Energy use and energy efficiency development in the German and Colombian textile industries

Rising power costs and constraints are driving a growing focus on the energy efficiency of high performance computing systems. The unique characteristics of a particular system and workload and their effect on performance and energy efficiency are typically difficult for application users to assess and to control. Settings for optimum performance and energy efficiency can also diverge, so we need to identify trade-off options that guide a suitable balance between energy use and performance. We present statistical and machine learning models that only require a small number of runs to make accurate Pareto-optimal trade-off predictions using parameters that users can control. We study model training and validation using several parallel kernels and more complex workloads, including Algebraic Multigrid (AMG), Large-scale Atomic Molecular Massively Parallel Simulator, and Livermore Unstructured Lagrangian Explicit Shock Hydrodynamics. We demonstrate that we can train the models using as few as 12 runs, with prediction error of less than 10%. Our AMG results identify trade-off options that provide up to 45% improvement in energy efficiency for around 10% performance loss. We reduce the sample measurement time required for AMG by 90%, from 13 h to 74 min.

Download Full-text

Evaluation of CO2 emissions and energy use with different container terminal layouts

Scientific Reports ◽

10.1038/s41598-021-84958-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Muhammad Arif Budiyanto ◽

Muhammad Hanzalah Huzaifi ◽

Simon Juanda Sirait ◽

Putu Hangga Nan Prayoga

Keyword(s):

Energy Efficiency ◽

Sustainable Development ◽

Energy Consumption ◽

Statistical Analysis ◽

Energy Use ◽

Container Terminal ◽

Container Terminals ◽

Future Planning ◽

Container Handling

AbstractSustainable development of container terminals is based on energy efficiency and reduction in CO2 emissions. This study estimated the energy consumption and CO2 emissions in container terminals according to their layouts. Energy consumption was calculated based on utility data as well as fuel and electricity consumptions for each container-handling equipment in the container terminal. CO2 emissions were estimated using movement modality based on the number of movements of and distance travelled by each container-handling equipment. A case study involving two types of container terminal layouts i.e. parallel and perpendicular layouts, was conducted. The contributions of each container-handling equipment to the energy consumption and CO2 emissions were estimated and evaluated using statistical analysis. The results of the case study indicated that on the CO2 emissions in parallel and perpendicular layouts were relatively similar (within the range of 16–19 kg/TEUs). These results indicate that both parallel and perpendicular layouts are suitable for future ports based on sustainable development. The results can also be used for future planning of operating patterns and layout selection in container terminals.

Download Full-text

Environmental Citizenship and Energy Efficiency in Four European Countries (Italy, The Netherlands, Switzerland and Hungary)

Sustainability ◽

10.3390/su12031154 ◽

2020 ◽

Vol 12 (3) ◽

pp. 1154

Author(s):

Ibolya Czibere ◽

Imre Kovách ◽

Gergely Boldizsár Megyesi

Keyword(s):

Energy Efficiency ◽

The Netherlands ◽

Energy Use ◽

European Countries ◽

Linear Regression Models ◽

Financial Barriers ◽

Self Identity ◽

Horizon 2020 ◽

Number Of Factors ◽

The Social

In our paper we aim at analysing the social factors influencing energy use and energy efficiency in four different European countries, using the data from the PENNY research (Psychological social and financial barriers to energy efficiency—Horizon 2020). As a part of the project, a survey was conducted in four European countries (Italy, The Netherlands, Switzerland and Hungary) to compare environmental self-identity, values and attitudes toward the energy use of European citizens. Previous research has examined the effect of a number of factors that influence individuals’ energy efficiency, and attitudes to energy use. The novelty of our paper that presents four attitudes regarding energy use and environmental consciousness and compares them across four different regions of Europe. It analyses the differences between the four attitudes among the examined countries and tries to understand the factors explaining the differences using linear regression models of the most important socio-demographic variables. Finally, we present a typology of energy use attitudes: four groups, the members of which are basically characterised by essentially different attitudes regarding energy use. A better understanding of the diversity of energy use may assist in making more accurate policy decisions.

