scholarly journals DATABASE OF CERTIFICATES OF ENERGY EFFICIENCY OF BUILDINGS IN UKRAINE: ANALYSIS FOR NEW CONSTRUCTION

2021 ◽  
pp. 20-26
Author(s):  
V. Deshko ◽  
M. Shovkaliuk ◽  
Yu. Kuzmyna
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Specific Energy ◽  
Energy Savings ◽  
Specific Energy Consumption ◽  
Primary Energy ◽  
National Standard ◽  
The European Union ◽  
Transfer Resistance ◽  
New Buildings

Ukraine is an energy dependent country. The largest energy consumer in Ukraine is the household sector and industry. The technical characteristics of most existing serial buildings in Ukraine do not meet modern requirements for energy consumption. One of the tools to influence the reduction of consumption of construction resources is the introduction into the regulatory framework of requirements for improving energy efficiency. With the entry into force of the Law of Ukraine "On Energy Certification of Buildings", the development of an energy certificate has become mandatory for new buildings, state-owned buildings, local government buildings and in case of attracting public funds for thermal modernization of buildings. The energy certificate is developed by a certified energy auditor and entered into an open database in the Unified State System in the field of construction. The energy certificate contains an energy efficiency class determined by calculation according to the methodology of the national standard, which is developed taking into account European approaches to the calculation of energy consumption for different needs of buildings. The generalized analysis of the data from the available certificates is of considerable interest for estimating the characteristics of enclosing structures, engineering systems and equipment and the actual and estimated specific energy consumption of different types of buildings. In this study, the authors focused on the energy efficiency of new buildings (starting in 2019). The following indicators of residential and public buildings were analyzed: heat transfer resistance of external walls and translucent structures, specific energy consumption, primary energy, specific CO2 emissions, energy efficiency class. It was determined that the potential for energy savings compared to similar buildings in the European Union is significant, so improving the energy efficiency of the construction sector is an extremely important issue in Ukraine.

scholarly journals IMPACT OF ENERGY EFFICIENCY OF MODERN RESIDENTIAL AREA ON THE ENVIRONMENT

2021 ◽  
pp. 103
Author(s):  
Milena Mančić ◽  
Miomir Raos ◽  
Marko Mančić ◽  
Milan Protić ◽  
Milena Medenica ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Greenhouse Gas ◽  
Specific Energy ◽  
Residential Buildings ◽  
Specific Energy Consumption ◽  
Primary Energy ◽  
Construction Sector ◽  
Apartment Buildings ◽  
Energy Footprint

Improving the energy efficiency of facilities should reduce greenhouse gas (GHG) emissions and independence from energy imports, increase jobs and energy security, as well as encourage researchers in further research to be creative, innovative and competitive. With about 40% of primary energy consumption accompanied by 36% of greenhouse gas emissions, the construction sector is one of the largest consumers in Europe. Energy consumption of the construction sector in Serbia has a significant share in total energy consumption of 48%, 65% of which refers to energy consumption in residential buildings. The legislation on Energy efficiency in Serbia implies a specific energy consumption of 65[kWh/m2] for one apartment buildings and 60[kh/m2] for multi-apartment buildings.  In this paper, a settlement with 50 apartment buildings is analyzed, impact on building envelope construction and applied heating system type to carbon and primary energy footprint is estimated using the degree-day method. Although the mentioned specific energy consumption limit is determined by national legislation, this paper tackles the benefits and costs of reducing energy and carbon footprint by reducing carbon and primary energy footprint to a value lower than the mentioned limit.

scholarly journals The methodical issues of industrial energy monitoring systems implementation

2020 ◽  
pp. 47-56
Author(s):  
V. Nakhodov ◽  
O. Borychenko ◽  
A. Cherniavskyi
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Monitoring System ◽  
Energy Management ◽  
Specific Energy ◽  
Management System ◽  
Specific Energy Consumption ◽  
Monitoring Systems ◽  
Energy Management System ◽  
Energy Monitoring

