Energy efficiency in industry

Application of energy efficiency in industry


In the economic analysis of energy consumption in an industrial plant, energy intensity calculation – EI – which represents the ratio of energy input and financial result, that is most often product value, added value or gross national income, can also be used as an important indicator.


Display of thermovision recording in order to analyze the state of insulation and heat losses of the facility in a confectionary company.

Bearing this in mind, it is clear that energy efficiency in industry is linked to economic efficiency and includes technological, economic and behavioral changes. While avoiding energy dissipation is a matter of personal decision, it is conditioned by the possession of appropriate equipment for monitoring and managing energy flows, for regulating room temperature and for automatic extinguishing of lights when no one resides on business premises.  

What is the energy management system?

The energy management system is proposed by the European standard (EN16001) to help companies establish the systems and procedures needed to improve energy efficiency. The introduction of systematic energy management and energy flows leads to a reduction in energy costs and emissions of greenhouse gases.

Also, this standard defines the requirements that are necessary to be fulfilled so that the company develops and applies policies and goals that take into account the conditions prescribed by the law. It can be applied to all types and sizes of the company and adapted to different geographical, cultural and social conditions.

The company should carry out an internal review to determine the sites of maximum energy consumption and opportunities for improvement. This information is the basis for the establishment of an energy management system, management program and objectives.

The purpose of identifying energy flows is that the company determines where high energy consumption occurs, that is, the places where change can be introduced and thereby achieve energy savings.

These are the benefits from using energy management:

 * Reduction of energy consumption – gas, oil, electricity, etc.,

 * Possibility of using new technologies for energy recovery,

 * Raising awareness and motivation among employees,

 * Extension and improvement of process monitoring techniques,

 * Establishment and implementation of new procedures, working methods, etc.

The flows of energy fluids inside the company and energy efficiency of various processes and operations cannot be (as) easily defined. This information is essential in order to define the possibilities for energy savings. A tool that can help in overcoming this problem is an energy audit.

 What is an energy audit?

Energy audit (Review) is a procedure that helps to define how to use and consume energy, and it can help us to:

* determine the energy intensity,

* evaluate energy efficiency,

* identify possibilities and suggestions for energy saving,

* to establish a plan for the implementation of the project for energy saving.

The standard energy audit of an industrial plant is a complex task and requires the engagement of professionals from various fields including mechanical engineers, electrical engineers, construction engineers (civil engineers), architects, specialists in lighting systems and electronics, and others. The energy auditor must have experience with the processes taking place in the plant, as well as the knowledge on supply and distribution of various forms of energy in the form of heat and electricity. He should also have basic knowledge in the field of finance. This is necessary for the financial evaluation of various energy saving proposals that will come from the energy audit.

How much can be saved by increasing energy efficiency in industrial systems?


To see the potential level of savings, see the following example of comparative energy costs for non-insulated and insulated pipelines.

If the steam from the boiler is transported by a non-insulated pipeline of 150 mm diameter to a consumer of 1500 kW, located 100 m from the boiler, the heat loss is 1.5 kW/m. Energy costs calculated on the basis of the price of natural gas according to the data from 2017 (including the usefulness at the level of 77.27%) amounted to 5,368din/kWh.

The annual cost of energy for consumers is:

1500 kW x 7200 h/year x 5,368 din/kWh = 57,974,400.00 din

if the pipeline is insulated with mineral wool, heat loss decreases from 1.5 kW/m to 60 W/m. The annual cost of energy for consumers (including the usefulness level of 84.66%) is as follows:

1500 kW x 7200 h/year x 4,899 din/kWh = 52,909,200.00 din

The annual savings amounts to: 5,065,200.00 dinars.

Advantages of the application of heat pumps in the food industry


With the introduction of strict standards in order to increase the energy efficiency of industrial plants and environmental protection, greater use of heat pumps in relation to the current situation in economy is expected (for example, the world-wide presence of industrial heat pumps in the USA and France).

These are just some of the benefits of using heat pumps in the industry:

– Savings in energy consumption amounts to 15-30% and in some cases more than 50%

– Reduction of total operating costs

– Reduction of consumption of fossil fuels, preservation of their natural reserves and the reduction of harmful gases emissions

– Increasing the capacity of individual devices, such as evaporators and dryers

– They occupy much less space compared to other energy supply systems

– Reduction of investment and exploitation costs in a plant where it is necessary to achieve simultaneous process of cooling one and heating of the other process fluid

Why is it important to entrust the introduction of energy efficiency measures to experienced professionals?

In order to achieve the greatest possible benefit from the introduction of energy efficiency measures, it is necessary to entrust the implementation of energy audit and making of the feasibility study to a company that has a significant experience as well as top-level references in the following areas:    

* Energy efficiency

* Process optimization

* Energy comparative statistics

* Introduction of energy management system in accordance with EN 16001

* Creation of conceptual design and main projects for energy plants

* The application of renewable energy sources and cogeneration plants

* Conduct of trainings for energy engineers and energy flows in industrial enterprises

* Energy reviews, analysis and studies concerning the introduction of energy efficiency measures in the final energy consumption sectors

If you need advice on the introduction of energy efficiency measures, feel free to contact us at and we will do our best that you receive the response from our associates who are exquisite experts in this field, as soon as possible. 

Useful links:

Ministry of Construction, Transport and Infrastructure