A review on energy saving strategies in industrial sector

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Abstract

An industrial sector uses more energy than any other end-use sectors and currently this sector is consuming about 37% of the world's total delivered energy. Energy is consumed in the industrial sector by a diverse group of industries including manufacturing, agriculture, mining, and construction and for a wide range of activities, such as processing and assembly, space conditioning, and lighting. This paper presents a comprehensive literature review about industrial energy saving by management, technologies and policies. Latest literatures in terms of thesis (MS and PhD), journal articles, conference proceedings, web materials, reports, books, handbooks on industrial energy management, policies and energy savings strategies have been compiled. Energy saving by management including energy audit, training programs and housekeeping beside some energy management practices in the world has been reviewed. Energy saving technologies, such as use of high efficiency motors (HEMs), variable speed drives (VSDs), economizers, leak prevention and reducing pressure drop has been reviewed. Based on energy saving technologies results, it has been found that in the industrial sectors, a sizeable amount of electric energy, emissions and utility bill can be saved using these technologies. Payback periods for different energy savings measures have been identified and found to be economically viable in most cases. Finally, various energy-saving policies for few selected countries were reviewed.

Section snippets

Energy consumption

Energy is a basic need for different purposes in industrial facilities around the world. Huge amount of energy needed for countries with faster economic growth. Energy is thus a crucial factor for economic competitiveness and employment. However, global population and energy needs are increased hand-in-hand. This concern must be addressed by the international community to overcome any shortage of energy resources in the future.

World marketed energy consumption is projected to increase by 33%

Energy management

Energy management is the strategy of meeting energy demand when and where it is needed. This can be achieved by adjusting and optimizing energy using systems and procedures so as to reduce energy requirements per unit of output while holding constant or reducing total costs of producing the output from these systems [11], [12]. Energy management began to be considered one of the main functions of industrial management in the 1970s as the result of the rising price of energy and reports about

Energy saving technologies

Applications of technologies have tremendous potential to reduce industrial energy sue. Industrial energy use can also be reduce using variable speed drive in motor operated system, high efficient motors, efficient nozzles in compressed-air system, waste heat recovery system in boilers etc. Some of them are discussed as below.

Industrial energy saving by policies

Energy Policy is the manner by which a given entity (often governmental) has decided to address issues of energy development including energy production, distribution and consumption. The attributes of energy policy may include legislation, international treaties, incentives to investment, agreements, guidelines for energy conservation, taxation, energy efficiency standards, energy guide labels [37]. Energy policies are used widely in the industrial sector to meet specific energy use or energy

Conclusion

In this review, various energy savings strategies such as energy savings by management, technologies and policies have been reviewed. The role of energy management is vital and has greatly expanded in industries. Top management of the company participates in planning various energy management projects on a regular basis. It has been found that energy saving technologies for example use of high efficient electric motors, reducing boiler flue gas temperature, use of variable speed drive to match

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