point-by-point to enhance the method’s applicability. As a result, more realistic outcomes are obtained, and suitable investment actions can be proposed.

scholarly journals Implementation of Innovative Energy Saving Projects to Strengthen the Competitiveness of Domestic Enterprises

2021 ◽  
pp. 188-196
Author(s):  
Olha SOBKO ◽  
Ihor KRYSOVATYY ◽  
Svitlana SMEREKA
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Alternative Energy ◽  
Energy Savings ◽  
New Technologies ◽  
Energy Audit ◽  
Economic Relations ◽  
Alternative Energy Sources ◽  
Power Stations

The article deals with the features of innovative projects launch of the energy saving on the enterprises of Ukraine, the necessity of research of essence and specific of introduction of such projects is substantiated concerning the energy-savings on enterprises, their place in the system of economic relations is examined. Foreign experience of market of innovative projects introduction of the energy-saving is investigated, that is one of the basic component elements of effective competition which is beneficial in innovative activity of enterprises, which means the launch of innovative developments, new technologies, knowledge, information. The basic most effective districting over of territory of Ukraine is demonstrated, where realization of innovative projects of the energy efficiency introduction and energy-savings of sunny power stations and surface windy power stations is carried out. Considerable technically accessible potential of power mediums production of redintegrated energy and alternative types of fuel sources in Ukraine is revealed. The basic barriers over introduction of innovative projects in the market of energy-savings are shown, in particular: limited access to technologies and innovations, high cost of services in energy efficiency, lack of skilled specialists, sub-zero quality of suggestion of services in energy efficiency in the market etc. Attention is focused on using of project management for realization of innovative projects, as a basic tool of management, in particular to the energy management and energy audit, and their basic tasks on an enterprise are given. The basic strategic constituents regarding the development of fuel and energy complex of Ukraine and its competitiveness are pointed out, as well the use of alternative energy sources on a period to 2035, that is mentioned in operating Power strategy «Safety, energy efficiency, competitiveness». The mechanism of electric power production stimulation of iterated sources in Ukraine is demonstrated which means the «Green» price for the subjects of managing that produce power from the solar and wind energy.

scholarly journals Measures to Achieve the Energy Efficiency Improvement Targets in the Multi-Apartment Residential Sector

2020 ◽  
Vol 57 (6) ◽  
pp. 40-52
Author(s):  
M. Upitis ◽  
I. Amolina ◽  
I. Geipele ◽  
N. Zeltins
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Energy Savings ◽  
Residential Buildings ◽  
Energy Performance ◽  
The European Union ◽  
Middle Income ◽  
Structural Funds ◽  
Energy Management Systems ◽  
Energy Efficiency Improvement

AbstractDirective (EU) 2018/2002 of the European Parliament and of the Council amending Directive 2012/27/EU on energy efficiency sets a target of 32.5 % energy efficiency to be achieved by 2030, with a possible upward revision in 2023. The directive also stipulates that the obligation to achieve annual energy savings must continue to be met after 2020. In addition, a revised directive on the energy performance of buildings was adopted in May 2018. It includes measures to speed up the renovation of buildings and the transition to more energy-efficient systems, as well as to improve the energy efficiency of new buildings, thus using smart energy management systems [1].Buildings consume the most energy and have the greatest energy saving potential. They are therefore crucial to achieving the European Union’s energy saving targets. The EU allocated around 14 billion EUR to improve the energy efficiency of buildings in the period of 2014–2020, of which 4.6 billion EUR was intended for residential buildings. In addition, the Member States have earmarked 5.4 billion EUR of public co-financing for the improvement of all types of buildings, of which around 2 billion EUR is allocated to residential buildings.Multi-apartment residential buildings in Latvia are in a technically unsatisfactory condition. In Latvia, the service life of multi-apartment residential buildings has been artificially extended. In addition, there is also the problem of reduced construction quality. Housing problems affect all layers of society, but they are most acute for low- and middle-income people.The aim of the research is to study, using the co-financing of the European Union Structural Funds, the activities performed during the renovation process of multi-apartment residential buildings in Latvia and to identify the shortcomings.

scholarly journals Induction motors with YY/D connection change for efficiency and power factor increasing at partial loads

2006 ◽  
Vol 19 (1) ◽  
pp. 85-98 ◽  
Author(s):  
Miloje Kostic ◽  
Jovan Radakovic
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Power Factor ◽  
Energy Savings ◽  
Induction Motors ◽  
Mean Value ◽  
The One ◽  
Partial Loads ◽  
Selection Of ◽  
Better Than

It is established that there exists a significant possibility for energy savings, on the basis of application of induction motors with YY/D connection change proposed in this paper, especially for power to 30 kW. In connection D (0.866Un), total losses and reactive loads are reduced to loads up to 75-85%. Benefits of such motors would be significant because more than 80% induction motors are light loaded (mean value ? 70%). In such manner one motor with two characteristics is attained, but that is better than to offer to the market two different motors, because only in exploitation it is possible to accurately select the one which is working with greater efficiency values in given conditions. However, at the motor with YY/D winding it is always possible, by selection of corresponding connection for (mean value) load measured in operation. Even, with connection change it is possible to adjust to load changes in future. Moreover, at loads ? 30%, energy saving by induction motors with YY/D connection is greater than the one using induction motors with thyristor controllers. Induction motors YY/D connection application may be economical in cases where it is not recommended to use higher costs of energy efficiency of motors.

scholarly journals Aspects of Energy Saving of Oil-Producing Enterprises

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 259
Author(s):  
Katarzyna Midor ◽  
Tatyana N. Ivanova ◽  
Michał Molenda ◽  
Witold Biały ◽  
Oleg V. Zakharov
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Energy Management ◽  
Energy Savings ◽  
Oil Production ◽  
Artificial Lift ◽  
Exploration And Production ◽  
Implementation Costs ◽  
Development Goals ◽  
Oil Production Technology

Increasing energy efficiency is included in the UN Sustainable Development Goals (SDGs) to be achieved by the year 2030. Enhancing energy efficiency is also one of the priority areas for improving the operational efficiency of any oil production enterprise. The energy management system of enterprises has been founded and implemented on the basis of the international standard ISO 50001:2018 and it works successfully. The energy efficiency strategy is formulated in the energy policy and integrated into the business model of the companies. Companies receive significant energy savings in the exploration and production segments through technical, technological, and organizational measures. This article shows the main directions for improving the energy efficiency of the artificial lift well stock and the results of their implementation. The main constraints on the implementation of the energy efficiency policy of oil-producing enterprises have been identified and directions for improvement of energy-saving structure have been proposed. The article proposes strategic-level classification of energy-saving measures, which is based on assessment and comparison of implementation costs, payback period, and takes into account investments into artificial lift technology, therefore allowing investment priorities in the energy management sphere to be distinguished. Advanced directions for investment in oil-production technology have been identified, and an algorithm of development and implementation of key indicators of energy consumption efficiency has been proposed.

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