scholarly journals Energy conservation at high power consuming holding furnace with modified coil design and electrical circuits

2021 ◽  
Vol 12 (2) ◽  
pp. 803
Author(s):  
D. Karthikeyan ◽  
V. P. Arumbu ◽  
P. Divya ◽  
K. Vijayakumar ◽  
K. Mani Rahulan
Keyword(s):  
Energy Consumption ◽  
Liquid Metal ◽  
Energy Conservation ◽  
High Power ◽  
High Energy ◽  
Payback Period ◽  
Coil Design ◽  
Electrical Circuits ◽  
Extended Length ◽  
Energy Consuming

This paper deals with high energy consuming induction holding furnace. The improved version of coil design along with additional electrical interlocks and alarm, modified hydraulic controls, strengthening mechanical structures and energy saving proposals at holding furnace fume extraction system ensures trouble free operation of furnace and hence continuity of production at all the planned plant operational days. This project involves in purchasing of D-section copper extruded coil from Europe–Switzerland for its extended length from existing 3 meters long to 9 Meters which enables in reduction of coil joints. The performance of the holding furnace has improved in terms ofits energy consumption per ton of liquid metal. The payback period for the estimated investment will be less than 2 years.

scholarly journals Application and Evaluation of Energy Conservation Technologies in Wastewater Treatment Plants

2019 ◽  
Vol 9 (21) ◽  
pp. 4501 ◽  
Author(s):  
Yongteng Sun ◽  
Ming Lu ◽  
Yongjun Sun ◽  
Zuguo Chen ◽  
Hao Duan ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Saving ◽  
Wastewater Treatment Plants ◽  
System Optimization ◽  
High Energy ◽  
Green Energy ◽  
Application Process ◽  
Conservation Technologies

High energy consumption is an important issue affecting the operation and development of wastewater treatment plants (WWTPs). This paper seeks energy-saving opportunities from three aspects: energy application, process optimization, and performance evaluation. Moreover, effective energy-saving can be achieved from the perspective of energy supply and recovery by using green energy technologies, including wastewater and sludge energy recovery technologies. System optimization and control is used to reduce unnecessary energy consumption in operation. Reasonable indexes and methods can help researchers evaluate the application value of energy-saving technology. Some demonstration WWTPs even can achieve energy self-sufficiency by using these energy conservation technologies. Besides, this paper introduces the challenges faced by the wastewater treatment industry and some emerging energy-saving technologies. The work can give engineers some suggestions about reducing energy consumption from comprehensive perspectives.

Research on the Energy Saving Potential of Official Cars in China

2011 ◽  
Vol 128-129 ◽  
pp. 1217-1221
Author(s):  
Quan Le Liu ◽  
Wei Chen
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Fuel Efficiency ◽  
High Energy ◽  
Maintenance Cost ◽  
Strategy Method ◽  
Energy Saving Potential ◽  
Energy Consuming

The quantity of official cars increased with the speed exceeding 20% every year which need much more energy be consumed to meet the official car needs. To investigate the energy saving potential of official cars in China, This paper introduced the strategy method with systemic viewpoint to reduce official cars energy consumption through analyzing the reason of high energy consuming of official cars. The resulted showed that only reduce the quantities and maintenance cost, and decline the displacement and using frequency can realize fuel efficiency of official cars.

scholarly journals EVALUATION OF ENERGY-EFFICIENT RETROFIT POTENTIAL FOR GOVERNMENT OFFICES IN INDIA

2021 ◽  
Vol 6 (2) ◽  
pp. 03-17
Author(s):  
Gazal Dandia ◽  
◽  
Pratheek Sudhakaran ◽  
Chaitali Basu ◽  
◽  
...  
Keyword(s):  
Energy Consumption ◽  
Total Energy ◽  
Energy Efficient ◽  
Energy Demand ◽  
Energy Savings ◽  
High Energy ◽  
Payback Period ◽  
Total Energy Consumption ◽  
The Cost