Statistics show that energy is one of the highest operating costs in a manufacturing enterprise. So, improving energy efficiency can lead to a significant increase in profits and reduce the impact of the enterprise on the environment. To increase the performance of energy efficiency activities, it is necessary to implement an energy management system. One of the components of this system is energy monitoring, which, in turn, is based on the periodic collection and analysis of data to assess the state of the monitoring objects in terms of energy efficiency. In this paper, the role and place of energy monitoring in the energy management system of an industrial enterprise are noted. The paper proposes the concept of creating energy monitoring system in industrial companies, which is based on the combination of a monitoring system based on specific energy consumption, and usage of group energy characteristics of production facilities. Implementing such energy monitoring systems will allow to conduct operational control of energy efficiency of production facilities by creating individual systems for monitoring energy efficiency, as well as successfully carry out such monitoring at the enterprise and its subdivisions over longer periods of time using specific energy consumption indicators. It also provides general guidelines for conducting energy monitoring. These guidelines were formed based on the results of studying various methods and scientific publications in the field of energy monitoring, as well as on the basis of practical experience in the development and implementation of energy management systems. Particular attention is paid to the issues of processing and analysis of information about the objects of energy monitoring of industrial enterprises. The practical application of the concept of creating energy monitoring systems envisages gradual improvement of the existing monitoring system based on the specific energy consumption, which will be further completely replaced with individual energy efficiency monitoring systems.

Exergy and Energy Analysis, Drying Kinetics and Mathematical Modeling of White Mulberry Drying Process

2014 ◽  
Vol 10 (2) ◽  
pp. 269-280 ◽  
Author(s):  
Hosain Darvishi ◽  
Mohammad Zarein ◽  
Saied Minaei ◽  
Hamid Khafajeh
Keyword(s):  
Mathematical Modeling ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Moisture Content ◽  
Specific Energy ◽  
Microwave Power ◽  
Specific Energy Consumption ◽  
Drying Kinetics ◽  
Improvement Potential ◽  
White Mulberry

Abstract The energy and exergy analysis, drying characteristics and mathematical modeling of the thin-layer drying kinetics of white mulberry using microwave drying were investigated. Results indicated that values of exergy efficiency (33.63–57.08%) were higher than energy efficiency (31.85–55.56%). Specific energy consumption increased with increasing microwave power while improvement potential decreased. The specific energy consumption and improvement potential varied from 3.97 to 6.73 MJ/kg water and 0.71 to 2.97 MJ/kg water, respectively. Also, energy efficiency decreased with decrease in moisture content and microwave power level. The best exergy and energy aspect was obtained by drying at 100 W microwave power. Drying took place mainly in warming up, constant rate and falling rate periods. The Page model showed the best fit to experimental drying data. Effective diffusivity increased with decreasing moisture content and increasing microwave power. It varied from 1.06 × 10−8 to 3.45 × 10−8 m2/s, with an energy activation of 3.986 W/g.

scholarly journals Specific Energy Consumption/Use (SEC) in Energy Management for Improving Energy Efficiency in Industry: Meaning, Usage and Differences

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 247 ◽  
Author(s):  
Akvile Lawrence ◽  
Patrik Thollander ◽  
Mariana Andrei ◽  
Magnus Karlsson
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Specific Energy ◽  
Performance Indicator ◽  
Paper Industry ◽  
Specific Energy Consumption ◽  
Lack Of Information ◽  
Depth Analysis ◽  
Industrial Energy ◽  
Industrial Energy Efficiency

