scholarly journals Integrated energy efficient cooling solutions for large prefabricated panels collective dwellings from the 1970s

2019 ◽  
Vol 85 ◽  
pp. 01004
Author(s):  
Marius Adam ◽  
Daniel M. Muntean ◽  
Miodrag Popov ◽  
Daniel Grecea ◽  
Viorel Ungureanu
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Urban Population ◽  
Renewable Energy Sources ◽  
Urban Housing ◽  
Urbanization Process ◽  
Cooling Systems ◽  
Entire Country ◽  
Block Level ◽  
The Individual

The intense urbanization process Romania has known during the industrialization period of the 1960-70s led to an exponential shortage in urban housing. Similar to other countries, but more specifically to the former Eastern block, Romanian state-financed collective dwellings were erected starting from standardized projects of Reinforced Concrete Large Prefabricated Panels (RCLPP) blocks of flats, generating nowadays a particular built stock of identical buildings and several apartment types, widespread throughout the entire country. These buildings currently house 60% of the urban population of Romania that own 96% of the apartments, as opposed to the European trends regarding the number of owner-occupied barely reaching 60%. Even though at not even half of their intended lifespan, the collective dwellings do not satisfy basic comfort conditions such as cooling and ventilation, being in an urge of retrofitting and upgrading. Individually applicable cooling systems undertaken by the owners have proved to be acceptable, but did not, however, contribute to a decrease in the overall energy consumption of the buildings. The present paper analyses the individual cooling systems being currently applied in Romanian apartments as opposed to a global-holistic system on block level, in terms of energy consumption and efficiency, flexibility of owner controlled indoor microclimate. The results show the potential of introducing renewable energy sources as viable alternatives for the existing systems.

scholarly journals Modelling Stochastic Electricity Demand of Electric Vehicles Based on Traffic Surveys—The Case of Austria

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1577
Author(s):  
Albert Hiesl ◽  
Jasmine Ramsebner ◽  
Reinhard Haas
Keyword(s):  
Electric Vehicles ◽  
Renewable Energy Sources ◽  
Length Distribution ◽  
Electricity Demand ◽  
Transport Sector ◽  
Trip Purpose ◽  
Entire Country ◽  
Electricity Load ◽  
The Individual ◽  
Model Based Analysis

Battery-powered electric mobility is currently the most promising technology for the decarbonisation of the transport sector, alongside hydrogen-powered vehicles, provided that the electricity used comes 100% from renewable energy sources. To estimate its electricity demand both nationwide and in individual smaller communities, a calculation based assessment on driving profiles that are as realistic as possible is required. The developed model based analysis presented in this paper for the creation of driving and thus electricity load profiles makes it possible to build different compositions of driving profiles. The focus of this paper lies in the analysis of motorised private transport, which makes it possible to assess future charging and load control potentials in a subsequent analysis. We outline the differences in demand and driving profiles for weekdays as well as for Saturdays, Sundays and holidays in general. Furthermore, the modelling considers the length distribution of the individual trips per trip purpose and different start times. The developed method allows to create individual driving and electric vehicle (EV) demand profiles as well as averaged driving profiles, which can then be scaled up and analysed for an entire country.

scholarly journals Assessment Methodology for Efficiency, CO2-Emissions and Primary Energy Consumption for Refrigeration Technologies in the Industry

2018 ◽  
Vol 882 ◽  
pp. 215-220
Author(s):  
Matthias Koppmann ◽  
Raphael Lechner ◽  
Tom Goßner ◽  
Markus Brautsch
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Assessment Methodology ◽  
Alternative Technologies ◽  
Overall Efficiency ◽  
Chp System ◽  
The Individual