Introduction: High energy consumption by buildings is a great threat to the environment and one of the major causes of climate change. With a population of 1.4 billion people and one of the fastest-growing economies in the world, India is extremely vital for the future of global energy markets. The energy demand for construction activities continues to rise and it is responsible for over one-third of global final energy consumption. Currently, buildings in India account for 35% of total energy consumption and the value is growing by 8% annually. Around 11% of total energy consumption are attributed to the commercial sector. Energy-efficient retrofitting of the built environments created in recent decades is a pressing urban challenge. Presently, most energy-efficient retrofit projects focus mainly on the engineering aspects. In this paper, we evaluate various retrofitting options, such as passive architectural interventions, active technological interventions, or a combination of both, to create the optimum result for the selected building. Methods: Based on a literature study and case examples, we identified various energy-efficient retrofit measures, and then examined and evaluated those as applied to the case study of Awas Bhawan (Rajasthan Housing Board Headquarters), Jaipur, India. For the evaluation, we developed a simulation model using EQuest for each energy measure and calculated the resultant energy savings. Then, based on the cost of implementation and the cost of energy saved, we calculated the payback period. Finally, an optimum retrofit solution was formulated with account for the payback period and ease of installation. Results and discussion: The detailed analysis of various energy-efficient retrofit measures as applied to the case study indicates that the most feasible options for retrofit resulting in optimum energy savings with short payback periods include passive architecture measures and equipment upgrades.

scholarly journals Estimation and Analysis of Energy Conservation and Emissions Reduction Effects of Warm-Mix Crumb Rubber-Modified Asphalts during Construction Period

2018 ◽  
Vol 10 (12) ◽  
pp. 4521 ◽  
Author(s):  
Qing-Zhou Wang ◽  
Zhan-Di Chen ◽  
Kuo-Ping Lin ◽  
Ching-Hsin Wang
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Sustainable Use ◽  
Crumb Rubber ◽  
High Energy ◽  
Emissions Reduction ◽  
Conservation Assessment ◽  
Gas Emissions ◽  
Waste Tires ◽  
Production Stages

In order to solve the serious environmental problems caused by the rapid increase in the number of waste tires and unproper storage of waste tires, modifying the asphalt mix for roadway pavement by adding rubber crumb from recycled waste tires is one of the highly effective approach to solve the problem and can achieve the sustainable use of rubber resources. The application of warm-mix crumb rubber-modified asphalt (CRMA) overcomes some issues of the hot-mix CRMA, such as high temperature and high energy consumption. However, there is a lack of estimation methodology for the energy conservation and emission reduction during the production process of warm-mix CRMA. This study develops the estimation models for the evaluation of energy conservation and emissions reduction during different production stages of waste rubber powder, asphalt, CRMA, hot-mix CRMA, and warm-mix CRMA. A list for gas emissions during the mixing and paving process of CRMA mixtures was established through the simulated mixing measurement and paving site measurement. The results show that for each metric ton of CRMA mixture produced, warm mixing can reduce energy consumption by 18~36% and decrease gas emissions during different stages by 15~87% compared to hot mixing. The Evotherm warm-mix CRMA mixture with DAT as warm mix agent (Ev-DAT warm-mix CRMA mixture) is more energy-efficient by saving approximately 108.56 MJ of energy and reducing gas emissions during mixing and paving by at least 32% and 73%, respectively. This model can improves the technical standard of warm-mix CRMA and the energy conservation assessment.

scholarly journals A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 33 ◽  
Author(s):  
Yongming Zhang ◽  
Zhe Yan ◽  
Feng Yuan ◽  
Jiawei Yao ◽  
Bao Ding
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
High Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
High Rise ◽  
Field Data Collection ◽  
Micro Grid ◽  
Save Energy