Although several research studies have adopted specific energy consumption (SEC) as an indicator of the progress of improved energy efficiency, publications are scarce on critical assessments when using SEC. Given the increasing importance of monitoring improved industrial energy efficiency and the rising popularity of SEC as an energy key performance indicator (e-KPI), an in-depth analysis and problematization on the pros and cons of using SEC would appear to be needed. The aim of this article is to analyse SEC critically in relation to industrial energy efficiency. By using SEC in the pulp and paper industry as an example, the results of this exploratory study show that although SEC is often used as an e-KPI in industry, the comparison is not always straightforward. Challenges emanate from a lack of information about how SEC is calculated. It is likely that SEC is an optimal e-KPI within the same study, when all deployed SECs are calculated in the same way, and with the same underlying assumptions. However, before comparing SEC with other studies, it is recommended that the assumptions on which calculations are based should be scrutinized in order to ensure the validity of the comparisons. The paper remains an important contribution in addition to the available handbooks.

scholarly journals Energy efficiency of staged reverse osmosis (RO) and closed-circuit reverse osmosis (CCRO) desalination: a model-based comparison

2020 ◽  
Vol 20 (8) ◽  
pp. 3096-3106
Author(s):  
Simeng Li ◽  
Karla Duran ◽  
Saied Delagah ◽  
Joe Mouawad ◽  
Xudong Jia ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Reverse Osmosis ◽  
Specific Energy ◽  
Numerical Models ◽  
Specific Energy Consumption ◽  
Closed Circuit ◽  
Two Stage ◽  
One Stage ◽  
Multi Stage

Abstract Reverse osmosis (RO) technologies have been widely implemented around the world to address the rising severity of freshwater scarcity. As desalination capacity increases, reducing the energy consumption of the RO process per permeate volume (i.e., specific energy consumption) is of particular importance. In this study, numerical models are used to characterize and compare the energy efficiency of one-stage continuous RO, multi-stage continuous RO, and closed-circuit RO (CCRO) processes. The simulated results across a broad range of feed salinity (5,000–50,000 ppm, i.e., 5–50 g kg−1) and recovery (40%–95%) demonstrate that, compared with the most common one-stage continuous RO, two-stage and three-stage continuous RO can reduce the specific energy consumption by up to 40.9% and 53.6%, respectively, while one-stage and two-stage CCRO can lead to 45.0% and 67.5% reduction, respectively. The differences in energy efficiencies of various RO configurations are more salient when desalinating high-salinity feed at a high recovery ratio. From the standpoints of energy saving and capital cost, the simulated results indicate that multi-stage CCRO is an optimal desalination process with great potential for practical implementation.

IoT Based Energy Efficiency Monitoring in Stamping Workshop

2020 ◽  
Author(s):  
L. Gan ◽  
W. Xiong ◽  
L. Li ◽  
L. Zhu ◽  
H. Huang
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Data Analysis ◽  
Data Storage ◽  
Energy Savings ◽  
Specific Energy Consumption ◽  
Efficient Production ◽  
Flow Energy ◽  
Wide Range ◽  
Analysis System

Abstract Stamping is employed in a wide range of applications including household appliances, automobiles, vessel, and aerospace. Due to the discrete flow energy-intensive processes and dynamic energy changes in stamping production, it has great potential for energy savings. There still lacks an effective method to monitor and analyze the energy efficiency in stamping workshop. To this end, this paper proposes an energy efficiency monitoring and analysis system based on Internet of Things (IoT). The characteristics in stamping workshop are first analyzed, the energy consumption is decomposed, and the makespan is quantified. Besides, energy efficiency indicators of energy efficiency in the press machine, specific energy consumption in the part, and energy efficiency in the workshop are analyzed and defined. Then the detailed information about the energy efficiency monitoring and analysis system as data acquisition, data transmission, data storage, data analysis, and display based on IoT is presented. Finally, a forklift stamping workshop was investigated to validate the effectiveness of the proposed method. The interface and the results of the data analysis showed that the proposed system can monitor the energy efficiency in the stamping workshop comprehensively. Furthermore, potential opportunities for energy consumption reduction and efficient production can be identified.