Process cooling and air conditioning are becoming increasingly important in the industry. Refrigeration is still mostly accomplished with compression chillers, although alternative technologies are available on the market that can be more efficient for specific applications. Within the scope of the project “EffiCool” a technology toolbox is currently being developed, which is intended to assist industrials users in selecting energy efficient and eco-friendly cooling solutions. In order to assess different refrigeration options a consistent methodology was developed. The refrigeration technologies are assessed regarding their efficiency, CO2-emissions and primary energy consumption. For CCHP systems an exergetic allocation method was implemented. Two scenarios with A) a compression chiller and B) an absorption chiller coupled to a natural gas CHP system were calculated exemplarily, showing a greater overall efficiency for the CCHP system, although the individual COP of the chiller is considerably lower.

scholarly journals Energy-Efficient Buildings, a step towards Sustainability in Pakistan

2019 ◽  
Vol 4 (4) ◽  
pp. 109-124
Author(s):  
Hashir Usman
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Energy State ◽  
Renewable Energy Sources ◽  
Building Energy ◽  
Developed Countries ◽  
Zero Energy ◽  
The World

With every passing year, energy consumption in the world is increasing drastically. Most of the energy comes from fossil fuels which are also depleting in a fast manner. Buildings consume a significant amount of energy all over the world and the demand for energy is also increasing unremittingly in buildings. Developed countries are taking profound measures in order to make buildings energy efficient and sustainable by achieving nearly zero energy stage. Pakistan is facing a serious energy crisis from the past few decades. The building sector in Pakistan deserves special attention in this regard since the energy consumption in buildings in Pakistan is feverishly high. Many types of research have been carried out in Pakistan by the United Nations and Energy Department of Pakistan in order to devise applicable methods that not only provide thermal comfort to the occupants but also make a building energy efficient. Renewable energy also plays an important role in compensating building energy demands. It is easy to achieve nearly zero energy state in a good energy efficient building if it is coupled with renewable energy sources then it will make it self-sufficient in energy demand. A survey is also carried out to determine the thermal comfort of the occupants in different types of areas. Also, solar energy analysis is also taken into account to highlight the solar power potential in Pakistan. Several recommendations have also been suggested to implement energy efficiency measures in Pakistan.

The trend of urbanization in North 24 Parganas District of West Bengal

2021 ◽  
Vol 67 (2) ◽  
pp. 172-183
Author(s):  
Mashihur Rahaman ◽  
◽  
Damodar Panda ◽  
Keyword(s):  
Growth Rate ◽  
Temporal Pattern ◽  
Urban Population ◽  
West Bengal ◽  
The State ◽  
Urbanization Process ◽  
Urban Centers ◽  
Economic Disparity ◽  
Trend Pattern ◽  
Block Level

In response to the changes in the human and natural environment, developing countries have experienced dramatic urbanization. In this paper, North 24 Parganas district has been taken to understand the changing pattern and the causes of urbanization, its relationship with socio-economic development. The urbanization process has been analyzed for the period 1951-2011 of all the 22 Blocks using the Census of India data. The decadal growth rate of urban population and urban centers are analyzed to study the trend pattern of urbanization. The trend of urbanization in the district shows a different pattern than in the state. Though the share of the urban population and the number of urban centers in the district are the highest in the state, the growth rate of the urban population shows a declining trend. At the Block level, the spatial and temporal pattern of urbanization in the district is highly variable due to socio-economic disparity. The western part of the district shows highly urbanized due to its proximity to the agglomeration and outgrowth of the Kolkata metropolitan Centre.

scholarly journals Combined Investigation of Indoor Climate Parameters and Energy Performance of a Winery

2021 ◽  
Vol 11 (2) ◽  
pp. 593
Author(s):  
Giorgos Panaras ◽  
Panagiotis Tzimas ◽  
Evangelos I. Tolis ◽  
Giannis Papadopoulos ◽  
Aristeidis Afentoulidis ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Thermal Parameters ◽  
Indoor Climate ◽  
Wine Production ◽  
Photovoltaic Array ◽  
Research Level ◽  
The Individual ◽  
Theoretical Analyses

