Measuring the productivity impacts of energy-efficiency: The case of high-efficiency buildings

2021 ◽  
pp. 128535
Author(s):  
Souran Chatterjee ◽  
Diana Ürge-Vorsatz
Keyword(s):  
Energy Efficiency ◽  
High Efficiency

Drying and heating of scrap metal at steelmaking: industrial safety, economics, ecology

2020 ◽  
Vol 76 (12) ◽  
pp. 1353-1258
Author(s):  
V. A. Spirin ◽  
V. E. Nikol’skii ◽  
D. V. Vokhmintsev ◽  
A. A. Moiseev ◽  
P. G. Smirnov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Steel Production ◽  
Scrap Metal ◽  
Industrial Safety ◽  
Technical Solution ◽  
Metal Charge ◽  
Basic Task ◽  
Scrap Heating ◽  
Winter Time

At steel production based on scrap metal utilization, the scrap heating before charging into a melting facility is an important way of energy efficiency increase and ecological parameters improving. In winter time scrap metal charging with ice inclusions into a metal melt can result in a considerable damage of equipment and even accidents. Therefore, scrap preliminary drying is necessary to provide industrial safety. It was shown, that in countries with warm and low-snow climate with no risk of scrap metal icing up during its transportation and storing in the open air, the basic task being solved at the scrap drying is an increase of energy efficiency of steelmaking. InRussiathe scrap metal drying first of all provides the safety of the process and next - energy saving. Existing technologies of scrap metal drying and heating considered, as well as advantages and drawbacks of technical solutions used at Russian steel plants. In winter time during scrap metal heating at conveyers (Consteel process) hot gases penetrate not effectively into its mass, the heat is not enough for evaporation of wetness in the metal charge. At scrap heating by the furnace gases, a problem of dioxines emissions elimination arises. Application of shaft heaters results in high efficiency of scrap heating. However, under conditions of Russian winter the upper scrap layers are not always heated higher 0 °С and after getting into a furnace bath the upper scrap layers cause periodical vapor explosions. The shaft heaters create optimal conditions for dioxines formation, which emit into atmosphere. It was shown, that accounting Russian economic and nature conditions, the metal charge drying and heating in modified charging buckets by the heat of burnt natural gas or other additional fuel is optimal. The proposed technical solution enables to burnt off organic impurities ecologically safely, to melt down ice, to evaporate the wetness in the scrap as well as to heat the charge as enough as the charging logistics enables it. The method was implemented at several Russian steel plants. Technical and economical indices of scrap metal drying in buckets under conditions of EAF-based shop, containing two furnaces ДСП-100, presented.

A Novel Approach for Supplying Wireless Energy to Multiple Devices Simultaneously Using Sweeping Effect

2014 ◽  
pp. 43-58
Author(s):  
Askin Erdem Gundogdu ◽  
Erkan Afacan
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Power Transmission ◽  
Transmission Range ◽  
Transfer System ◽  
Wireless Power ◽  
Efficiency Loss ◽  
Novel Approach ◽  
Multiple Devices ◽  
Sweeping Effect

There has been great interest in wireless power transmission since 2007 when a novel approach was presented by a group of scientists at MIT. With this new technique, power transmission range is possible for a couple of meters with high efficiency; however, to be able to use this technique in our lives with high efficiency and long transfer range, small structured devices and new design techniques are strongly required. In this chapter, the investigation on supplying energy by sweeping was presented. The experimental results claim that energy could be supplied to multiple devices almost at the same time. If the range of chosen frequency increases, the number of devices could be increased as well, considering slight energy efficiency loss in the transfer system. The authors hope that the proposed technique gives inspiration to the designers and to the market.

scholarly journals Do Consumers Care about the Energy Efficiency of Buildings? Understanding Residential Choice Based on Energy Performance Certificates

2018 ◽  
Vol 10 (11) ◽  
pp. 4297 ◽  
Author(s):  
Hyunjoo Lee ◽  
Misuk Lee ◽  
Sesil Lim
Keyword(s):  
Energy Efficiency ◽  
Energy Demand ◽  
High Efficiency ◽  
Early Stage ◽  
Energy Performance ◽  
Price Premium ◽  
Consumer Decision Making ◽  
Residential Choice ◽  
Performance Information ◽  
The Government

Disclosing the energy performance information for buildings has been expected to become an important policy for controlling energy demand and reducing CO2 emissions, but its effectiveness remains controversial. This study investigates the effect of energy performance information on consumer residential choice by using a discrete choice experiment in South Korea. The estimation results confirmed that the energy efficiency level of the given housing has a significant effect on consumer residential choice when the related information is actually delivered. Combined with evidence from the simulation study, we suggest that obligating the owners to provide energy performance information to potential buyers/tenants would be necessary for enhancing the use of the information during the consumer decision-making process. Additionally, the simulation result implies that the effectiveness of the policy can be underestimated by the price premium related to energy efficiency. Therefore, we suggest that the government should control the price premium for high-efficiency buildings at the early stage so that the policy related to disclosing the energy performance can be on track.