Elevators were reported to cause an important part of building energy consumption. In general, each elevator has two operation states: The load state and power regeneration state. During operation, it has the potential to save energy by using regeneration power efficiently. In existing research, a set of energy storage devices are installed for every elevator, which is highly costly. In this paper, an energy conservation approach for elevators based on a direct current (DC) micro-grid is proposed, which has better economy. Then, an innovative energy-efficient device for the elevator group is designed based on a supercapacitor with similar characteristics and lifetimes. In a high-rise building case study, the experimental test and field data collection show that the innovative approach could result in a high energy efficiency within 15.87–23.1% and 24.1–54.5%, respectively. It is expected that the proposed method and designed device could be employed practically, saving energy consumption for elevator reconstruction.

scholarly journals Energy Conservation Analysis and Control of Hybrid Active Semiactive Suspension with Three Regulating Damping Levels

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Long Chen ◽  
Dehua Shi ◽  
Ruochen Wang ◽  
Huawei Zhou
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Shock Absorber ◽  
Sliding Mode ◽  
High Energy ◽  
Mode Decision ◽  
Linear Quadratic ◽  
Suspension Control ◽  
Lqr Controller ◽  
Semiactive Suspension

Active suspension has not been popularized for high energy consumption. To address this issue, this paper introduces the concept of a new kind of suspension. The linear motor is considered to be integrated into an adjustable shock absorber to form the hybrid active semiactive suspension (HASAS). To realize the superiority of HASAS, its energy consumption and regeneration mechanisms are revealed. And the system controller which is composed of linear quadratic regulator (LQR) controller, mode decision and switch controller, and the sliding mode control based thrust controller is developed. LQR controller is designed to maintain the suspension control objectives, while mode decision and switch controller decides the optimal damping level to tune motor thrust. The thrust controller ensures motor thrust tracking. An adjustable shock absorber with three regulating levels to be used in HASAS is trial produced and tested to obtain its working characteristics. Finally, simulation analysis is made with the experimental three damping characteristics. The impacts of adjustable damping on the motor force and energy consumption are investigated. Simulation results demonstrate the advantages of HASAS in energy conservation with various suspension control objectives. Even self-powered active control and energy regenerated to the power source can be realized.

SIMULATING OCCUPANTS' BEHAVIOR FOR ENERGY WASTE REDUCTION IN DWELLINGS: A MULTIAGENT METHODOLOGY

2013 ◽  
Vol 16 (04n05) ◽  
pp. 1350022 ◽  
Author(s):  
AYESHA KASHIF ◽  
JULIE DUGDALE ◽  
STEPHANE PLOIX
Keyword(s):  
Energy Consumption ◽  
Residential Buildings ◽  
High Energy ◽  
Research Area ◽  
Actual Distribution ◽  
Worldwide Population ◽  
Energy Needs ◽  
Energy Consuming ◽  
Energy Consumption Patterns ◽  
Using Data

Energy waste due to inhabitants' behavior in residential buildings has emerged as a potential research area due to the increasing worldwide population and growing energy needs. However, existing approaches for simulating energy consumption are mainly limited to office buildings and are based on static profiles. In this paper we propose a 4-step co-simulation methodology to assess how inhabitants' interactions with household appliances affect energy consumption. The approach is validated using a case study showing how human activities influence the energy consumption patterns of a refrigerator. The fridge was specifically chosen because it is a high energy-consuming appliance that is strongly affected by inhabitants' behaviors. In addition, modeling the fridge is nontrivial, and in choosing this appliance we show that it is possible to apply the approach to less complex appliances. A co-simulation approach is adopted with the fridge being physically modeled in Matlab and with human behavior being modeled in the Brahms language and simulation environment. The consumption distribution from the simulated scenario is compared with the actual distribution (using data from a consumption database), to find optimum values of tuning parameters with less than 10% variation. This methodology enables us to simulate how human behaviors affect energy appliance consumption.