MODERN ENERGY POLICY AND SECTORAL SITUATION OF ENERGY SUPPLY/ENERGY CONSUMPTION IN THE HOUSE FUND OF UKRAINE

2018 ◽  
Author(s):  
Nikolay Tymchenko ◽  
◽  
Nataliia Fialko ◽  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Policy ◽  
Specific Energy ◽  
Energy Supply ◽  
Residential Buildings ◽  
Specific Energy Consumption

The article analyzes the main trends in the modern energy policy of Ukraine in the field of ensuring the energy efficiency of civilian facilities. The specific energy consumption in the processes of heating/cooling of residential buildings and the sectoral situation of energy supply/energy consumption in Ukraine are analyzed.

ULL AND ENERGY EFFICIENCY ANALYSIS OF NEW ELECTRIC LOCOMOTIVES

2017 ◽  
pp. 70-80
Author(s):  
Alexander Baklanov ◽  
Nikolay Yesin ◽  
Andrey Shilyakov
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Specific Energy ◽  
Performance Indicators ◽  
Linear Regression Analysis ◽  
Practical Importance ◽  
Specific Energy Consumption ◽  
Alternating Current ◽  
Efficiency Improvement ◽  
Passenger Cars

Objective: To study the specificities and parameters of the new, including innovative, freight and passenger electric locomotives, produced for domestic railways in the framework of the program of creating the new locomotives in 2004–2010. To analyze pull and energy efficiency parameters of direct current and alternating current electric locomotives. To estimate the maximum weight of trains and specific energy consumption of electric locomotives. To detect the advantages of new electric locomotives in comparison with those produced earlier. To develop guidelines on efficiency improvement of the new electric locomotives. Methods: Comparative analysis, methods of grade computations, linear regression analysis, power balance method. Results: The main design features and parameters of the new and earlier produced electric locomotives were studied, the former include the power of tractive motors, traction effort, as well as the speed at continuous rating of traction. The parameters of the new and earlier produced electric locomotives were compared. Key performance indicators of electric locomotives were analyzed, such as the maximum mass of a train and specific energy consumption on traction. The comparison of the above-mentioned indicators with performance indicators of earlier produced electric locomotives was given. According to calculation data and statistical data analysis the advantages of new electric locomotives were determined over those produced earlier. High performance of regenerative breaking was shown, specifically new electric locomotives. It was detected that in winter regeneration of electric energy was significantly reduced, in case of regenerative braking of passenger electric locomotives series EP1 with alternating current, as most of energy generated by tractive motors was spent on electric heating circuits of passenger cars. Guidelines on efficiency improvement of new electric locomotives were developed. Practical importance: The conditions in which new electric locomotives would implement the available advantages were determined, compared to those produced earlier. The elaborated offers make it possible to improve pull and energy efficiency of the new electric locomotives in operation.

Sea water reverse osmosis - energy efficiency & recovery

2015 ◽  
Vol 10 (1) ◽  
pp. 187-195 ◽  
Author(s):  
A. R. Evenden
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Specific Energy ◽  
Sea Water ◽  
Specific Energy Consumption ◽  
South Australia ◽  
Public Utility ◽  
Actual Performance ◽  
Australian Water ◽  
Desalination Plant

The Adelaide desalination plant, located in South Australia, was designed and built by the AdelaideAqua construction consortium for the South Australian Water Corporation (SA Water), a wholly owned public utility. Construction commenced in 2009 at a green field site (Port Stanvac) south of Adelaide, with drinking water production from October 2011 and full production capability and handover to the plant operator on 12 December 2012. The facility uses 100% renewable energy and provides the people of South Australia with one of the most energy efficient sea water desalination plants in the World. This paper examines the performance of the Adelaide desalination plant in terms of energy efficiency. Specific energy saving technologies and innovations are described, including assessment of design and actual performance. The Adelaide desalination plant has achieved 8% lower energy consumption compared to the project's initial design requirements and the specific energy consumption of 3.48 kWh/m3 compares well with industry benchmark efficiencies.

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