Wineries present significant interest on a research level, combining Indoor Air Quality (IAQ) issues related with substances emitted through the wine production, as well as the need for minimizing conventional energy consumption (optimizing energy performance). In the proposed work, experimental and theoretical analyses are presented which aim to achieve both targets, that of improved indoor climate and energy performance. An extensive measurement campaign was implemented, regarding indoor climate thermal parameters, as well as concentration of substances (CO2, VOCs, NO2) affecting IAQ. The results of the parameters were exploited for the assessment of indoor climate; moreover, data from indoor thermal parameters together with values of specific parameters related to the efficiency of the individual devices were utilized in the development of the energy model. The model was used to formulate and evaluate proposals for reducing the energy consumption of the winery. The proposals include the use of Renewable Energy Sources (RES) and, in particular, the installation of a photovoltaic array on the roof of the premises. Finally, an economic and technical study was carried out to determine the performance of the suggested interventions and the expected payback period.

A Novel Approach to Large Scale Applications of Superconductivity: The Concept of an All Superconducting Mini Power Plant

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3717-3721
Author(s):  
Istvan Vajda
Keyword(s):  
Energy Efficient ◽  
Power Plants ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Local Power ◽  
Power Devices ◽  
Power Stations ◽  
Environmental Friendly ◽  
Novel Approach ◽  
The Individual

The widespread use of energy-efficient, environmental-friendly and secure local power stations, or mini power plants (MPPs) has become a world-wide trend. Disperse power generation has been developed against centralized generation in central power stations/plants with a particular view on the utilization of renewable energy sources. Exceeding the stage of the development of individual superconducting power devices (SPDs), more and more concern is being focused around all superconducting (AS) integrated systems (ASIS) consisting of a set of individual SPDs being integrated into one system with a common cryogenic environment. Such a system possesses with substantial additional benefits compared to and exceeding those of the individual SPDs. The concept of AS MPP model of the order of 10 kW developed by the author's team is presented in this paper.

scholarly journals Mitigating Climate Change Through Energy Efficient Practices in High Altitutes of Nepal

2017 ◽  
pp. 745-755
Author(s):  
Silu Bhochhibhoya ◽  
Ramesh Kumar Maskey ◽  
Sanjaya Nath Khanal
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Risk Mitigation ◽  
Renewable Energy Sources ◽  
Mitigation And Adaptation ◽  
The Impact

Climate change is a global scale crisis with drastic effects on higher altitudes. Ice melting and its corresponding impacts on mountain ecosystems are just some of the most directly visible signals of global warming. Increased rate of energy consumption, emissions along with ever growing tourist inflow in such areas has a high impact on this phenomenon. Particulate matter, Carbon Dioxide and Methane are some of the chief emissions in such areas with negative impact on the environment. Since burning of fossil fuels is one of the main root causes of cclimate change, its risk mitigation and adaptation depends greatly on energy conservation and the use of renewable energy technologies. Well insulated energy – efficient building construction method and the increased use of renewable energy sources could be the key solution. Reduction of dung-cakes and kerosene for space heating would decrease the greenhouse gas emissions as well as black carbons and particulate matters and improves the indoor living conditions. Energy efficient technologies including the building of traditional Sherpa houses could be the best practice to reduce the impact of climate change in high altitudes. This paper is primarily concerned with testing the thermal properties of insulating tiles made of locally available materials as well as to establish a correlation between energy consumption patterns in different building types with respective CO2 emissions.Subsequently, the positive attributes of such energy conserving design in relation to climate change adaptation is ascertained.

scholarly journals Towards Energy Efficient Scheduling of Manufacturing Systems through Collaboration between Cyber Physical Production and Energy Systems

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4448 ◽  
Author(s):  
Maroua Nouiri ◽  
Damien Trentesaux ◽  
Abdelghani Bekrar
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Real Time ◽  
Energy Efficient ◽  
Product Life Cycle ◽  
Production Systems ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Decision Tools ◽  
Energy Efficient Scheduling