scholarly journals Energies and Its Worldwide Research

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6700
Author(s):  
Nuria Novas ◽  
Alfredo Alcayde ◽  
Isabel Robalo ◽  
Francisco Manzano-Agugliaro ◽  
Francisco G. Montoya
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Storage ◽  
Power Systems ◽  
Smart Grids ◽  
High Efficiency ◽  
Scientific Journal ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy Research

Energy efficiency and management is certainly one of the key drivers of human progress. Thus, the trends in the energy research are a topic of interest for the scientific community. The aim of this study is to highlight global research trends in this field through the analysis of a scientific journal indexed exclusively in the energy and fuels category. For this purpose, a journal has been selected that is in the center of the category considering its impact factor, which is only indexed in this category and of open access, Energies of the publisher MDPI. Therefore, a bibliometric analysis of all the contents of the journal between 2008 and 2020, 13,740 documents published, has been carried out. Analyzing the articles that are linked to each other by their citations, 14 clusters or research topics have been detected: smart grids; climate change–electric energy community; energy storage; bioenergy sources; prediction algorithms applied to power; optimization of the grid link for renewable energy; wind power; sustainability of power systems; hydrocarbon improvements; conversion of thermal/electrical energy; electric motor advancements; marine renewable energy; hydropower and energy storage; and preventive techniques in power transformers. The main keywords found were electric vehicle, renewable energy, microgrid, smart grid, and energy efficiency. In short, energy research remains necessary to meet the future challenge of sustainable energy with high efficiency and the exploration of new renewable resources, all for increasingly sustainable cities.

scholarly journals Production of liquid and granulated organic fertilizers from poultry farm wastes

2020 ◽  
pp. 61-63 ◽  
Author(s):  
K. D. Buzetti ◽  
M. V. Ivanov
Keyword(s):  
Energy Efficiency ◽  
Environmental Risk ◽  
High Efficiency ◽  
Organic Fertilizers ◽  
Waste Processing ◽  
Poultry Farm ◽  
Poultry Waste ◽  
Processing Waste ◽  
Poultry Farms ◽  
The Cost

Relevance. The work shows the need for processing waste from poultry farms into organic fertilizers. The main aspects of poultry waste processing are considered. The scheme for obtaining high-efficiency granular and liquid organic fertilizers from waste from poultry farms is described and shown. Expected results from the implementation of the developed technology are considered.Results. The technology of waste processing allows you to get both solid granular and liquid organic fertilizers. At the same time, the energy efficiency ofwasteprocessingisincreased, the cost of themainproductsofpoultryfarms is reduced, and the environmental risk of waste entering the environment is minimized.

scholarly journals Measurement and Analysis of Urban Total Factor Energy Efficiency in China

2021 ◽  
Vol 261 ◽  
pp. 01020
Author(s):  
Feifei Lu ◽  
Yinling Lu ◽  
Na Lei
Keyword(s):  
Energy Efficiency ◽  
Technological Progress ◽  
High Efficiency ◽  
Malmquist Index ◽  
Coastal Areas ◽  
Central China ◽  
Measurement And Analysis ◽  
Urban Energy ◽  
Research Objects ◽  
Low Efficiency

The improvement of urban energy efficiency is of great significance to reduce carbon emissions and achieve China’s goal of carbon peak in 2030. Taking 266 cities as the research objects, the energy efficiency of each city is measured by Super-SBM model. Then the energy efficiency is decomposed by Malmquist index. The results show that: In 2006, the number of cities in high-efficiency areas is small and high efficiency areas are mostly distributed in the northeast and southeast coastal areas. There was a phenomenon of low efficiency areas agglomeration. But in 2017, the number of high-efficiency cities increased significantly. The number of high-efficiency cities in Northeast China increased, the number of high-efficiency cities in Southeast coastal areas decreased, and the number of high-efficiency cities in Central China increased and showed a phenomenon of agglomeration of high-efficiency areas or relatively high efficiency areas. According to the decomposition of urban energy efficiency, technological progress is the main driving force for the improvement of energy efficiency, and the decline of technical efficiency inhibits the improvement of energy efficiency in various cities.

scholarly journals PM Motors for High Efficiency Applications

2017 ◽  
Author(s):  
Carlos Eduardo G. Martins ◽  
Sebastião Lauro Nau
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
High Efficiency ◽  
Process Quality ◽  
Cooling Towers ◽  
Household Appliances

PM motors are suitable for nearly all applications, like pumps, elevators, compressors, blowers, extruders, generators, electric vehicles, servodrives, cooling towers, household appliances, etc. This paper will present some applications where the use of PM motors allowed for enhancements in energy efficiency and process quality.

scholarly journals Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6096
Author(s):  
Miguel Castro Oliveira ◽  
Muriel Iten ◽  
Pedro L. Cruz ◽  
Helena Monteiro
Keyword(s):  
Energy Efficiency ◽  
Heat Exchangers ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Manufacturing Industry ◽  
Energy Savings ◽  
High Efficiency ◽  
Waste Heat ◽  
Hot Air ◽  
Plant Level

