scholarly journals PROPOSING A SYSTEMATIC METHOD FOR CREATING AN ENERGY AUDIT TOOLKIT FOR COPRA PROCESSING ENTERPRISES

2011 ◽  
Vol 14 (3) ◽  
pp. 39-49
Author(s):  
Thanh Van Tran ◽  
Ha Thi Ngoc Ho ◽  
Hai Thanh Le
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
High Energy ◽  
Energy Audit ◽  
Pilot Projects ◽  
Self Assessment ◽  
Systematic Method ◽  
Processing Industry ◽  
Production Processes ◽  
High Energy Consumption

Coconut processing is one of a typical industral sector of Ben Tre Province. Due to the high energy consumption chaterization, it has been selected to perform the pilot projects of promoting cleaner production and energy efficiency. Energy audit is a suggested measure to identifine opportunities and solutions for energy savings. However it is quite an expertise-demanding and timeconsuming procedure, therefore still a few number of plants have applied energy audit for their production processes. For all those reasons, there is a need of an automatic energy audit toolkit which can help enterprises in self–assessment of the energy using and performing of energy saving measures. This reseach aims at proposing a systematic method for creating an energy audit toolkit for copra processing enterprises which is expected to be a development initiative for coconut processing industry.

scholarly journals Efficient SMA Actuation—Design and Control Concepts

Proceedings ◽  
2020 ◽  
Vol 64 (1) ◽  
pp. 20
Author(s):  
Paul Motzki
Keyword(s):  
High Speed ◽  
Thermal Activation ◽  
Energy Savings ◽  
Form Factors ◽  
High Energy ◽  
Innovative Design ◽  
Wide Range ◽  
Millisecond Range ◽  
And Control ◽  
High Energy Consumption

The versatility of the form factors of thermal shape memory alloys (SMA) in combination with their unique actuation and sensing abilities allow for the design and construction of innovative multifunctional systems. Despite the considerable number of advantages, such as their exceptional energy density, only a few SMA-based actuator systems are commercially available. One of the main reasons for this is their inefficient thermal activation and the resulting high energy consumption. The efficiency of SMA-based actuator systems can be improved by innovative design and control approaches. In the first part of this paper, the intelligent combination of SMA actuator wires with bi-stable, nonlinear spring elements is described. This combination eliminates the commonly quoted disadvantages of SMAs—slow actuation and energy inefficiency—for a wide range of applications. In particular, two energy-free actuator configurations are realized, which can be applied to any non-proportional actuation tasks. The second approach for the realization of high-speed actuation and energy efficiency is the activation of SMA wires with high voltage pulses, which leads to actuation times in the millisecond range and energy savings of up to 80% in comparison to the suppliers’ recommendations. It is shown that even high AC voltages such as typical mains supplies can be directly used for highly efficient SMA activation.

Evaluation and Assessment of Additive Manufacturing Processes Based on the Least Energy Demand in Application for Sustainable Production

2017 ◽  
Vol 871 ◽  
pp. 153-160
Author(s):  
Sven Kreitlein ◽  
Viktor Gerter ◽  
Nikolaus Urban ◽  
Jörg Franke
Keyword(s):  
Energy Efficiency ◽  
Additive Manufacturing ◽  
Reference Values ◽  
Energy Demand ◽  
Energy Savings ◽  
Reference Value ◽  
Melting Process ◽  
Relative Energy ◽  
Production Processes ◽  
Least Energy

This paper presents the Least Energy Demand as an independent reference value for evaluating energy efficiency of additive manufacturing (AM) processes. Nowadays an essential challenge is represented by a proper evaluation and calculation of the energy efficiency of production processes. The reason for this is the lack of appropriate reference values. A comprehensive comparison of the energy efficiency is not possible without consistent reference values. However, this comparison serves as a first step towards the goal in order to reveal the actual energy savings potential of additive manufacturing procedures and to take actions on this basis. Therefore, the first step is to define the general concept, which is used for the calculation of the Least Energy Demand. Moreover, the unit operation-specific Least Energy Demand EGM is introduced based on unit operations. In conclusion, the importance of EGM as a reference value for evaluating the energy efficiency of production processes, defined in DIN 8580, is explained. Within the scope of an application of the illustrated concept the Least Energy Demand and the Relative Energy Efficiency (REE) are calculated using the example of a selective laser melting process.