Studies on Ecological Design Strategies of Greening of Building External Wall

2011 ◽  
Vol 224 ◽  
pp. 192-197
Author(s):  
Jing Wu ◽  
Hao Xie
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Thermal Comfort ◽  
Indoor Environment ◽  
Large Population ◽  
Building Energy ◽  
High Energy ◽  
Total Energy Consumption ◽  
External Wall ◽  
Building Energy Conservation

Building energy conservation has become the worldwide tendency since the mid-1970s. The Theory of Sustainable Development raised in 1990s as well as the deterioration of ecological environment made the building energy conservation became the international focus all over the world. China is a country with high energy consumption and large population and the percentage of its building energy consumption has reached about 25% on total energy consumption. The energy conservation condition of building external wall is one of the direct influencing factors of thermal comfort of indoor environment. However, greening is a kind of natural sunshade of the nature. The key to the study is how to improve the temperature of building walls and thermal comfort of indoor environment by the way of greening sunshade of external walls.

Consideration on Issues about Study of Building Energy Conservation

2011 ◽  
Vol 255-260 ◽  
pp. 1348-1352
Author(s):  
Wei Hua Zhang ◽  
Jia Ping Liu
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Local Governments ◽  
Building Energy ◽  
High Energy ◽  
Thermal Engineering ◽  
Technical Standards ◽  
Building Energy Conservation ◽  
Set Up ◽  
High Energy Consumption

The study and design of energy conservation has gradually become a hot and key issue in architecture. One of the core contents of such concepts as green architecture, ecological architecture, sustainable architecture, organic architecture is how to reduce high energy consumption of buildings. The study of building energy conservation has been carried out in subjects of architectural thermal engineering and energy conservation for almost 30 years. The central and local governments have set up special management agencies and departments of building energy conservation; building research institutes at all levels and numerous universities have set up research institutions for study of building energy conservation and issued a series of policies and regulations and technical standards, which received an enthusiastic response from industrial circles and have produced tens of billions of production. However, more than 95% of the existing buildings and more than 80% of new buildings of China belong to those with high energy consumption. The paper tries to interpret the deep reason of the phenomenon from the aspects of society, technology, etc. for discussion of researchers in the field of architectural thermal engineering and energy conservation.

scholarly journals Energy Flows and Carbon Footprint in the Forestry-Pulp and Paper Industry

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 725 ◽  
Author(s):  
Qingjian Zhao ◽  
Sheng Ding ◽  
Zuomin Wen ◽  
Anne Toppinen
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Carbon Footprint ◽  
Carbon Emissions ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
High Energy ◽  
Pulp And Paper ◽  
Energy Flows ◽  
Material Transportation

In the context of global climate change, energy conservation and greenhouse effect gases (GHG) reduction are major challenges to mankind. The forestry-pulp and paper industry is a typical high energy consumption and high emission industry. We conducted in-depth research on the energy flows and carbon footprint of the forestry-pulp paper industry. The results show that: (1) The main sources of energy supply include external fossil fuel coal and internal biomass fuel black liquor, which supply 30,057,300 GJ and 14,854,000 GJ respectively; in addition, the energy produced by diesel in material transportation reaches 11,624,256 GJ. (2) The main energy consumption processes include auxiliary engineering projects, material transportation, papermaking, alkali recovery, pulping and other production workshops. The percentages of energy consumption account for 26%, 18%, 15%, 10% and 6%, respectively. (3) The main sources of carbon include coal and forest biomass, reaching 770,000 tons and 1.39 million tons, respectively. (4) Carbon emissions mainly occur in fuel combustion in combined heating and power (CHP) and diesel combustion in material transportation, reaching 6.78 million tons and 790,000 tons of carbon, respectively. (5) Based on steam and electricity consumption, the indirect carbon emissions of various thermal and electric energy production units were calculated, and the key energy consumption process units and hotspot carbon flow paths were further found. This research established a theoretical and methodological basis for energy conservation and emission reduction.

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