Thermal processes represent a considerable part of the total energy consumption in manufacturing industry, in sectors such as steel, aluminium, cement, ceramic and glass, among others. It can even be the predominant type of energy consumption in some sectors. High thermal energy processes are mostly associated to high thermal losses, (commonly denominated as waste heat), reinforcing the need for waste heat recovery (WHR) strategies. WHR has therefore been identified as a relevant solution to increase energy efficiency in industrial thermal applications, namely in energy intensive consumers. The ceramic sector is a clear example within the manufacturing industry mainly due to the fuel consumption required for the following processes: firing, drying and spray drying. This paper reviews studies on energy efficiency improvement measures including WHR practices applied to the ceramic sector. This focuses on technologies and strategies which have significant potential to promote energy savings and carbon emissions reduction. The measures have been grouped into three main categories: (i) equipment level; (ii) plant level; and (iii) outer plant level. Some examples include: (i) high efficiency burners; (ii) hot air recycling from kilns to other processes and installation of heat exchangers; and (iii) installation of gas turbine for combined heat and power (CHP). It is observed that energy efficiency solutions allow savings up to 50–60% in the case of high efficiency burners; 15% energy savings for hot air recycling solutions and 30% in the when gas turbines are considered for CHP. Limitations to the implementation of some measures have been identified such as the high investment costs associated, for instance, with certain heat exchangers as well as the corrosive nature of certain available exhaust heat.

Electric cars or high-efficiency transport networks?

2010 ◽  
pp. 13-29
Author(s):  
Andrea Molocchi
Keyword(s):  
Energy Efficiency ◽  
Internal Combustion Engines ◽  
High Efficiency ◽  
Action Plan ◽  
Average Energy ◽  
Transport Sector ◽  
Climate Mitigation ◽  
External Costs ◽  
Electric Cars ◽  
Transport Modes

The main drivers of the electric cars diffusion which is projected in the next decade are to be seen in the industry effort to create new spaces in mature car markets (supply side), and in demand side effects of current climate mitigation policies in the transport sector, focused on CO2 emissions and energy efficiency of new vehicles sold. Indeed the energy performances of electric vehicles are projected to be highly variable; the final results of fleet average comparisons with internal combustion engines vehicles will be affected by at least: a) the real energy efficiency of the EV models (in particu- lar by their weight), b) the battery efficiency rate; c) the average energy losses of the national grids, and d) the national thermoelectric generation efficiency. For example, if sensitivity analysis on Germany or USA power plants efficiencies is undergone, EV primary energy consumptions result to be respectively +8% and +30% higher than conventional ICE cars. Moreover, EV credentials in terms of transport external costs reduction are very poor, particularly for congestion. If we look at research results comparing the external costs of different transport modes, high net benefits may be alternatively seen in public transport and rail based mobility (and also in short sea shipping for certain freight transport types) either in terms of energy efficiency and external costs reduction. An EU27 wide transport indicator based analysis is provided in chapter 4 to better highlight this "structural" additional driver of transport external costs, which has strictly little to do with vehicle level efficiency, rather it represents an efficiency in urban planning and infrastructural planning: a "system" efficiency in providing availability and access to highly energy efficient transport modes and services. In the final chapter recommendations for transport and energy European policies are provided, starting from a target setting based on external costs indicators (capturing also and not exclusively the energy efficiency and savings potential offered by transport infrastructures and vehicles), followed by an urgently needed Long term Action plan for railways networks and intermodality development. As to EVs, it is recommended to regulate them under an extension of the current EU CO2/km average target approach, by setting a common (final) energy consumption efficiency standard for all car innovations. Public funds collected from external costs road charging may be better concentrated by EU and Member States on this infrastructural Action Plan rather than on urban electricity grids for EVs.

A High Efficiency Coffee Roaster Development Based on Gas Baking Technology for Home Use

2014 ◽  
Vol 681 ◽  
pp. 23-28
Author(s):  
Hsiu Chen Hsu ◽  
Rong Chin Lo
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Touch Screen ◽  
Human Machine Interface ◽  
Experimental Results ◽  
Premixed Flame ◽  
Gaseous Emission ◽  
Personal Favorite ◽  
Machine Interface ◽  
Coffee Roasting

Home coffee roasting becomes increasingly popular in recent years. Besides freshness, coffee lover can achieve personal favorite flavors and make it with fun. In this paper, a new coffee roaster development based on gas baking method is introduced. Premixed fuel and direct-fired baking technologies are adapted for increasing energy efficiency, in which premixed flame contacts the beans inside the vertical-rotated drum. Meanwhile, a touch screen controller with fancy human machine interface is also designed for presetting roasting modes, controlling the procedures of roasting, and/or storing recent roast profile for use at other time. Experimental results show that the proposed structure is eco friendly, enriches the energy efficiency, reduces the gaseous emission, and achieves a consistent roast.

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