Sep 01 2017Coskun C Bayraktar M et al Energy and exergy analyses of an industrial wood chips drying process International Journal of Low-Carbon Technologies 2009 4:224€"229 raction of vapour in air at dead state Tav average outer surface temperature of the dryer K Eq exergy from heat losses kW Ed exergy destruction kW Ÿ˜ exergy Jul 23 2009The energy and exergy analyses of industrial wood chips drying process are investigated by using the thermodynamic data obtained from the factory To the best of authors' knowledge this kind of study about the energy and exergy analyses of industrial wood chips drying process has never been done before or reported in the literature

Enviro

Downloadable (with restrictions)! Investigations into energy resources are important from the point of energy sustainability The principal objective of this study is to investigate the evolution of the operating boilers at the University of Idaho (UI) district energy plant through an exergy analysis The biomass boiler uses western red cedar chips from nearby lumber mills and provides 95% of

Design modelling energy and exergy analysis of a parabolic cooker Anthony O Onokwai a * Ugochukwu C Okonkwo b Christian O Osueke a Christian E Okafor b Tajudeen M A Olayanju a O Dahunsi a a Landmark University Omu-Aran Kwara State Nigeria b Nnamdi Azikiwe University Awka Anambra State Nigeria article info Article history: Received 9 April 2018

Aug 20 2019In the report Analysis of Commercial and Industrial Wind Energy Demand in the United States Wood Mackenzie estimates that up to 85 gigawatts of renewable energy demand exists within the largest U S companies through 2030 According to the report corporate leaders such as ATT General Motors and Facebook contracted more than six gigawatts

Practical Approach to Exergy and Thermoeconomic Analyses of Industrial Processes provides users students and practitioners of process analysis power plant design and fuel use optimization with a broad introduction and approach to computer aided process optimization It also serves as a comprehensive guide to the operational application of

Exergy and energy analysis of an AC steel electric arc furnace 381 1 Introduction The iron and steel industries are the largest industrial energy consumers According to Camdali et al (2005) approximately 12% of world energy production is used in the iron and steel sectors Bisio et al (2000) reported that after employee costs energy costs

Experimental design and 4E (energy exergy emission and

Results have been analyzed in terms of energy and exergy efficiency emissions and economics (4E) The testing practice adopted for evaluation of the performance of the ACS stove is as per the standard protocol WBT 4 2 3 The energy efficiency of an advanced cookstove was found to be 35% and the exergy efficiency of 17 3%

May 18 2014Exergy analysis of Industrial sector • Heating processes for each industry are grouped into low medium and high temperature categories • H L Brown B B Hamel B A Hedman Energy Analysis of 108 Industrial Processes Fairmount press Lilburn GA 1996 32 Energy Analysis of 108 Industrial Processes 33 Example process 34

The main objective of the exergy analysis presented in this paper is to find the critical points in the Chartherm process where it is necessary to apply some measures in order to reduce exergy consumption and to make energy use more economic and efficient both reactors destroy about the same amount of exergy (i e 3500kWkg(wood)(-1

Dec 15 2016A detailed analysis of the Danish industry is presented in this paper using the energy and exergy methods For the 22 most energy-intensive process industries which represent about 80% of the total primary energy use of the industrial sector detailed end-use models were created and analysed with data for the years 2006 and 2012

Energy exergy and economic analysis of industrial boilers By R Saidur J U Ahamed and H H Masjuki Abstract In this paper the useful concept of energy and exergy utilization is analyzed and applied to the boiler system Energy and exergy flows in a boiler have been shown in this paper The energy and exergy efficiencies have been

Industrial boiler is one of the most energy-consuming equipments in china the annual consumption of energy accounts for about one-third of the national energy consumption Industrial boilers in service at present have several severe problems such as small capacity low efficiency high energy consumption and causing severe pollution on environment In recent years our country in the big

Practical Approach to Exergy and Thermoeconomic Analyses of Industrial Processes provides users students and practitioners of process analysis power plant design and fuel use optimization with a broad introduction and approach to computer aided process optimization It also serves as a comprehensive guide to the operational application of

Downloadable (with restrictions)! The energy-utilization over a 10-year period (1994-2003) has been analysed for the South African industrial sector which consumes more primary energy than any other sector of the economy Four principal sub-sectors namely iron and steel chemical and petrochemical mining and quarrying and non-ferrous metals/non-metallic minerals were considered in this study

Combined Branch and Bound Method and Exergy Analysis for

This contribution proposes a new design methodology in energy system design which integrates the branch and bound algorithm with exergy analysis (BBEx) In a search tree representation of the design problem it applies upper and lower bounds to discharge ineffective branches at an early stage At intermediate nodes instead of solving the relaxed NLP subproblem the BBEx algorithm calculates

In this paper the energy and exergy analysis in this plant is presented The objective of this work is to develop an analysis for the energy conversion in the plant This is based on parameters that were retrieved during its normal operation and include: biomass and air flow rate temperature measurements of the flue gases throughout the

from an energy source [6] Exergy is commonly considered to be the maximum work that can obtained from a system within a specified reference environment or the quality of the energy source [7–9] Unlike energy exergy is not a conserved quantity and thus can account for inputs losses and wastes of a

The exergy analysis reveals a 99 91% transformation of electrical energy to electrical Exergy a 36 75% transformation of boiler energy to boiler exergy and 99 90% for the total energy as shown in Figure 3 This means that the quality of the energy produced in boiler was very low that is wastages were very high in boiler energy conversion

Practical Approach to Exergy and Thermoeconomic Analyses of Industrial Processes provides users students and practitioners of process analysis power plant design and fuel use optimization with a broad introduction and approach to computer aided process optimization It also serves as a comprehensive guide to the operational application of

Downloadable! Globally industry remains one of the main consumers of fossil fuels hence it is one of the prime sources of greenhouse gases (GHG) Exergy analysis methods can be applied to detect the processes inefficiencies To enhance the interconnection of the exergy and the environment theories renewable share and exergy efficiency are suggested in a contribution to sustainability

Energy-exergy analysis and energy efficiency 2018-11-5 The energy analysis based on the thermal tests shows that the average thermal efficiency of 141 coal-fired industrial boilers in Liaoning province of China is 76 08% several limitations are yet to be overcome and energy efficiency improved compared to the previous decade More

Power dissipation chip power consumption and heat flux in electronic devices have been steadily increasing over the past decade creating a need for improved methods of cooling them Nanofluids can be used as coolant for these electronics to improve their thermal performance This paper presents an analysis of the energy exergy and frictional efficiencies of different nanofluids that are

This book is devoted to the analysis and applications of energy exergy and environmental issues in all sectors of the economy including industrial processes transportation buildings and services Energy sources and technologies considered are hydrocarbons wind and solar energy fuel cells as well as thermal and electrical storage

Exergy and energy analysis of an AC steel electric arc furnace 381 1 Introduction The iron and steel industries are the largest industrial energy consumers According to Camdali et al (2005) approximately 12% of world energy production is used in the iron and steel sectors Bisio et al (2000) reported that after employee costs energy costs

However exergy analysis today is implemented far beyond technical analysis it is also employed in environmental (thermo)economic and even sustainability analysis of industrial systems Because natural ecosystems are also subjected to the basic laws of thermodynamics it is another subject of exergy analysis

This paper deals with the analysis of energy and exergy utilization in the industrial sector of Saudi Arabia by considering the sectoral energy and exergy flows for a period of 12 years from 1990 to 2001 Oil and gas chemical and petrochemical iron and steel and cement are identified as the four essential subsectors in the industrial sector