Smart heating panels to increase thermal comfort and efficiency

Work ◽  
2021 ◽  
Vol 68 (s1) ◽  
pp. S29-S35
Author(s):  
Damian Backes ◽  
Marten Trenktrog ◽  
Lutz Eckstein
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Energy Savings ◽  
Heating System ◽  
High Energy ◽  
Computational Effort ◽  
Fast Time ◽  
Body Regions ◽  
Driving Range ◽  
High Energy Efficiency

BACKGROUND: The increasing electrification poses new challenges with respect to thermal comfort in vehicle passenger cabins. While conventional air heating with electric heaters is technically possible, it causes significant reductions in the electric driving range. OBJECTIVE: Two contradicting objectives are to be achieved: Fast heat up to provide thermal comfort and high energy efficiency to maximize the driving range under all conditions. METHODS: This apparent area of conflict can be eased by the usage of low temperature radiation reducing the energy intensive heat up of the cabin air. In order to provide high energy efficiency, the emitted radiation should mostly be directed towards relevant body regions of the passengers, resulting in the necessity to redesign the passenger cabin. RESULTS: A novel approach to redesign and optimize the dashboard and a resulting radiation heating system are presented. In order to reduce computational effort of such an optimization, the complex three-dimensional geometry is sliced into simplified two-dimensional regions which are considered individually. The resulting heating system has been manufactured and integrated into a class A vehicle. Objective thermal comfort measurements as well as subjective comfort ratings have been conducted to validate the simulative approach and the resulting energy savings of approximately 30 %. CONCLUSIONS: The developed approach to achieve a fast time to comfort as well as an increased energy efficiency shows promising results as the heating system based on it cuts performs well considering objective and subjective measurements.

scholarly journals Energy Consumption Reduction of a Chiller Plant by Adding Evaporative Pads to Decrease Condensation Temperature

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2218
Author(s):  
Francisco J. Rey Martínez ◽  
Julio F. San José Alonso ◽  
Eloy Velasco Gómez ◽  
Ana Tejero González ◽  
Paula M Esquivias ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Savings ◽  
High Energy ◽  
Condensation Temperature ◽  
Efficiency Ratio ◽  
Energy Consumption Reduction ◽  
Consumption Reduction ◽  
Load Characteristics ◽  
Installed Capacity

The high energy consumption of cooling systems justifies the need for strategies to increase the efficiency of the facilities, in order to reduce the related CO2 emissions. This study aims to improve the performance and reduce the energy consumption of an 8.6 MW air cooled chiller. This installed capacity is biased due to the screw compressors, of 2.98 Energy Efficiency Ratio (EER) at full load (characteristics provided by the manufacturer). The chiller unit has been modified by placing evaporating cooling pads before the condensing coils. The chiller has been monitored for three months, recording over 544,322 measurements (5 min-step data), with and without the evaporative cooling pads, to assess the performance. Data comparison has been done by selecting two days (with and without evaporative panels) with the same health care load and temperatures. Implementing the proposed strategy yields an improvement in the European Seasonal Energy Efficiency Ratio (ESEER) from 3.69 to 4.83, while the Total Equivalent Warming Impact (TEWI) decreases about 1000 tCO2. Energy savings of up to 32.6 MWh result into a payback period lower than 2 years.

OPTIMAL WINDOW GEOMETRY FACTORS FOR ELEMENTARY SCHOOL BUILDINGS IN PORTUGAL

2018 ◽  
Vol 13 (1) ◽  
pp. 185-198 ◽  
Author(s):  
Jorge S. Carlos
Keyword(s):  
Energy Efficient ◽  
Energy Savings ◽  
High Energy ◽  
Building Envelope ◽  
Major Influence ◽  
Thermal Discomfort ◽  
Building Component ◽  
U Value ◽  
High Energy Consumption ◽  
Optimal Window

INTRODUCTION With respect to thermal performance, windows are the weakest component of the building envelope, essentially because the U-value is usually higher than the opaque envelope. This would allow the highest heat conductance of the building envelope. However, it also helps buildings to gain useful solar heat during winter. Therefore, it has been generally accepted that passive buildings would have small windows towards the poles and large windows facing the equator (Persson, Roos, and Wall 2006). In spite of this guideline, large or fully glazed facades have been used in modern architecture. The intensive use of air conditioning is the result of overheating and high thermal loss problems, which otherwise would lead to thermal discomfort. This extensive use of large windows associated with high energy consumption has motivated researchers to study this building component. Window areas were investigated by Persson et al. (Persson, Roos, and Wall 2006) on 20 terraced houses with larger windows facing the equator and built in Gothenburg. The building envelope was well insulated and fitted with energy efficient windows. It was found that energy efficient windows do not have a major influence on the heating demand in the winter, but it is relevant for the cooling need in summer. Therefore, reduced indoor illuminance due to small windows can be solved by enlarging them in order to obtain relevant daylighting conditions. When efficient windows are designed for a warm climate, as in Mexico, reducing heat flux and solar transmittance indoors was the best option for energy savings (Aguilar et al. 2017). However, reducing solar transmittance influences the indoor illuminance, which was not analyzed.