Download Full-text

Twelve Years of Energy Efficiency in Historic Buildings in Sweden

Restoration of Buildings and Monuments ◽

10.1515/rbm-2017-0012 ◽

2019 ◽

Vol 23 (2) ◽

pp. 41-52 ◽

Cited By ~ 1

Author(s):

Marie Claesson ◽

Tor Broström

Keyword(s):

Energy Efficiency ◽

Energy Use ◽

Research Programme ◽

Historic Buildings ◽

Indoor Climate ◽

Climate Control ◽

Energy Agency ◽

Long Term Effect ◽

Research Challenge ◽

Technical Solutions

Abstract The Swedish National Research programme for Energy Efficiency in historic buildings was initiated in 2006 by the Swedish Energy Agency. This article gives an overview of the programme: objectives, projects and the general results of the programme. The research programme aims to develop knowledge, methods and technical solutions that contribute to energy efficiency in historically valuable buildings without destroying or damaging the historical value of the buildings, including decoration, furnishings, interiors or equipment. The programme is not limited to listed and monumental buildings but covers a wider range of historic buildings that account for a large part of the energy use in the building sector. For one and two-family houses, around 25 % of the energy use is associated with buildings built before 1945. The same number for multifamily houses is around 15 %. The programme is currently in its third consecutive four-year-stage. Previous four-year-stages were completed in 2010 and 2014. Over time, the scope of the programme and the projects have developed from mainly dealing with indoor climate control in monumental buildings towards addressing more general issues in the much larger stock of non-listed buildings. Technical research, based on quantitative analysis, dominate throughout all three stages, however most projects have had interdisciplinary components. The results from the programme have been presented in 31 journal papers, 67 conference papers, five books and five PhD theses. The projects have also contributed to CEN standards and resulted in a number of Bachelors and Master’s theses. An equally important long-term effect of the programme is that the number of Swedish researchers in the field have increased from practically none in 2007 to 18 senior researchers and twelve PhD students from ten universities in 2014. The research programme on Energy Efficiency in historic buildings is unique in an international context. Hopefully it can serve as an example for other countries on how to address an important interdisciplinary research challenge.

Download Full-text

Cleaner, greener data centres

ITNOW ◽

10.1093/itnow/bwab103 ◽

2021 ◽

Vol 63 (4) ◽

pp. 18-20

Author(s):

John Booth

Keyword(s):

Climate Change ◽

Energy Efficiency ◽

Energy Use ◽

Data Centre ◽

Eu Directives ◽

Data Centres

Abstract John Booth MBCS, Data Centre Energy Efficiency and Sustainability Consultant at Carbon3IT, explores the detrimental trajectory of data centre energy use, against a backdrop of COP26, climate change and proposed EU directives.

Download Full-text

Which Is Greener? The Gas Condenser Boiler Or Ground Source Heat Pump. Which Is The Contribution Of Renewable Energy To The Energy Consumption For Heating To A Building?

Journal of Applied Engineering Sciences ◽

10.1515/jaes-2015-0015 ◽

2015 ◽

Vol 5 (2) ◽

pp. 7-12

Author(s):

I. L. Cîrstolovean

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Heat Pump ◽

Energy Use ◽

Performance Indicator ◽

Ground Source Heat Pump ◽

Renewable Energy Technologies ◽

Energy Technologies ◽

Methods Of Calculation ◽

Ground Source

Abstract The goals of this paper are: to estimate the carbon emission reduction on energy efficiency measurements in a laboratory building in Transilvania University from Braşov, Romania, in accordance with the European Directive 2009/28/EC and to estimate the contribution of renewable energy to energy efficiency of the building using the performance indicator named Renewable Energy Ratio - RER. We will detail the methods of calculation for CO2 emissions and we will present the results for gas condensing boiler, and ground source heat pump for the laboratory building. The results show that conventional energy efficiency technologies and renewable energy technologies can be used to decrease CO2 emissions in buildings by 20–30% on average and up to over 40% for some building types and locations. The contribution of renewable energy is between 40 and 50 % from total energy use and only for heating is 58%. This value could rise to 0.63 if we apply to electricity produced by photovoltaic panels.

Download Full-text

A method for energy efficiency assessment during urban energy planning

Smart and Sustainable Built Environment ◽

10.1108/sasbe-12-2013-0056 ◽

2014 ◽

Vol 3 (2) ◽

pp. 132-152 ◽

Cited By ~ 3

Author(s):

Karin Regina de Casas Castro Marins

Keyword(s):