Currently, enhancing sustainability, and in particular reducing energy consumption, is a huge challenge for manufacturing enterprises. The vision of the fourth industrial revolution (so-called “industry 4.0”) is not only to optimize production and minimize costs, but also to reduce energy consumption and enhance product life-cycle management. To address this challenge, a multi-agent architecture aimed at elaborating predictive and reactive energy-efficient scheduling through collaboration between cyber physical production and energy systems is proposed in this paper. Smart, sustainable decision tools for cyber physical production systems (CPPS) and cyber physical energy systems (CPES) are proposed. The decision tools are data-driven, agent-based models with dynamic interaction. The main aim of agent behaviours in the cyber part of CPPS is to find a predictive and reactive energy-efficient schedule. The role of agents in CPES is to control the energy consumption of connected factories and switch between the different renewable energy sources. Dynamic mechanisms in CPPS and CPES are proposed to adjust the energy consumption of production systems based on the availability of the renewable energy. The proposed approach was validated on a physically distributed architecture using networked embedded systems and real-time data sharing from connected sensors in each cyber physical systems. A series of instances inspired from the literature were tested to assess the performance of the proposed method. The results prove the efficiency of the proposed approach in adapting the energy consumption of connected factories based on a real-time energy threshold.

scholarly journals Improving the Efficiency of Heat Power Generation from Household Drains

2019 ◽  
Vol 62 (5) ◽  
pp. 482-498 ◽  
Author(s):  
S. N. Osipov ◽  
A. V. Zakharenko
Keyword(s):  
Waste Water ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Heat Exchanger ◽  
Energy Efficient ◽  
Cold Water ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Secondary Energy

Minimization of consumption by the buildings during exploitation of energy resources produced of non-renewable energy sources is the main objective of modern energy efficient construction. Currently, there are two principal solutions to this issue: the use of renewable energy sources (such as solar energy, geothermal energy, etc.) and optimization of secondary energy consumption. The paper considers one of the main approaches of secondary energy consumption, which is advisable to use in residential buildings, viz. the use of heat of household drains. Taking into account the fact that in modern energy-efficient buildings a significant amount of energy is still spent on hot water supply, one of the options for optimizing this process is the reuse of waste water heat as the initial source of heating of cold water supplied to the building. The design and technological solution of the heat exchanger, which will make the most efficient use of waste water heat for heating cold tap water possible, is proposed. A characteristic feature of the heat exchanger is the providing a screw movement of waste water along the internal standpipe. At the same time, cold water moves evenly along its outer contour, gradually being heated up from household drains. The key problem of the considered design solution is the correct choice of the appropriate slope of the screw surface, which will ensure the maximum transfer of heat to cold water and at the same time provide a quality drain, eliminating the possibility of clogging and stagnation of small particles. In order to solve this problem an assessment of the existing theoretical and practical approaches to the provision of water flow in technological pipelines which allows determining the optimal value of the slope of the surface has been fulfilled.

Geographical aspects of the diffusion of passive houses

2013 ◽  
Vol 4 (2) ◽  
pp. 151-156 ◽  
Author(s):  
G. Kozma ◽  
E. Molnár ◽  
K. Czimre ◽  
J. Pénzes
Keyword(s):  
Energy Consumption ◽  
Energy Resources ◽  
Substantial Part ◽  
Renewable Energy Resources ◽  
Passive House ◽  
The Earth ◽  
Passive Houses ◽  
The Individual ◽  
Geographical Locations ◽  
Over Time

Abstract In our days, energy issues belong to the most important problems facing the Earth and the solution may be expected partly from decreasing the amount of the energy used and partly from the increased utilisation of renewable energy resources. A substantial part of energy consumption is related to buildings and includes, inter alia, the use for cooling/heating, lighting and cooking purposes. In the view of the above, special attention has been paid to minimising the energy consumption of buildings since the late 1980s. Within the framework of that, the passive house was created, a building in which the thermal comfort can be achieved solely by postheating or postcooling of the fresh air mass without a need for recirculated air. The aim of the paper is to study the changes in the construction of passive houses over time. In addition, the differences between the geographical locations and the observable peculiarities with regard to the individual building types are also presented.

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