Calculation of the Least Energy Demand as Energy Benchmark for Applied Production Processes Based on the Unit Operation Model

2016 ◽  
Vol 856 ◽  
pp. 39-48
Author(s):  
Sven Kreitlein ◽  
Fabian Baumhoer ◽  
Fabian Ultsch ◽  
Jörg Franke
Keyword(s):  
Energy Efficiency ◽  
Production Process ◽  
Reference Values ◽  
Energy Demand ◽  
Energy Savings ◽  
Reference Value ◽  
Objective Evaluation ◽  
Unit Operation ◽  
Production Processes ◽  
Least Energy

This paper presents the Least Energy Demand as a comprehensive reference value for evaluating energy efficiency. An objective evaluation and calculation of the energy efficiency of production processes represents a substantial challenge with regard to the state of the art. The reason for this is the lack of appropriate reference values. A comprehensive comparison of the energy efficiency is not possible without consistent reference values. However, this comparison is essential for revealing the actual energy savings potential of production processes and for establishing actions on its basis. Therefore, the first step is to define the general conditions necessary to transfer the model concepts from the microscopic to the macroscopic level for the calculation of the Least Energy Demand. Then, the transferability is verified by reducing the macroscopic material parameters, which determine the amount of the Least Energy Demand significantly, to their atomic interrelations. Moreover, the unit operation-specific Least Energy Demand EGM is introduced on the basis of the unit operation and can be spent through several forms of energy. In conclusion, the importance of the EGM as a reference value for evaluating the energy efficiency of production processes of the DIN 8580 is explained. The EGM of the evaluated production process is the result of the energetic interrelations of the unit operation (s). These are identified and shown for the considered production process according to the DIN 8580.

scholarly journals Effect of the Electrodes Type on the Energy Efficiency of Microbial Fuel Cells

2018 ◽  
Vol 1 (2) ◽  
pp. 148
Author(s):  
Tsvetomila Ivanova Parvanova-Mancheva ◽  
Elena Razkazova-Velkova ◽  
Martin Martinov ◽  
Stefan Stefanov ◽  
Venko Beschkov
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Microbial Fuel Cells ◽  
Biological Treatment ◽  
High Energy ◽  
Energy Output ◽  
The Moment ◽  
Graphite Rods ◽  
High Energy Consumption

Traditional methods for wastewater treatment are associated with high energy consumption. This is why biological treatment of water is more appropriate at the moment. In our previous study, oxidation and reduction of pollutants have been proposed to be carried out in a microbial fuel cell (MFC) designed by our laboratory that simultaneously purifies wastewater from sulfide and nitrate ions and generates electricity. The experiments were carried out with two types of electrodes, graphite rods and paddling of activated carbon using a Fumapem® FFA-3-PK-75 (OH- form) membrane. The results show that the cell has higher energy output when using paddling of activated carbon as an electrode.

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 Framework for developing a new model of risk classification according to the energy usage of companies

2019 ◽  
Vol 13 (1) ◽  
pp. 1150-1161
Author(s):  
Ana Șerbănescu ◽  
Michael Krutwig
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Sustainable Use ◽  
Risk Classification ◽  
Energy Audit ◽  
Total Consumption ◽  
Developed Country ◽  
Common Framework ◽  
Energy Audits ◽  
Main Component

Abstract In the last 50 years, both the authorities and the majority of the citizens have understood the need to enforce measures to both preserve energy and reduce the costs of producing it. Nowadays, every developed country has correlated the profitability and the competitiveness of its industry with the efficient and sustainable use of energy and is therefore making conscious efforts to improve these areas. Any action program deemed to enhance energy efficiency has as main component the critical analysis of the energetic resources allocated to an activity in a given perimeter, also known as energy audit. This paper aims to develop a model of risk classification to be applied in planning and performing procedures during energy audit, which can allow a common framework to be developed in this area of audit. The stakeholders of the entity will also be offered a unitary perspective regarding the risks of the respective business, which can be helpful in their decision-making process. The research methodology of this paper consists of quantitative instruments, namely the statistical analysis of a database containing energy audit conclusions of companies in Europe. The indicators used will relate to energy savings, the number of measures implemented as a result of the audit, the percentage of energy saved from total consumption (energy efficiency) and the business line of the company. The novelty this framework will bring consists of the congruence created in the energy audit procedures of different practices and of the standardization and quality improvement in energy audit opinions. The approach of energy audits will therefore evolve towards a risk based one, rather than an analytical one. Also, we will explain the importance of energy savings for the profitability and the competitiveness of companies in the economy today, while facilitating a transparent communication with the stakeholders. This analysis is relevant especially given the fact that the cycle of 4 years after the directive of mandatory energy audit has been enforced ends with 2018 and a conclusion can be drawn before the new audit period starts in 2019.

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