Energy Efficiency ◽

Urban Areas ◽

Energy Use ◽

Energy Performance ◽

Urban Morphology ◽

Pollutant Emissions ◽

Energy Planning ◽

Bottom Up ◽

Content Type ◽

Urban Energy

Purpose – Energy use in urban areas has turned a subject of local and worldwide interest over the last few years, especially emphasized by the correlated greenhouse gases emissions. The purpose of this paper is to analyse the overall energy efficiency potential and emissions resulting from integrated solutions in urban energy planning, in the scale of districts and neighbourhoods in Brazil. Design/methodology/approach – The approach is based on the description and the application of a method to analyse energy performance of urban areas and support their planning. It is a quantitative bottom-up method and involves urban morphology, urban mobility, buildings and energy supply systems. Procedures are applied to the case study of Agua Branca urban development area, located in Sao Paulo, Brazil. Findings – In the case of Agua Branca area, energy efficiency measures in buildings have shown to be very important mostly for the buildings economies themselves. For the area as a whole, strategies in promoting public transport are more effective in terms of energy efficiency and also to decrease pollutant emissions. Originality/value – Literature review has shown there is a lack of approaches and procedures able to support urban energy planning at a community scale. The bottom-up method presented in this paper integrates a plenty of disaggregated and multisectoral parameters at the same stage in urban planning and shows that is possible to identify the most promising actions by building overall performance indexes.

Download Full-text

Assessing the trends of energy use of public non-domestic buildings in England and Wales

Building Services Engineering Research and Technology ◽

10.1177/0143624418806135 ◽

2018 ◽

Vol 40 (2) ◽

pp. 176-197

Author(s):

S Hong ◽

A Mylona ◽

H Davies ◽

P Ruyssevelt ◽

D Mumovic

Keyword(s):

Energy Efficiency ◽

Public Sector ◽

Energy Use ◽

Reference Points ◽

Growth Strategy ◽

Capital Investments ◽

England And Wales ◽

Informed Decisions ◽

Operational Energy ◽

Energy Use Intensity

Accessing sufficient data for understanding how energy is used in non-domestic buildings is deemed to be a challenge in many countries. In the UK, such a challenge has led to limited understanding of long-term changes in energy use of buildings. This study aims to develop a deeper understanding of the trends in energy use across the public sector non-domestic buildings in England. Display energy certificate (DEC) data which relate to 59,740 public sector non-domestic buildings in England and Wales were analysed. Statistical analyses were carried out to understand both the latest patterns of energy use and how they have changed between 2010 and 2016. The patterns of energy use of various public-sector buildings were found to have gradually changed over the seven-year period. An imminent release of a revised dataset was deemed necessary for understanding the performance of buildings to support the aspirations set out in the clean growth strategy. The study pointed to a need for regularly gathering and sharing data for understanding the changes in the patterns of energy use of the stock. Developing a framework that can facilitate this would enable various stakeholders make informed decisions for improving energy efficiency of the UK’s non-domestic buildings. Practical application: Statistics on electrical and fossil-thermal energy use intensity provide up-to-date reference points for assessing operational energy efficiency of public sector buildings. Principles for developing a framework are provided to support various stakeholders make informed decisions on for example setting design targets or making capital investments.

Download Full-text

DEVELOPMENT OF A NEW CO2-BASED DEMAND-CONTROLLED VENTILATION STRATEGY USING ENERGYPLUS

10.31224/osf.io/h6mdn ◽

2017 ◽

Author(s):

Behrang Chenari ◽

Francisco Bispo Lamas ◽

Adélio Rodrigues Gaspar ◽

Manuel Gameiro da Silva

Keyword(s):

Energy Efficiency ◽

Indoor Air ◽

Energy Use ◽

Energy Savings ◽

Environmental Condition ◽

Ventilation Strategy ◽

Controlled Ventilation ◽

New Strategy ◽

Demand Controlled Ventilation ◽

Air Conditioning Systems

A significant amount of energy is being used by ventilation and air conditioning systems to maintain the indoor environmental condition in a satisfactory and comfortable level. Many buildings, either new or existing (throughout their renovation process) are subjected to energy efficiency requirements but these must not be in the expenses of indoor environmental conditions. For instance, indoor air quality (IAQ) has to be considered while improving energy efficiency, otherwise occupants might be exposed to inappropriate indoor environment.Demand-controlled ventilation (DCV) is a method that provides comfortable IAQ level with lowest energy use. In this paper, the main objective is developing a new CO2-based DCV strategy and simulating it using EnergyPlus. The IAQ and energy consumption associated to this strategy have been compared with the results of CO2-based DCV strategies previously developed by the same authors in another article. The comparison shows that the new strategy performs better, both in energy use and IAQ. The recorded energy savings ranged between 6-14% comparing with the previously developed strategies while IAQ slightly improved.

Download Full-text